/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_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:21:45,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:21:45,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:21:45,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 21:21:45,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 21:21:45,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 21:21:45,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 21:21:45,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 21:21:45,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 21:21:45,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 21:21:45,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 21:21:45,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 21:21:45,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:21:45,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:21:45,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:21:45,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:21:45,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:21:45,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:21:45,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:21:45,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:21:45,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:21:45,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:21:45,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:21:45,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:21:45,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:21:45,760 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 21:21:45,774 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:21:45,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:21:45,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:21:45,777 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:21:45,777 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:21:45,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:21:45,777 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:21:45,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:21:45,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:21:45,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:21:45,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:21:45,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:21:45,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:21:45,779 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:21:45,779 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:21:45,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:21:45,781 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:21:45,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:21:45,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:21:45,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:21:45,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:21:45,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:21:45,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:21:45,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:21:45,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:21:45,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:21:45,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:21:45,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:21:45,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:21:45,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:21:46,059 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:21:46,077 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:21:46,082 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:21:46,083 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:21:46,083 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:21:46,084 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label17.c [2019-11-23 21:21:46,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aae5d58b/687fae238a3f4b66838cb600b25b2934/FLAGbe3000715 [2019-11-23 21:21:46,865 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:21:46,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label17.c [2019-11-23 21:21:46,888 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aae5d58b/687fae238a3f4b66838cb600b25b2934/FLAGbe3000715 [2019-11-23 21:21:47,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aae5d58b/687fae238a3f4b66838cb600b25b2934 [2019-11-23 21:21:47,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:21:47,064 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:21:47,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:21:47,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:21:47,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:21:47,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:21:47" (1/1) ... [2019-11-23 21:21:47,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67690949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:47, skipping insertion in model container [2019-11-23 21:21:47,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:21:47" (1/1) ... [2019-11-23 21:21:47,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:21:47,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:21:48,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:21:48,682 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:21:49,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:21:49,272 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:21:49,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:49 WrapperNode [2019-11-23 21:21:49,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:21:49,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:21:49,273 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:21:49,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:21:49,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:49" (1/1) ... [2019-11-23 21:21:49,327 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:49" (1/1) ... [2019-11-23 21:21:49,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:21:49,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:21:49,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:21:49,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:21:49,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:49" (1/1) ... [2019-11-23 21:21:49,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:49" (1/1) ... [2019-11-23 21:21:49,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:49" (1/1) ... [2019-11-23 21:21:49,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:49" (1/1) ... [2019-11-23 21:21:49,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:49" (1/1) ... [2019-11-23 21:21:49,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:49" (1/1) ... [2019-11-23 21:21:49,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:49" (1/1) ... [2019-11-23 21:21:49,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:21:49,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:21:49,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:21:49,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:21:49,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:49" (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 21:21:49,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:21:49,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:21:53,970 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:21:53,970 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:21:53,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:53 BoogieIcfgContainer [2019-11-23 21:21:53,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:21:53,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:21:53,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:21:53,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:21:53,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:21:47" (1/3) ... [2019-11-23 21:21:53,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c1b0f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:21:53, skipping insertion in model container [2019-11-23 21:21:53,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:21:49" (2/3) ... [2019-11-23 