/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/eca-rers2012/Problem18_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:21:32,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:21:32,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:21:32,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:21:32,670 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 21:21:32,686 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:21:32,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:21:32,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:21:32,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:21:32,688 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:21:32,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:21:32,689 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:21:32,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:21:32,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:21:32,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:21:32,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:21:32,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:21:32,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:21:32,691 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:21:32,692 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:21:32,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:21:32,692 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:21:32,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:21:32,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:21:32,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:21:32,693 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:21:32,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:21:32,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:21:32,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:21:32,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:21:32,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:21:32,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:21:32,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:21:32,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:21:32,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:21:32,979 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:21:32,997 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:21:33,001 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:21:33,002 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:21:33,003 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:21:33,004 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label12.c [2019-11-23 21:21:33,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394b7bc4e/3b748bf11ba94a618716d534aa9be392/FLAG478d0ebb4 [2019-11-23 21:21:33,792 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:21:33,792 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label12.c [2019-11-23 21:21:33,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394b7bc4e/3b748bf11ba94a618716d534aa9be392/FLAG478d0ebb4 [2019-11-23 21:21:33,895 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394b7bc4e/3b748bf11ba94a618716d534aa9be392 [2019-11-23 21:21:33,907 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:21:33,909 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:21:33,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:21:33,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:21:33,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:21:33,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:21:33" (1/1) ... [2019-11-23 21:21:33,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d6e06a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:33, skipping insertion in model container [2019-11-23 21:21:33,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:21:33" (1/1) ... [2019-11-23 21:21:33,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:21:34,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:21:35,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:21:35,418 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:21:35,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:21:35,880 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:21:35,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:35 WrapperNode [2019-11-23 21:21:35,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:21:35,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:21:35,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:21:35,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:21:35,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:35" (1/1) ... [2019-11-23 21:21:35,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:35" (1/1) ... [2019-11-23 21:21:36,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:21:36,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:21:36,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:21:36,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:21:36,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:35" (1/1) ... [2019-11-23 21:21:36,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:35" (1/1) ... [2019-11-23 21:21:36,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:35" (1/1) ... [2019-11-23 21:21:36,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:35" (1/1) ... [2019-11-23 21:21:36,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:35" (1/1) ... [2019-11-23 21:21:36,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:35" (1/1) ... [2019-11-23 21:21:36,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:35" (1/1) ... [2019-11-23 21:21:36,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:21:36,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:21:36,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:21:36,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:21:36,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:35" (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 21:21:36,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:21:36,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:21:40,422 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:21:40,423 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:21:40,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:40 BoogieIcfgContainer [2019-11-23 21:21:40,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:21:40,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:21:40,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:21:40,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:21:40,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:21:33" (1/3) ... [2019-11-23 21:21:40,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81b7c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:21:40, skipping insertion in model container [2019-11-23 21:21:40,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:35" (2/3) ... [2019-11-23 21:21:40,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81b7c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:21:40, skipping insertion in model container [2019-11-23 21:21:40,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:40" (3/3) ... [2019-11-23 21:21:40,433 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label12.c [2019-11-23 21:21:40,444 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:21:40,453 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:21:40,466 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:21:40,503 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:21:40,503 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:21:40,503 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:21:40,503 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:21:40,504 