/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/Problem16_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:19:43,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:19:43,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:19:43,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:19:43,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:19:43,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:19:43,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:19:43,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:19:43,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:19:43,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:19:43,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:19:43,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:19:43,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:19:43,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:19:43,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:19:43,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:19:43,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:19:43,389 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 21:19:43,416 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:19:43,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:19:43,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:19:43,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:19:43,418 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:19:43,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:19:43,418 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:19:43,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:19:43,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:19:43,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:19:43,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:19:43,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:19:43,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:19:43,419 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:19:43,420 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:19:43,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:19:43,420 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:19:43,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:19:43,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:19:43,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:19:43,421 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:19:43,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:19:43,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:19:43,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:19:43,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:19:43,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:19:43,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:19:43,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:19:43,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:19:43,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:19:43,684 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:19:43,699 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:19:43,703 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:19:43,705 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:19:43,705 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:19:43,706 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-11-23 21:19:43,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/540384e5e/04dbcdfc51924831a920b5c64ed888a9/FLAGa657a9d38 [2019-11-23 21:19:44,444 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:19:44,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-11-23 21:19:44,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/540384e5e/04dbcdfc51924831a920b5c64ed888a9/FLAGa657a9d38 [2019-11-23 21:19:44,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/540384e5e/04dbcdfc51924831a920b5c64ed888a9 [2019-11-23 21:19:44,687 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:19:44,689 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:19:44,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:19:44,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:19:44,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:19:44,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:44" (1/1) ... [2019-11-23 21:19:44,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfce74d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:44, skipping insertion in model container [2019-11-23 21:19:44,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:44" (1/1) ... [2019-11-23 21:19:44,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:19:44,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:19:45,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:19:45,641 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:19:45,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:19:45,936 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:19:45,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:45 WrapperNode [2019-11-23 21:19:45,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:19:45,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:19:45,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:19:45,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:19:45,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:45" (1/1) ... [2019-11-23 21:19:45,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:45" (1/1) ... [2019-11-23 21:19:46,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:19:46,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:19:46,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:19:46,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:19:46,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:45" (1/1) ... [2019-11-23 21:19:46,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:45" (1/1) ... [2019-11-23 21:19:46,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:45" (1/1) ... [2019-11-23 21:19:46,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:45" (1/1) ... [2019-11-23 21:19:46,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:45" (1/1) ... [2019-11-23 21:19:46,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:45" (1/1) ... [2019-11-23 21:19:46,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:45" (1/1) ... [2019-11-23 21:19:46,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:19:46,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:19:46,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:19:46,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:19:46,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:45" (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 21:19:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:19:46,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:19:49,077 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:19:49,078 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 21:19:49,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:49 BoogieIcfgContainer [2019-11-23 21:19:49,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:19:49,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:19:49,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:19:49,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:19:49,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:19:44" (1/3) ... [2019-11-23 21:19:49,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64307025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:49, skipping insertion in model container [2019-11-23 21:19:49,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:45" (2/3) ... [2019-11-23 21:19:49,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64307025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:49, skipping insertion in model container [2019-11-23 21:19:49,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:49" (3/3) ... [2019-11-23 21:19:49,094 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label40.c [2019-11-23 21:19:49,105 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:19:49,114 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:19:49,125 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:19:49,171 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:19:49,171 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:19:49,172 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:19:49,172 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:19:49,172 