21:21:53,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c1b0f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:21:53, skipping insertion in model container [2019-11-23 21:21:53,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:21:53" (3/3) ... [2019-11-23 21:21:53,981 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label17.c [2019-11-23 21:21:53,992 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:21:54,001 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:21:54,013 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:21:54,057 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:21:54,057 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:21:54,057 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:21:54,058 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:21:54,058 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:21:54,059 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:21:54,059 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:21:54,059 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:21:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:21:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 21:21:54,103 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:21:54,105 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, 1, 1, 1, 1] [2019-11-23 21:21:54,105 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:21:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:21:54,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1843609039, now seen corresponding path program 1 times [2019-11-23 21:21:54,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:21:54,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852062661] [2019-11-23 21:21:54,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:21:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:21:54,376 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 21:21:54,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852062661] [2019-11-23 21:21:54,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:21:54,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:21:54,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043074470] [2019-11-23 21:21:54,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:21:54,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:21:54,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:21:54,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:21:54,403 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:22:01,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:01,778 INFO L93 Difference]: Finished difference Result 2914 states and 5662 transitions. [2019-11-23 21:22:01,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:01,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-11-23 21:22:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:01,838 INFO L225 Difference]: With dead ends: 2914 [2019-11-23 21:22:01,839 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:22:01,854 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 21:22:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:22:02,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-23 21:22:02,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:22:02,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3418 transitions. [2019-11-23 21:22:02,057 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3418 transitions. Word has length 31 [2019-11-23 21:22:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:02,058 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3418 transitions. [2019-11-23 21:22:02,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:02,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3418 transitions. [2019-11-23 21:22:02,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 21:22:02,063 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:02,063 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2019-11-23 21:22:02,064 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:02,064 INFO L82 PathProgramCache]: Analyzing trace with hash -726089534, now seen corresponding path program 1 times [2019-11-23 21:22:02,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:02,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095807300] [2019-11-23 21:22:02,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:22:02,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095807300] [2019-11-23 21:22:02,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:02,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:22:02,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319902883] [2019-11-23 21:22:02,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:02,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:02,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:02,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:02,216 INFO L87 Difference]: Start difference. First operand 2074 states and 3418 transitions. Second operand 4 states. [2019-11-23 21:22:07,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:07,058 INFO L93 Difference]: Finished difference Result 6216 states and 10249 transitions. [2019-11-23 21:22:07,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:07,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2019-11-23 21:22:07,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:07,079 INFO L225 Difference]: With dead ends: 6216 [2019-11-23 21:22:07,080 INFO L226 Difference]: Without dead ends: 4144 [2019-11-23 21:22:07,083 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 21:22:07,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2019-11-23 21:22:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2019-11-23 21:22:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4144 states. [2019-11-23 21:22:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5717 transitions. [2019-11-23 21:22:07,166 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5717 transitions. Word has length 96 [2019-11-23 21:22:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:07,167 INFO L462 AbstractCegarLoop]: Abstraction has 4144 states and 5717 transitions. [2019-11-23 21:22:07,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:07,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5717 transitions. [2019-11-23 21:22:07,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-23 21:22:07,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:07,171 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:07,171 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:07,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:07,172 INFO L82 PathProgramCache]: Analyzing trace with hash -86970998, now seen corresponding path program 1 times [2019-11-23 21:22:07,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:07,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326492010] [2019-11-23 21:22:07,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-23 21:22:07,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326492010] [2019-11-23 21:22:07,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:07,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:07,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197734867] [2019-11-23 21:22:07,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:22:07,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:07,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:22:07,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:22:07,693 INFO L87 Difference]: Start difference. First operand 4144 states and 5717 transitions. Second operand 5 states. [2019-11-23 21:22:13,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:13,504 INFO L93 Difference]: Finished difference Result 11736 states and 15752 transitions. [2019-11-23 21:22:13,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:13,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2019-11-23 21:22:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:13,539 INFO L225 Difference]: With dead ends: 11736 [2019-11-23 21:22:13,539 INFO L226 Difference]: Without dead