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:21:40,504 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:21:40,504 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:21:40,504 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:21:40,538 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:21:40,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 21:21:40,545 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:21:40,546 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 21:21:40,547 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:21:40,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:21:40,554 INFO L82 PathProgramCache]: Analyzing trace with hash 156847385, now seen corresponding path program 1 times [2019-11-23 21:21:40,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:21:40,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91020644] [2019-11-23 21:21:40,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:21:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:21:40,778 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 21:21:40,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91020644] [2019-11-23 21:21:40,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:21:40,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:21:40,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933639835] [2019-11-23 21:21:40,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:21:40,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:21:40,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:21:40,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:21:40,805 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:21:47,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:21:47,797 INFO L93 Difference]: Finished difference Result 2914 states and 5662 transitions. [2019-11-23 21:21:47,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:21:47,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-23 21:21:47,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:21:47,831 INFO L225 Difference]: With dead ends: 2914 [2019-11-23 21:21:47,832 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:21:47,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:21:47,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:21:47,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-23 21:21:47,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:21:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3262 transitions. [2019-11-23 21:21:47,997 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3262 transitions. Word has length 17 [2019-11-23 21:21:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:21:47,998 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3262 transitions. [2019-11-23 21:21:47,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:21:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3262 transitions. [2019-11-23 21:21:48,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 21:21:48,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:21:48,001 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:21:48,001 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:21:48,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:21:48,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1277599882, now seen corresponding path program 1 times [2019-11-23 21:21:48,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:21:48,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81164973] [2019-11-23 21:21:48,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:21:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:21:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:21:48,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81164973] [2019-11-23 21:21:48,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:21:48,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:21:48,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096206202] [2019-11-23 21:21:48,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:21:48,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:21:48,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:21:48,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:21:48,210 INFO L87 Difference]: Start difference. First operand 2074 states and 3262 transitions. Second operand 4 states. [2019-11-23 21:21:52,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:21:52,196 INFO L93 Difference]: Finished difference Result 6216 states and 9781 transitions. [2019-11-23 21:21:52,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:21:52,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2019-11-23 21:21:52,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:21:52,219 INFO L225 Difference]: With dead ends: 6216 [2019-11-23 21:21:52,219 INFO L226 Difference]: Without dead ends: 4144 [2019-11-23 21:21:52,224 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:21:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2019-11-23 21:21:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2019-11-23 21:21:52,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4144 states. [2019-11-23 21:21:52,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5537 transitions. [2019-11-23 21:21:52,303 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5537 transitions. Word has length 82 [2019-11-23 21:21:52,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:21:52,304 INFO L462 AbstractCegarLoop]: Abstraction has 4144 states and 5537 transitions. [2019-11-23 21:21:52,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:21:52,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5537 transitions. [2019-11-23 21:21:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-11-23 21:21:52,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:21:52,319 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:21:52,320 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:21:52,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:21:52,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1639405966, now seen corresponding path program 1 times [2019-11-23 21:21:52,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:21:52,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619313256] [2019-11-23 21:21:52,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:21:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:21:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 21:21:52,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619313256] [2019-11-23 21:21:52,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:21:52,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:21:52,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209169682] [2019-11-23 21:21:52,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:21:52,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:21:52,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:21:52,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:21:52,930 INFO L87 Difference]: Start difference. First operand 4144 states and 5537 transitions. Second operand 5 states. [2019-11-23 21:21:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:21:59,350 INFO L93 Difference]: Finished difference Result 13806 states and 18082 transitions. [2019-11-23 21:21:59,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:21:59,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 200 [2019-11-23 21:21:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:21:59,389 INFO L225 Difference]: With dead ends: 13806 [2019-11-23 21:21:59,389 INFO L226 Difference]: Without dead ends: 9664 [2019-11-23 21:21:59,394 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:21:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2019-11-23 