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:19:49,173 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:19:49,173 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:19:49,173 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:19:49,204 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states. [2019-11-23 21:19:49,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 21:19:49,212 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:49,213 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:19:49,214 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:49,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:49,220 INFO L82 PathProgramCache]: Analyzing trace with hash -696204111, now seen corresponding path program 1 times [2019-11-23 21:19:49,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:49,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611333848] [2019-11-23 21:19:49,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:49,535 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 21:19:49,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611333848] [2019-11-23 21:19:49,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:49,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:19:49,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219299786] [2019-11-23 21:19:49,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:49,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:49,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:49,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:49,562 INFO L87 Difference]: Start difference. First operand 396 states. Second operand 4 states. [2019-11-23 21:19:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:53,345 INFO L93 Difference]: Finished difference Result 1454 states and 2762 transitions. [2019-11-23 21:19:53,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:19:53,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2019-11-23 21:19:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:53,374 INFO L225 Difference]: With dead ends: 1454 [2019-11-23 21:19:53,374 INFO L226 Difference]: Without dead ends: 991 [2019-11-23 21:19:53,380 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 21:19:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2019-11-23 21:19:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2019-11-23 21:19:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2019-11-23 21:19:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1549 transitions. [2019-11-23 21:19:53,502 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1549 transitions. Word has length 63 [2019-11-23 21:19:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:53,503 INFO L462 AbstractCegarLoop]: Abstraction has 991 states and 1549 transitions. [2019-11-23 21:19:53,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:19:53,503 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1549 transitions. [2019-11-23 21:19:53,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-11-23 21:19:53,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:53,523 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, 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, 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 21:19:53,523 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:53,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:53,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1571044727, now seen corresponding path program 1 times [2019-11-23 21:19:53,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:53,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978963437] [2019-11-23 21:19:53,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-11-23 21:19:53,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978963437] [2019-11-23 21:19:53,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:53,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:19:53,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849595555] [2019-11-23 21:19:53,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:53,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:53,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:53,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:53,848 INFO L87 Difference]: Start difference. First operand 991 states and 1549 transitions. Second operand 4 states. [2019-11-23 21:19:56,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:56,836 INFO L93 Difference]: Finished difference Result 3625 states and 5594 transitions. [2019-11-23 21:19:56,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:19:56,836 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 223 [2019-11-23 21:19:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:56,931 INFO L225 Difference]: With dead ends: 3625 [2019-11-23 21:19:56,932 INFO L226 Difference]: Without dead ends: 2636 [2019-11-23 21:19:56,939 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 21:19:56,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2019-11-23 21:19:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2636. [2019-11-23 21:19:57,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2636 states. [2019-11-23 21:19:57,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 3585 transitions. [2019-11-23 21:19:57,014 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 3585 transitions. Word has length 223 [2019-11-23 21:19:57,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:57,015 INFO L462 AbstractCegarLoop]: Abstraction has 2636 states and 3585 transitions. [2019-11-23 21:19:57,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:19:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 3585 transitions. [2019-11-23 21:19:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2019-11-23 21:19:57,020 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:57,021 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:57,021 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:57,022 INFO L82 PathProgramCache]: Analyzing trace with hash 339516116, now seen corresponding path program 1 times [2019-11-23 21:19:57,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:57,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984900226] [2019-11-23 21:19:57,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-11-23 21:19:57,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984900226] [2019-11-23 21:19:57,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:57,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 21:19:57,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112904372] [2019-11-23 21:19:57,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:19:57,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:57,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:19:57,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:19:57,424 INFO L87 Difference]: Start difference. First operand 2636 states and 3585 transitions. Second operand 3 states. [2019-11-23 21:19:59,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:59,216 INFO L93 Difference]: Finished difference Result 6915 states and 9643 transitions. [2019-11-23 21:19:59,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:19:59,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 317 [2019-11-23 21:19:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:59,244 INFO L225 Difference]: With dead ends: 6915 [2019-11-23 21:19:59,244 INFO L226 Difference]: Without dead ends: 4281 [2019-11-23 21:19:59,250 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 21:19:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2019-11-23 21:19:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4281. [2019-11-23 21:19:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4281 states. [2019-11-23 21:19:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 5616 transitions. [2019-11-23 21:19:59,376 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 5616 transitions. Word has length 317 [2019-11-23 21:19:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:59,377 INFO L462 AbstractCegarLoop]: Abstraction has 4281 states and 5616 transitions. [2019-11-23 21:19:59,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:19:59,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 5616 transitions. [2019-11-23 21:19:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2019-11-23 21:19:59,401 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:59,402 