ends: 7594 [2019-11-23 21:22:13,545 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 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 21:22:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2019-11-23 21:22:13,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 6904. [2019-11-23 21:22:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6904 states. [2019-11-23 21:22:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 8699 transitions. [2019-11-23 21:22:13,667 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 8699 transitions. Word has length 214 [2019-11-23 21:22:13,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:13,667 INFO L462 AbstractCegarLoop]: Abstraction has 6904 states and 8699 transitions. [2019-11-23 21:22:13,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:22:13,668 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 8699 transitions. [2019-11-23 21:22:13,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2019-11-23 21:22:13,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:13,674 INFO L410 BasicCegarLoop]: trace histogram [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, 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 21:22:13,674 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:13,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:13,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1795119026, now seen corresponding path program 1 times [2019-11-23 21:22:13,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:13,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853741509] [2019-11-23 21:22:13,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 286 proven. 3 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-23 21:22:14,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853741509] [2019-11-23 21:22:14,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106462115] [2019-11-23 21:22:14,260 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 21:22:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:14,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:22:14,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:22:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 21:22:14,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:22:14,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:22:14,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264645681] [2019-11-23 21:22:14,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:14,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:14,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:14,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:14,657 INFO L87 Difference]: Start difference. First operand 6904 states and 8699 transitions. Second operand 3 states. [2019-11-23 21:22:18,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:18,648 INFO L93 Difference]: Finished difference Result 17256 states and 22359 transitions. [2019-11-23 21:22:18,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:18,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 396 [2019-11-23 21:22:18,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:18,689 INFO L225 Difference]: With dead ends: 17256 [2019-11-23 21:22:18,689 INFO L226 Difference]: Without dead ends: 10354 [2019-11-23 21:22:18,698 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 395 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 21:22:18,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10354 states. [2019-11-23 21:22:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10354 to 10354. [2019-11-23 21:22:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10354 states. [2019-11-23 21:22:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10354 states to 10354 states and 13164 transitions. [2019-11-23 21:22:18,881 INFO L78 Accepts]: Start accepts. Automaton has 10354 states and 13164 transitions. Word has length 396 [2019-11-23 21:22:18,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:18,882 INFO L462 AbstractCegarLoop]: Abstraction has 10354 states and 13164 transitions. [2019-11-23 21:22:18,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:18,882 INFO L276 IsEmpty]: Start isEmpty. Operand 10354 states and 13164 transitions. [2019-11-23 21:22:18,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2019-11-23 21:22:18,895 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:18,895 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:19,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:22:19,101 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:19,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1757836271, now seen corresponding path program 1 times [2019-11-23 21:22:19,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:19,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579956496] [2019-11-23 21:22:19,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 21:22:19,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579956496] [2019-11-23 21:22:19,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172388762] [2019-11-23 21:22:19,587 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 21:22:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:19,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:22:19,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:22:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 21:22:19,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:22:19,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2019-11-23 21:22:19,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875258755] [2019-11-23 21:22:19,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:19,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:19,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:22:19,882 INFO L87 Difference]: Start difference. First operand 10354 states and 13164 transitions. Second operand 3 states. [2019-11-23 21:22:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:23,556 INFO L93 Difference]: Finished difference Result 29676 states and 37987 transitions. [2019-11-23 21:22:23,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:23,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 402 [2019-11-23 21:22:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:23,612 INFO L225 Difference]: With dead ends: 29676 [2019-11-23 21:22:23,612 INFO L226 Difference]: Without dead ends: 19324 [2019-11-23 21:22:23,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 402 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:22:23,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19324 states. [2019-11-23 21:22:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19324 to 18634. [2019-11-23 21:22:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18634 states. [2019-11-23 21:22:23,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18634 states to 18634 states and 23568 transitions. [2019-11-23 21:22:23,881 INFO L78 Accepts]: Start accepts. Automaton has 18634 states and 23568 transitions. Word has length 402 [2019-11-23 21:22:23,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:23,882 INFO L462 AbstractCegarLoop]: Abstraction has 18634 states and 23568 transitions. [2019-11-23 21:22:23,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:23,882 INFO L276 IsEmpty]: Start isEmpty. Operand 18634 states and 23568 transitions. [2019-11-23 21:22:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2019-11-23 21:22:23,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:23,891 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:24,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:22:24,095 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:24,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:24,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1456259536, now seen corresponding path program 1 times [2019-11-23 21:22:24,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:24,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488539940] [2019-11-23 21:22:24,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-23 21:22:24,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488539940] [2019-11-23 