21:21:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 8974. [2019-11-23 21:21:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8974 states. [2019-11-23 21:21:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10715 transitions. [2019-11-23 21:21:59,542 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10715 transitions. Word has length 200 [2019-11-23 21:21:59,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:21:59,543 INFO L462 AbstractCegarLoop]: Abstraction has 8974 states and 10715 transitions. [2019-11-23 21:21:59,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:21:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10715 transitions. [2019-11-23 21:21:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2019-11-23 21:21:59,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:21:59,552 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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 21:21:59,552 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:21:59,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:21:59,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1000064582, now seen corresponding path program 1 times [2019-11-23 21:21:59,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:21:59,553 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606318273] [2019-11-23 21:21:59,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:21:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 258 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-23 21:22:00,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606318273] [2019-11-23 21:22:00,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902423008] [2019-11-23 21:22:00,164 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 21:22:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:00,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:22:00,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:22:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 21:22:00,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:22:00,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:22:00,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626080002] [2019-11-23 21:22:00,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:00,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:00,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:00,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:00,524 INFO L87 Difference]: Start difference. First operand 8974 states and 10715 transitions. Second operand 3 states. [2019-11-23 21:22:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:04,177 INFO L93 Difference]: Finished difference Result 22086 states and 27009 transitions. [2019-11-23 21:22:04,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:04,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 382 [2019-11-23 21:22:04,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:04,232 INFO L225 Difference]: With dead ends: 22086 [2019-11-23 21:22:04,232 INFO L226 Difference]: Without dead ends: 13114 [2019-11-23 21:22:04,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 381 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13114 states. [2019-11-23 21:22:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13114 to 13114. [2019-11-23 21:22:04,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13114 states. [2019-11-23 21:22:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13114 states to 13114 states and 15840 transitions. [2019-11-23 21:22:04,502 INFO L78 Accepts]: Start accepts. Automaton has 13114 states and 15840 transitions. Word has length 382 [2019-11-23 21:22:04,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:04,504 INFO L462 AbstractCegarLoop]: Abstraction has 13114 states and 15840 transitions. [2019-11-23 21:22:04,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:04,505 INFO L276 IsEmpty]: Start isEmpty. Operand 13114 states and 15840 transitions. [2019-11-23 21:22:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2019-11-23 21:22:04,514 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:04,515 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 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, 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, 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 21:22:04,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:22:04,720 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:04,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:04,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1192881415, now seen corresponding path program 1 times [2019-11-23 21:22:04,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:04,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387900848] [2019-11-23 21:22:04,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 21:22:05,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387900848] [2019-11-23 21:22:05,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:05,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:05,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423466375] [2019-11-23 21:22:05,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:05,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:05,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:05,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:05,091 INFO L87 Difference]: Start difference. First operand 13114 states and 15840 transitions. Second operand 4 states. [2019-11-23 21:22:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:11,605 INFO L93 Difference]: Finished difference Result 46236 states and 56656 transitions. [2019-11-23 21:22:11,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:11,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 388 [2019-11-23 21:22:11,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:11,683 INFO L225 Difference]: With dead ends: 46236 [2019-11-23 21:22:11,683 INFO L226 Difference]: Without dead ends: 33124 [2019-11-23 21:22:11,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:11,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33124 states. [2019-11-23 21:22:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33124 to 28984. [2019-11-23 21:22:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28984 states. [2019-11-23 21:22:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28984 states to 28984 states and 34782 transitions. [2019-11-23 21:22:13,166 INFO L78 Accepts]: Start accepts. Automaton has 28984 states and 34782 transitions. Word has length 388 [2019-11-23 21:22:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:13,167 INFO L462 AbstractCegarLoop]: Abstraction has 28984 states and 34782 transitions. [2019-11-23 21:22:13,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 28984 states and 34782 transitions. [2019-11-23 21:22:13,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2019-11-23 21:22:13,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:13,182 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1] [2019-11-23 21:22:13,182 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:13,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:13,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2111473149, now seen corresponding path program 1 times [2019-11-23 21:22:13,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:13,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954253344] [2019-11-23 21:22:13,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 509 proven. 