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, 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, 3, 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] [2019-11-23 21:19:59,402 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:59,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:59,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1345544856, now seen corresponding path program 1 times [2019-11-23 21:19:59,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:59,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519071505] [2019-11-23 21:19:59,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 578 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 21:20:00,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519071505] [2019-11-23 21:20:00,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:00,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:20:00,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379728189] [2019-11-23 21:20:00,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:00,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:00,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:00,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:20:00,014 INFO L87 Difference]: Start difference. First operand 4281 states and 5616 transitions. Second operand 3 states. [2019-11-23 21:20:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:02,025 INFO L93 Difference]: Finished difference Result 10534 states and 13972 transitions. [2019-11-23 21:20:02,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:02,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2019-11-23 21:20:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:02,049 INFO L225 Difference]: With dead ends: 10534 [2019-11-23 21:20:02,049 INFO L226 Difference]: Without dead ends: 5268 [2019-11-23 21:20:02,056 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 21:20:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2019-11-23 21:20:02,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 5268. [2019-11-23 21:20:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5268 states. [2019-11-23 21:20:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 5755 transitions. [2019-11-23 21:20:02,158 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 5755 transitions. Word has length 480 [2019-11-23 21:20:02,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:02,158 INFO L462 AbstractCegarLoop]: Abstraction has 5268 states and 5755 transitions. [2019-11-23 21:20:02,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:02,158 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 5755 transitions. [2019-11-23 21:20:02,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 713 [2019-11-23 21:20:02,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:02,182 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:02,182 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:02,183 INFO L82 PathProgramCache]: Analyzing trace with hash -617653683, now seen corresponding path program 1 times [2019-11-23 21:20:02,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:02,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555437329] [2019-11-23 21:20:02,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1349 backedges. 440 proven. 0 refuted. 0 times theorem prover too weak. 909 trivial. 0 not checked. [2019-11-23 21:20:02,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555437329] [2019-11-23 21:20:02,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:02,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:20:02,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991794042] [2019-11-23 21:20:02,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:20:02,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:02,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:20:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:20:02,846 INFO L87 Difference]: Start difference. First operand 5268 states and 5755 transitions. Second operand 4 states. [2019-11-23 21:20:05,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:05,095 INFO L93 Difference]: Finished difference Result 17445 states and 19089 transitions. [2019-11-23 21:20:05,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:20:05,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 712 [2019-11-23 21:20:05,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:05,144 INFO L225 Difference]: With dead ends: 17445 [2019-11-23 21:20:05,144 INFO L226 Difference]: Without dead ends: 12179 [2019-11-23 21:20:05,153 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 21:20:05,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12179 states. [2019-11-23 21:20:05,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12179 to 9216. [2019-11-23 21:20:05,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9216 states. [2019-11-23 21:20:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 10049 transitions. [2019-11-23 21:20:05,344 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 10049 transitions. Word has length 712 [2019-11-23 21:20:05,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:05,346 INFO L462 AbstractCegarLoop]: Abstraction has 9216 states and 10049 transitions. [2019-11-23 21:20:05,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:20:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 10049 transitions. [2019-11-23 21:20:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 737 [2019-11-23 21:20:05,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:05,377 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:05,378 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:05,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:05,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2035612324, now seen corresponding path program 1 times [2019-11-23 21:20:05,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:05,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984439541] [2019-11-23 21:20:05,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 991 backedges. 485 proven. 0 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-11-23 21:20:07,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984439541] [2019-11-23 21:20:07,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:07,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:20:07,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782876800] [2019-11-23 21:20:07,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:20:07,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:07,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:20:07,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:20:07,234 INFO L87 Difference]: Start difference. First operand 9216 states and 10049 transitions. Second operand 7 states. [2019-11-23 21:20:10,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:10,311 INFO L93 Difference]: Finished difference Result 18103 states and 19766 transitions. [2019-11-23 21:20:10,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:20:10,312 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 736 [2019-11-23 21:20:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:10,376 INFO L225 Difference]: With dead ends: 18103 [2019-11-23 21:20:10,377 INFO L226 Difference]: Without dead ends: 9218 [2019-11-23 21:20:10,393 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:20:10,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2019-11-23 21:20:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 9216. [2019-11-23 21:20:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9216 states. [2019-11-23 21:20:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 10048 transitions. [2019-11-23 21:20:10,577 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 10048 transitions. Word has length 736 [2019-11-23 21:20:10,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:10,578 INFO L462 AbstractCegarLoop]: Abstraction has 9216 states and 10048 transitions. [2019-11-23 21:20:10,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:20:10,579 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 10048 transitions. [2019-11-23 21:20:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2019-11-23 21:20:10,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:10,609 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, 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, 