/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/avg05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:24:51,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:24:51,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:24:51,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 22:24:51,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:24:51,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:24:51,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:24:51,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:24:51,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:24:51,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:24:51,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:24:51,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:24:51,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:24:51,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:24:51,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:24:51,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:24:51,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:24:51,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:24:51,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:24:51,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:24:51,474 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:24:51,487 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:24:51,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:24:51,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:24:51,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:24:51,489 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:24:51,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:24:51,489 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:24:51,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:24:51,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:24:51,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:24:51,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:24:51,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:24:51,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:24:51,491 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:24:51,491 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:24:51,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:24:51,491 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:24:51,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:24:51,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:24:51,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:24:51,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:24:51,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:24:51,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:24:51,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:24:51,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:24:51,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:24:51,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:24:51,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:24:51,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:24:51,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:24:51,765 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:24:51,786 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:24:51,789 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:24:51,792 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:24:51,792 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:24:51,793 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg05-1.i [2019-11-23 22:24:51,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e08d998c5/db976ae061d443fcb5f75d5b7d02a56e/FLAG682166d50 [2019-11-23 22:24:52,286 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:24:52,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg05-1.i [2019-11-23 22:24:52,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e08d998c5/db976ae061d443fcb5f75d5b7d02a56e/FLAG682166d50 [2019-11-23 22:24:52,663 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e08d998c5/db976ae061d443fcb5f75d5b7d02a56e [2019-11-23 22:24:52,672 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:24:52,674 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:24:52,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:24:52,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:24:52,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:24:52,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:24:52" (1/1) ... [2019-11-23 22:24:52,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18bcd91b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:52, skipping insertion in model container [2019-11-23 22:24:52,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:24:52" (1/1) ... [2019-11-23 22:24:52,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:24:52,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:24:52,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:24:52,947 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:24:52,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:24:52,994 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:24:52,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:52 WrapperNode [2019-11-23 22:24:52,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:24:52,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:24:52,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:24:52,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:24:53,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:52" (1/1) ... [2019-11-23 22:24:53,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:52" (1/1) ... [2019-11-23 22:24:53,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:24:53,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:24:53,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:24:53,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:24:53,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:52" (1/1) ... [2019-11-23 22:24:53,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:52" (1/1) ... [2019-11-23 22:24:53,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:52" (1/1) ... [2019-11-23 22:24:53,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:52" (1/1) ... [2019-11-23 22:24:53,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:52" (1/1) ... [2019-11-23 22:24:53,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:52" (1/1) ... [2019-11-23 22:24:53,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:52" (1/1) ... [2019-11-23 22:24:53,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:24:53,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:24:53,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:24:53,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:24:53,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:52" (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 [2019-11-23 22:24:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:24:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:24:53,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:24:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:24:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:24:53,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:24:53,494 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:24:53,494 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:24:53,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:24:53 BoogieIcfgContainer [2019-11-23 22:24:53,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:24:53,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:24:53,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:24:53,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:24:53,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:24:52" (1/3) ... [2019-11-23 22:24:53,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4323645c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:24:53, skipping insertion in model container [2019-11-23 22:24:53,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:24:52" (2/3) ... [2019-11-23 22:24:53,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4323645c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:24:53, skipping insertion in model container [2019-11-23 22:24:53,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:24:53" (3/3) ... [2019-11-23 22:24:53,503 INFO L109 eAbstractionObserver]: Analyzing ICFG avg05-1.i [2019-11-23 22:24:53,513 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:24:53,520 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:24:53,534 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:24:53,580 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:24:53,581 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:24:53,581 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:24:53,581 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:24:53,581 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:24:53,582 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:24:53,582 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:24:53,582 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:24:53,619 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 22:24:53,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:24:53,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:53,627 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:53,627 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:53,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 22:24:53,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:53,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158821474] [2019-11-23 22:24:53,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:24:53,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158821474] [2019-11-23 22:24:53,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:24:53,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:24:53,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315643266] [2019-11-23 22:24:53,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:24:53,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:24:53,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:24:53,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:24:53,848 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 22:24:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:24:53,890 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 22:24:53,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:24:53,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:24:53,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:24:53,902 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:24:53,902 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:24:53,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:24:53,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:24:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 22:24:53,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:24:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 22:24:53,937 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 22:24:53,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:24:53,937 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 22:24:53,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:24:53,938 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 22:24:53,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:24:53,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:53,939 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:53,939 