3 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2019-11-23 21:22:13,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954253344] [2019-11-23 21:22:13,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60151930] [2019-11-23 21:22:13,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:22:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:13,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:22:13,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:22:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 611 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2019-11-23 21:22:14,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:22:14,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:22:14,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643461367] [2019-11-23 21:22:14,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:14,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:14,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:14,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:14,185 INFO L87 Difference]: Start difference. First operand 28984 states and 34782 transitions. Second operand 3 states. [2019-11-23 21:22:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:17,978 INFO L93 Difference]: Finished difference Result 72456 states and 88705 transitions. [2019-11-23 21:22:17,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:17,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 533 [2019-11-23 21:22:17,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:18,032 INFO L225 Difference]: With dead ends: 72456 [2019-11-23 21:22:18,033 INFO L226 Difference]: Without dead ends: 40024 [2019-11-23 21:22:18,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 532 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:18,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40024 states. [2019-11-23 21:22:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40024 to 37954. [2019-11-23 21:22:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37954 states. [2019-11-23 21:22:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37954 states to 37954 states and 40919 transitions. [2019-11-23 21:22:18,532 INFO L78 Accepts]: Start accepts. Automaton has 37954 states and 40919 transitions. Word has length 533 [2019-11-23 21:22:18,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:18,533 INFO L462 AbstractCegarLoop]: Abstraction has 37954 states and 40919 transitions. [2019-11-23 21:22:18,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:18,533 INFO L276 IsEmpty]: Start isEmpty. Operand 37954 states and 40919 transitions. [2019-11-23 21:22:18,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2019-11-23 21:22:18,561 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:18,562 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:22:18,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:22:18,774 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:18,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:18,774 INFO L82 PathProgramCache]: Analyzing trace with hash 777413764, now seen corresponding path program 1 times [2019-11-23 21:22:18,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:18,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329821791] [2019-11-23 21:22:18,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-23 21:22:19,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329821791] [2019-11-23 21:22:19,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:19,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:22:19,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722751211] [2019-11-23 21:22:19,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:19,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:19,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:19,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:22:19,429 INFO L87 Difference]: Start difference. First operand 37954 states and 40919 transitions. Second operand 3 states. [2019-11-23 21:22:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:22,316 INFO L93 Difference]: Finished difference Result 75906 states and 81836 transitions. [2019-11-23 21:22:22,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:22,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 562 [2019-11-23 21:22:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:22,360 INFO L225 Difference]: With dead ends: 75906 [2019-11-23 21:22:22,360 INFO L226 Difference]: Without dead ends: 37954 [2019-11-23 21:22:22,385 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 2 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 21:22:22,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37954 states. [2019-11-23 21:22:22,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37954 to 37264. [2019-11-23 21:22:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37264 states. [2019-11-23 21:22:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37264 states to 37264 states and 39771 transitions. [2019-11-23 21:22:22,994 INFO L78 Accepts]: Start accepts. Automaton has 37264 states and 39771 transitions. Word has length 562 [2019-11-23 21:22:22,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:22,995 INFO L462 AbstractCegarLoop]: Abstraction has 37264 states and 39771 transitions. [2019-11-23 21:22:22,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 37264 states and 39771 transitions. [2019-11-23 21:22:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2019-11-23 21:22:23,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:23,016 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:22:23,016 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:23,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:23,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1940410172, now seen corresponding path program 1 times [2019-11-23 21:22:23,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:23,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651060835] [2019-11-23 21:22:23,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 617 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 21:22:23,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651060835] [2019-11-23 21:22:23,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:23,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:23,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902376487] [2019-11-23 21:22:23,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:23,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:23,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:23,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:23,575 INFO L87 Difference]: Start difference. First operand 37264 states and 39771 transitions. Second operand 4 states. [2019-11-23 21:22:28,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:28,119 INFO L93 Difference]: Finished difference Result 88326 states and 95182 transitions. [2019-11-23 21:22:28,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:28,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 625 [2019-11-23 21:22:28,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:28,162 INFO L225 Difference]: With dead ends: 88326 [2019-11-23 21:22:28,162 INFO L226 Difference]: Without dead ends: 51064 [2019-11-23 21:22:28,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51064 states. [2019-11-23 21:22:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51064 to 50374. [2019-11-23 21:22:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50374 states. [2019-11-23 21:22:28,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50374 states to 50374 states and 53195 transitions. [2019-11-23 21:22:28,627 INFO L78 Accepts]: Start accepts. Automaton has 50374 states and 53195 transitions. Word has length 625 [2019-11-23 21:22:28,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:28,628 INFO L462 AbstractCegarLoop]: Abstraction has 50374 states and 53195 transitions. [2019-11-23 21:22:28,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:28,628 INFO L276 IsEmpty]: Start isEmpty. Operand 50374 states and 53195 transitions. [2019-11-23 21:22:28,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2019-11-23 21:22:28,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:28,637 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 1, 1, 1, 1] [2019-11-23 21:22:28,637 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:28,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:28,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1441596635, now seen corresponding path program 1 times [2019-11-23 21:22:28,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:28,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743599442] [2019-11-23 21:22:28,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 495 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 21:22:30,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743599442] [2019-11-23 21:22:30,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:30,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:30,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557926214] [2019-11-23 21:22:30,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:30,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:30,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:30,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:30,304 INFO L87 Difference]: Start difference. First operand 50374 states and 53195 transitions. Second operand 4 states. [2019-11-23 21:22:34,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:34,757 INFO L93 Difference]: Finished difference Result 126966 states and 134909 transitions. [2019-11-23 21:22:34,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:34,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 650 [2019-11-23 21:22:34,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:34,815 INFO L225 Difference]: With dead ends: 126966 [2019-11-23 21:22:34,815 INFO L226 Difference]: Without dead ends: 76594 [2019-11-23 21:22:34,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:34,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76594 states. [2019-11-23 21:22:35,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76594 to 75214. [2019-11-23 21:22:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75214 states. [2019-11-23 21:22:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75214 states to 75214 states and 79378 transitions. [2019-11-23 21:22:35,430 INFO L78 Accepts]: Start accepts. Automaton has 75214 states and 79378 transitions. Word has length 650 [2019-11-23 21:22:35,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:35,431 INFO L462 AbstractCegarLoop]: Abstraction has 75214 states and 79378 transitions. [2019-11-23 21:22:35,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 75214 states and 79378 transitions. [2019-11-23 21:22:35,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1287 [2019-11-23 21:22:35,451 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:35,452 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:22:35,452 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:35,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:35,453 INFO L82 PathProgramCache]: Analyzing trace with hash 829674709, now seen corresponding path program 1 times [2019-11-23 21:22:35,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:35,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221708753] [2019-11-23 21:22:35,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2053 backedges. 521 proven. 0 refuted. 0 times theorem prover too weak. 1532 trivial. 0 not checked. [2019-11-23 21:22:37,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221708753] [2019-11-23 21:22:37,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:37,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:37,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254562665] [2019-11-23 21:22:37,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:37,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:37,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:37,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:37,006 INFO L87 Difference]: Start difference. First operand 75214 states and 79378 transitions. Second operand 4 states. [2019-11-23 21:22:41,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:41,929 INFO L93 Difference]: Finished difference Result 170436 states and 180241 transitions. [2019-11-23 21:22:41,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:41,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1286 [2019-11-23 21:22:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:42,013 INFO L225 Difference]: With dead ends: 170436 [2019-11-23 21:22:42,014 INFO L226 Difference]: Without dead ends: 95914 [2019-11-23 21:22:42,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:42,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95914 states. [2019-11-23 21:22:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95914 to 89704. [2019-11-23 21:22:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89704 states. [2019-11-23 21:22:42,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89704 states to 89704 states and 94209 transitions. [2019-11-23 21:22:42,840 INFO L78 Accepts]: Start accepts. Automaton has 89704 states and 94209 transitions. Word has length 1286 [2019-11-23 21:22:42,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:42,841 INFO L462 AbstractCegarLoop]: Abstraction has 89704 states and 94209 transitions. [2019-11-23 21:22:42,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:42,841 INFO L276 IsEmpty]: Start isEmpty. Operand 89704 states and 94209 transitions. [2019-11-23 21:22:42,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1328 [2019-11-23 21:22:42,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:42,867 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:22:42,867 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:42,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:42,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1974756955, now seen corresponding path program 1 times [2019-11-23 21:22:42,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:42,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982296942] [2019-11-23 21:22:42,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2173 backedges. 926 proven. 719 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2019-11-23 21:22:47,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982296942] [2019-11-23 21:22:47,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614382796] [2019-11-23 21:22:47,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:22:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:48,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:22:48,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:22:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2173 backedges. 1059 proven. 0 refuted. 0 times theorem prover too weak. 1114 trivial. 0 not checked. [2019-11-23 21:22:49,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:22:49,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2019-11-23 21:22:49,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633978290] [2019-11-23 21:22:49,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:49,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:49,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:49,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:22:49,720 INFO L87 Difference]: Start difference. First operand 89704 states and 94209 transitions. Second operand 3 states.