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, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:10,609 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:10,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:10,610 INFO L82 PathProgramCache]: Analyzing trace with hash 995908372, now seen corresponding path program 1 times [2019-11-23 21:20:10,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:10,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061645765] [2019-11-23 21:20:10,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 1166 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2019-11-23 21:20:12,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061645765] [2019-11-23 21:20:12,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:12,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:20:12,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403827091] [2019-11-23 21:20:12,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:20:12,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:12,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:20:12,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:20:12,108 INFO L87 Difference]: Start difference. First operand 9216 states and 10048 transitions. Second operand 4 states. [2019-11-23 21:20:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:14,015 INFO L93 Difference]: Finished difference Result 20733 states and 22574 transitions. [2019-11-23 21:20:14,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:20:14,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 851 [2019-11-23 21:20:14,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:14,036 INFO L225 Difference]: With dead ends: 20733 [2019-11-23 21:20:14,037 INFO L226 Difference]: Without dead ends: 11848 [2019-11-23 21:20:14,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 21:20:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2019-11-23 21:20:14,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 10861. [2019-11-23 21:20:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10861 states. [2019-11-23 21:20:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 11582 transitions. [2019-11-23 21:20:14,192 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 11582 transitions. Word has length 851 [2019-11-23 21:20:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:14,193 INFO L462 AbstractCegarLoop]: Abstraction has 10861 states and 11582 transitions. [2019-11-23 21:20:14,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:20:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 11582 transitions. [2019-11-23 21:20:14,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 915 [2019-11-23 21:20:14,212 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:14,213 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:20:14,214 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:14,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:14,214 INFO L82 PathProgramCache]: Analyzing trace with hash -427974438, now seen corresponding path program 1 times [2019-11-23 21:20:14,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:14,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706087867] [2019-11-23 21:20:14,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 1138 proven. 0 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-11-23 21:20:14,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706087867] [2019-11-23 21:20:14,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:14,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:20:14,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725335610] [2019-11-23 21:20:14,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:20:14,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:14,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:20:14,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:20:14,932 INFO L87 Difference]: Start difference. First operand 10861 states and 11582 transitions. Second operand 4 states. [2019-11-23 21:20:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:16,810 INFO L93 Difference]: Finished difference Result 25010 states and 26712 transitions. [2019-11-23 21:20:16,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:20:16,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 914 [2019-11-23 21:20:16,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:16,835 INFO L225 Difference]: With dead ends: 25010 [2019-11-23 21:20:16,835 INFO L226 Difference]: Without dead ends: 14480 [2019-11-23 21:20:16,847 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 21:20:16,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2019-11-23 21:20:17,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 12835. [2019-11-23 21:20:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12835 states. [2019-11-23 21:20:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13505 transitions. [2019-11-23 21:20:17,031 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13505 transitions. Word has length 914 [2019-11-23 21:20:17,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:17,032 INFO L462 AbstractCegarLoop]: Abstraction has 12835 states and 13505 transitions. [2019-11-23 21:20:17,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:20:17,032 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13505 transitions. [2019-11-23 21:20:17,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1368 [2019-11-23 21:20:17,189 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:17,190 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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] [2019-11-23 21:20:17,190 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:17,191 INFO L82 PathProgramCache]: Analyzing trace with hash -418610693, now seen corresponding path program 1 times [2019-11-23 21:20:17,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:17,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196223487] [2019-11-23 21:20:17,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3255 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 2829 trivial. 0 not checked. [2019-11-23 21:20:18,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196223487] [2019-11-23 21:20:18,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:18,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:20:18,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381457193] [2019-11-23 21:20:18,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:20:18,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:18,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:20:18,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:20:18,982 INFO L87 Difference]: Start difference. First operand 12835 states and 13505 transitions. Second operand 4 states. [2019-11-23 21:20:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:20,877 INFO L93 Difference]: Finished difference Result 25668 states and 27019 transitions. [2019-11-23 21:20:20,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:20:20,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1367 [2019-11-23 21:20:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:20,903 INFO L225 Difference]: With dead ends: 25668 [2019-11-23 21:20:20,904 INFO L226 Difference]: Without dead ends: 13164 [2019-11-23 21:20:20,916 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 21:20:20,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2019-11-23 21:20:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 11848. [2019-11-23 21:20:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11848 states. [2019-11-23 21:20:21,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12278 transitions. [2019-11-23 21:20:21,071 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12278 transitions. Word has length 1367 [2019-11-23 21:20:21,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:21,074 INFO L462 AbstractCegarLoop]: Abstraction has 11848 states and 12278 transitions. [2019-11-23 21:20:21,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:20:21,074 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12278 transitions. [2019-11-23 21:20:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1578 [2019-11-23 21:20:21,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:21,124 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 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 21:20:21,125 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:21,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1864157073, now seen corresponding path program 1 times [2019-11-23 21:20:21,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:21,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984287424] [2019-11-23 21:20:21,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3110 proven. 