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:53,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:53,940 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 22:24:53,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:53,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967996071] [2019-11-23 22:24:53,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:24:54,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967996071] [2019-11-23 22:24:54,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:24:54,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:24:54,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144456682] [2019-11-23 22:24:54,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:24:54,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:24:54,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:24:54,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:24:54,015 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 22:24:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:24:54,080 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 22:24:54,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:24:54,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:24:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:24:54,082 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:24:54,082 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:24:54,083 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:24:54,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:24:54,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 22:24:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:24:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 22:24:54,090 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 22:24:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:24:54,091 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 22:24:54,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:24:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 22:24:54,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:24:54,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:54,093 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:54,093 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:54,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:54,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 22:24:54,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:54,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436611200] [2019-11-23 22:24:54,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:24:54,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436611200] [2019-11-23 22:24:54,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:24:54,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:24:54,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334750919] [2019-11-23 22:24:54,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:24:54,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:24:54,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:24:54,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:24:54,211 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 22:24:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:24:54,233 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 22:24:54,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:24:54,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 22:24:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:24:54,236 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:24:54,236 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:24:54,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:24:54,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:24:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 22:24:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:24:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 22:24:54,249 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 22:24:54,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:24:54,250 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 22:24:54,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:24:54,250 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 22:24:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:24:54,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:54,252 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:54,252 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:54,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:54,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 22:24:54,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:54,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879918665] [2019-11-23 22:24:54,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:24:54,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879918665] [2019-11-23 22:24:54,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906991635] [2019-11-23 22:24:54,354 INFO L94 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 [2019-11-23 22:24:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:54,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:24:54,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:24:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:24:54,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:24:54,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:24:54,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998341261] [2019-11-23 22:24:54,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:24:54,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:24:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:24:54,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:24:54,503 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 22:24:54,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:24:54,536 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 22:24:54,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:24:54,539 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 22:24:54,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:24:54,540 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:24:54,540 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:24:54,543 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:24:54,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:24:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 22:24:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:24:54,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 22:24:54,552 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 22:24:54,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:24:54,554 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 22:24:54,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:24:54,554 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 22:24:54,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:24:54,555 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:54,558 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:54,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:24:54,763 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:54,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:54,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 22:24:54,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:54,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594878382] [2019-11-23 22:24:54,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:24:54,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594878382] [2019-11-23 22:24:54,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237481731] [2019-11-23 22:24:54,873 INFO L92 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 [2019-11-23 22:24:54,963 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:24:54,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:24:54,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:24:54,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:24:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:24:55,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:24:55,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 22:24:55,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895372021] [2019-11-23 22:24:55,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:24:55,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:24:55,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:24:55,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:24:55,008 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 22:24:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:24:55,067 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 22:24:55,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:24:55,068 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 22:24:55,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:24:55,068 INFO L225 Difference]: With dead ends: 59 [2019-11-23 22:24:55,068 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:24:55,069 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:24:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:24:55,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 22:24:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:24:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 22:24:55,075 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 22:24:55,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:24:55,075 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 22:24:55,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:24:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 22:24:55,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:24:55,076 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:55,076 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:55,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:24:55,280 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:55,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:55,280 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 22:24:55,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:55,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360890153] [2019-11-23 22:24:55,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:24:55,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360890153] [2019-11-23 22:24:55,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877945151] [2019-11-23 22:24:55,366 INFO L92 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 [2019-11-23 22:24:55,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:24:55,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:24:55,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:24:55,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:24:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:24:55,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:24:55,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 22:24:55,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719368373] [2019-11-23 22:24:55,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:24:55,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:24:55,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:24:55,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:24:55,454 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 22:24:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:24:55,546 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 22:24:55,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:24:55,547 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 22:24:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:24:55,548 