21:22:24,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:24,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:24,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161805800] [2019-11-23 21:22:24,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:24,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:24,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:24,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:24,483 INFO L87 Difference]: Start difference. First operand 18634 states and 23568 transitions. Second operand 4 states. [2019-11-23 21:22:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:30,388 INFO L93 Difference]: Finished difference Result 55896 states and 71647 transitions. [2019-11-23 21:22:30,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:30,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 437 [2019-11-23 21:22:30,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:30,474 INFO L225 Difference]: With dead ends: 55896 [2019-11-23 21:22:30,474 INFO L226 Difference]: Without dead ends: 37264 [2019-11-23 21:22:30,499 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 21:22:30,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37264 states. [2019-11-23 21:22:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37264 to 34504. [2019-11-23 21:22:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34504 states. [2019-11-23 21:22:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34504 states to 34504 states and 43325 transitions. [2019-11-23 21:22:31,052 INFO L78 Accepts]: Start accepts. Automaton has 34504 states and 43325 transitions. Word has length 437 [2019-11-23 21:22:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:31,054 INFO L462 AbstractCegarLoop]: Abstraction has 34504 states and 43325 transitions. [2019-11-23 21:22:31,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:31,054 INFO L276 IsEmpty]: Start isEmpty. Operand 34504 states and 43325 transitions. [2019-11-23 21:22:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2019-11-23 21:22:31,080 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:31,089 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 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, 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 21:22:31,090 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:31,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1870141500, now seen corresponding path program 1 times [2019-11-23 21:22:31,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:31,092 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768970891] [2019-11-23 21:22:31,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 522 proven. 3 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-11-23 21:22:32,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768970891] [2019-11-23 21:22:32,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405929011] [2019-11-23 21:22:32,872 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 21:22:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:33,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:22:33,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:22:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 591 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 21:22:33,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:22:33,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:22:33,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473220712] [2019-11-23 21:22:33,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:33,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:33,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:33,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:22:33,435 INFO L87 Difference]: Start difference. First operand 34504 states and 43325 transitions. Second operand 3 states. [2019-11-23 21:22:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:37,072 INFO L93 Difference]: Finished difference Result 71766 states and 89678 transitions. [2019-11-23 21:22:37,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:37,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 598 [2019-11-23 21:22:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:37,138 INFO L225 Difference]: With dead ends: 71766 [2019-11-23 21:22:37,138 INFO L226 Difference]: Without dead ends: 33814 [2019-11-23 21:22:37,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 597 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 21:22:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33814 states. [2019-11-23 21:22:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33814 to 32434. [2019-11-23 21:22:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32434 states. [2019-11-23 21:22:37,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32434 states to 32434 states and 34844 transitions. [2019-11-23 21:22:37,775 INFO L78 Accepts]: Start accepts. Automaton has 32434 states and 34844 transitions. Word has length 598 [2019-11-23 21:22:37,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:37,775 INFO L462 AbstractCegarLoop]: Abstraction has 32434 states and 34844 transitions. [2019-11-23 21:22:37,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:37,776 INFO L276 IsEmpty]: Start isEmpty. Operand 32434 states and 34844 transitions. [2019-11-23 21:22:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2019-11-23 21:22:37,789 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:37,790 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:22:37,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:22:37,995 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:37,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:37,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1813723887, now seen corresponding path program 1 times [2019-11-23 21:22:37,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:37,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207988017] [2019-11-23 21:22:37,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 623 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-23 21:22:38,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207988017] [2019-11-23 21:22:38,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:38,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:38,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653162987] [2019-11-23 21:22:38,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:38,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:38,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:38,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:38,449 INFO L87 Difference]: Start difference. First operand 32434 states and 34844 transitions. Second operand 4 states. [2019-11-23 21:22:43,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:43,518 INFO L93 Difference]: Finished difference Result 77286 states and 83293 transitions. [2019-11-23 21:22:43,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:43,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 699 [2019-11-23 21:22:43,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:43,618 INFO L225 Difference]: With dead ends: 77286 [2019-11-23 21:22:43,618 INFO L226 Difference]: Without dead ends: 44854 [2019-11-23 21:22:43,641 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 21:22:43,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44854 states. [2019-11-23 21:22:44,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44854 to 42094. [2019-11-23 21:22:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42094 states. [2019-11-23 21:22:44,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42094 states to 42094 states and 44537 transitions. [2019-11-23 21:22:44,137 INFO L78 Accepts]: Start accepts. Automaton has 42094 states and 44537 transitions. Word has length 699 [2019-11-23 21:22:44,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:44,138 INFO L462 AbstractCegarLoop]: Abstraction has 42094 states and 44537 transitions. [2019-11-23 21:22:44,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:44,138 INFO L276 IsEmpty]: Start isEmpty. Operand 42094 states and 44537 transitions. [2019-11-23 21:22:44,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 719 [2019-11-23 21:22:44,164 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:44,166 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:44,166 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:44,167 INFO L82 PathProgramCache]: Analyzing trace with hash -2081902839, now seen corresponding path program 1 times [2019-11-23 21:22:44,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:44,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711173504] [2019-11-23 21:22:44,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 122 proven. 