INFO L225 Difference]: With dead ends: 71 [2019-11-23 22:24:55,548 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:24:55,548 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:24:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:24:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 22:24:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:24:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 22:24:55,554 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 22:24:55,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:24:55,555 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 22:24:55,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:24:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 22:24:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:24:55,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:55,556 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:55,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:24:55,760 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:55,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:55,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 22:24:55,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:55,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092249580] [2019-11-23 22:24:55,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:24:55,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092249580] [2019-11-23 22:24:55,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186131577] [2019-11-23 22:24:55,849 INFO L92 rtionOrderModulation]: Changing 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 [2019-11-23 22:24:55,893 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:24:55,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:24:55,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:24:55,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:24:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 22:24:55,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:24:55,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 22:24:55,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680559389] [2019-11-23 22:24:55,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:24:55,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:24:55,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:24:55,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:24:55,939 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 22:24:56,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:24:56,056 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2019-11-23 22:24:56,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:24:56,057 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 22:24:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:24:56,058 INFO L225 Difference]: With dead ends: 84 [2019-11-23 22:24:56,058 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 22:24:56,059 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:24:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 22:24:56,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-11-23 22:24:56,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:24:56,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 22:24:56,076 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 22:24:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:24:56,077 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 22:24:56,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:24:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 22:24:56,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:24:56,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:56,085 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:56,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:24:56,286 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:56,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:56,286 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 22:24:56,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:56,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287234602] [2019-11-23 22:24:56,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 22:24:56,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287234602] [2019-11-23 22:24:56,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080958891] [2019-11-23 22:24:56,412 INFO L92 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 [2019-11-23 22:24:56,485 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:24:56,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:24:56,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:24:56,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:24:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 22:24:56,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:24:56,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2019-11-23 22:24:56,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817277577] [2019-11-23 22:24:56,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:24:56,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:24:56,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:24:56,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:24:56,537 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2019-11-23 22:24:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:24:56,661 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2019-11-23 22:24:56,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:24:56,662 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2019-11-23 22:24:56,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:24:56,663 INFO L225 Difference]: With dead ends: 91 [2019-11-23 22:24:56,665 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:24:56,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:24:56,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:24:56,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 22:24:56,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 22:24:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 22:24:56,676 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 22:24:56,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:24:56,676 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 22:24:56,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:24:56,676 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 22:24:56,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 22:24:56,677 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:56,677 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:56,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:24:56,883 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:56,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1501769716, now seen corresponding path program 6 times [2019-11-23 22:24:56,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:56,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218552522] [2019-11-23 22:24:56,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:24:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 22:24:56,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218552522] [2019-11-23 22:24:56,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124709313] [2019-11-23 22:24:56,973 INFO L92 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 [2019-11-23 22:24:57,092 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-23 22:24:57,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:24:57,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:24:57,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:24:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 22:24:57,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:24:57,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2019-11-23 22:24:57,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667677276] [2019-11-23 22:24:57,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:24:57,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:24:57,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:24:57,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:24:57,181 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 11 states. [2019-11-23 22:24:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:24:57,304 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2019-11-23 22:24:57,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:24:57,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2019-11-23 22:24:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:24:57,306 INFO L225 Difference]: With dead ends: 101 [2019-11-23 22:24:57,306 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 22:24:57,307 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:24:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 22:24:57,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-11-23 22:24:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 22:24:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 22:24:57,320 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 57 [2019-11-23 22:24:57,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:24:57,321 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 22:24:57,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:24:57,321 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 22:24:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 22:24:57,323 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:24:57,323 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:24:57,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:24:57,529 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:24:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:24:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash 975610632, now seen corresponding path program 7 times [2019-11-23 22:24:57,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:24:57,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685376678] [2019-11-23 22:24:57,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:24:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:17,673 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2019-11-23 22:25:17,821 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2019-11-23 22:25:18,421 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 47 [2019-11-23 22:25:18,679 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 53 [2019-11-23 22:25:18,939 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 49 [2019-11-23 22:25:19,206 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 55 [2019-11-23 22:25:19,720 WARN L192 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 52 [2019-11-23 22:25:20,203 WARN L192 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 50 [2019-11-23 22:25:20,498 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 52 [2019-11-23 22:25:21,015 WARN L192 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 33 [2019-11-23 22:25:23,110 WARN L192 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 236 DAG size of output: 89 [2019-11-23 22:25:28,459 WARN L192 SmtUtils]: Spent 4.89 s on a formula simplification. DAG size of input: 328 DAG size of output: 86 [2019-11-23 22:25:38,869 WARN L192 SmtUtils]: Spent 8.69 s on a formula simplification. DAG size of input: 329 DAG size of output: 127 [2019-11-23 22:25:59,729 WARN L192 SmtUtils]: Spent 19.78 s on a formula simplification. DAG size of input: 334 DAG size of output: 132 [2019-11-23 22:26:19,874 WARN L192 SmtUtils]: Spent 18.11 s on a formula simplification. DAG size of input: 342 DAG size of output: 168