569 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-11-23 21:22:45,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711173504] [2019-11-23 21:22:45,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942277112] [2019-11-23 21:22:45,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:22:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:45,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:22:45,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:22:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2019-11-23 21:22:45,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:22:45,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2019-11-23 21:22:45,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594984533] [2019-11-23 21:22:45,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:22:45,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:45,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:22:45,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:22:45,706 INFO L87 Difference]: Start difference. First operand 42094 states and 44537 transitions. Second operand 3 states. [2019-11-23 21:22:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:48,470 INFO L93 Difference]: Finished difference Result 84186 states and 89072 transitions. [2019-11-23 21:22:48,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:22:48,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 718 [2019-11-23 21:22:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:48,519 INFO L225 Difference]: With dead ends: 84186 [2019-11-23 21:22:48,520 INFO L226 Difference]: Without dead ends: 42094 [2019-11-23 21:22:48,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 717 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:22:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42094 states. [2019-11-23 21:22:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42094 to 40024. [2019-11-23 21:22:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40024 states. [2019-11-23 21:22:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40024 states to 40024 states and 41687 transitions. [2019-11-23 21:22:49,952 INFO L78 Accepts]: Start accepts. Automaton has 40024 states and 41687 transitions. Word has length 718 [2019-11-23 21:22:49,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:49,953 INFO L462 AbstractCegarLoop]: Abstraction has 40024 states and 41687 transitions. [2019-11-23 21:22:49,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:22:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 40024 states and 41687 transitions. [2019-11-23 21:22:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 914 [2019-11-23 21:22:49,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:49,980 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:22:50,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:22:50,186 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:50,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:50,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1827729175, now seen corresponding path program 1 times [2019-11-23 21:22:50,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:50,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980908824] [2019-11-23 21:22:50,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:22:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 603 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2019-11-23 21:22:51,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980908824] [2019-11-23 21:22:51,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:22:51,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:22:51,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104493545] [2019-11-23 21:22:51,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:22:51,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:22:51,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:22:51,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:22:51,276 INFO L87 Difference]: Start difference. First operand 40024 states and 41687 transitions. Second operand 4 states. [2019-11-23 21:22:55,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:22:55,836 INFO L93 Difference]: Finished difference Result 99366 states and 104155 transitions. [2019-11-23 21:22:55,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:22:55,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 913 [2019-11-23 21:22:55,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:22:55,894 INFO L225 Difference]: With dead ends: 99366 [2019-11-23 21:22:55,894 INFO L226 Difference]: Without dead ends: 55894 [2019-11-23 21:22:55,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 5 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 21:22:55,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55894 states. [2019-11-23 21:22:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55894 to 53134. [2019-11-23 21:22:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53134 states. [2019-11-23 21:22:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53134 states to 53134 states and 55198 transitions. [2019-11-23 21:22:56,790 INFO L78 Accepts]: Start accepts. Automaton has 53134 states and 55198 transitions. Word has length 913 [2019-11-23 21:22:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:22:56,791 INFO L462 AbstractCegarLoop]: Abstraction has 53134 states and 55198 transitions. [2019-11-23 21:22:56,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:22:56,791 INFO L276 IsEmpty]: Start isEmpty. Operand 53134 states and 55198 transitions. [2019-11-23 21:22:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1183 [2019-11-23 21:22:56,831 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:22:56,831 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:56,832 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:22:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:22:56,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1657608656, now seen corresponding path program 1 times [2019-11-23 21:22:56,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:22:56,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141938184] [2019-11-23 21:22:56,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:22:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 1130 proven. 198 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2019-11-23 21:23:00,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141938184] [2019-11-23 21:23:00,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936814642] [2019-11-23 21:23:00,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:23:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:00,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:00,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 872 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2019-11-23 21:23:01,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:01,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2019-11-23 21:23:01,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104863997] [2019-11-23 21:23:01,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:01,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:01,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:01,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:23:01,405 INFO L87 Difference]: Start difference. First operand 53134 states and 55198 transitions. Second operand 3 states.