0 refuted. 0 times theorem prover too weak. 1405 trivial. 0 not checked. [2019-11-23 21:20:24,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984287424] [2019-11-23 21:20:24,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:20:24,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:20:24,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996749625] [2019-11-23 21:20:24,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 21:20:24,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:24,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 21:20:24,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:20:24,454 INFO L87 Difference]: Start difference. First operand 11848 states and 12278 transitions. Second operand 6 states. [2019-11-23 21:20:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:27,140 INFO L93 Difference]: Finished difference Result 24032 states and 24903 transitions. [2019-11-23 21:20:27,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 21:20:27,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1577 [2019-11-23 21:20:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:27,161 INFO L225 Difference]: With dead ends: 24032 [2019-11-23 21:20:27,161 INFO L226 Difference]: Without dead ends: 12515 [2019-11-23 21:20:27,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:20:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12515 states. [2019-11-23 21:20:27,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12515 to 12177. [2019-11-23 21:20:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12177 states. [2019-11-23 21:20:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12177 states to 12177 states and 12610 transitions. [2019-11-23 21:20:27,315 INFO L78 Accepts]: Start accepts. Automaton has 12177 states and 12610 transitions. Word has length 1577 [2019-11-23 21:20:27,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:27,319 INFO L462 AbstractCegarLoop]: Abstraction has 12177 states and 12610 transitions. [2019-11-23 21:20:27,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 21:20:27,319 INFO L276 IsEmpty]: Start isEmpty. Operand 12177 states and 12610 transitions. [2019-11-23 21:20:27,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1620 [2019-11-23 21:20:27,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:27,374 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:27,374 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:27,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:27,375 INFO L82 PathProgramCache]: Analyzing trace with hash -955905345, now seen corresponding path program 1 times [2019-11-23 21:20:27,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:27,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373153509] [2019-11-23 21:20:27,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4442 backedges. 2220 proven. 549 refuted. 0 times theorem prover too weak. 1673 trivial. 0 not checked. [2019-11-23 21:20:30,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373153509] [2019-11-23 21:20:30,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922329126] [2019-11-23 21:20:30,855 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 21:20:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:31,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:20:31,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:20:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4442 backedges. 2552 proven. 0 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2019-11-23 21:20:32,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:20:32,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-23 21:20:32,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744789542] [2019-11-23 21:20:32,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:32,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:32,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:32,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:20:32,890 INFO L87 Difference]: Start difference. First operand 12177 states and 12610 transitions. Second operand 3 states. [2019-11-23 21:20:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:34,155 INFO L93 Difference]: Finished difference Result 24023 states and 24887 transitions. [2019-11-23 21:20:34,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:34,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1619 [2019-11-23 21:20:34,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:34,183 INFO L225 Difference]: With dead ends: 24023 [2019-11-23 21:20:34,183 INFO L226 Difference]: Without dead ends: 12177 [2019-11-23 21:20:34,192 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1628 GetRequests, 1619 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:20:34,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2019-11-23 21:20:34,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 12177. [2019-11-23 21:20:34,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12177 states. [2019-11-23 21:20:34,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12177 states to 12177 states and 12509 transitions. [2019-11-23 21:20:34,387 INFO L78 Accepts]: Start accepts. Automaton has 12177 states and 12509 transitions. Word has length 1619 [2019-11-23 21:20:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:34,389 INFO L462 AbstractCegarLoop]: Abstraction has 12177 states and 12509 transitions. [2019-11-23 21:20:34,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 12177 states and 12509 transitions. [2019-11-23 21:20:34,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1789 [2019-11-23 21:20:34,435 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:34,436 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 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, 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, 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, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:20:34,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:20:34,650 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:34,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:34,651 INFO L82 PathProgramCache]: Analyzing trace with hash -299278861, now seen corresponding path program 1 times [2019-11-23 21:20:34,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:34,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208186741] [2019-11-23 21:20:34,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6420 backedges. 4810 proven. 339 refuted. 0 times theorem prover too weak. 1271 trivial. 0 not checked. [2019-11-23 21:20:40,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208186741] [2019-11-23 21:20:40,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48811372] [2019-11-23 21:20:40,036 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 21:20:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:40,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 2069 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:20:40,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:20:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6420 backedges. 2575 proven. 0 refuted. 0 times theorem prover too weak. 3845 trivial. 0 not checked. [2019-11-23 21:20:42,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:20:42,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2019-11-23 21:20:42,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979176309] [2019-11-23 21:20:42,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:42,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:42,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:42,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:20:42,858 INFO L87 Difference]: Start difference. First operand 12177 states and 12509 transitions. Second operand 3 states. [2019-11-23 21:20:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:44,017 INFO L93 Difference]: Finished difference Result 24681 states and 25360 transitions. [2019-11-23 21:20:44,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:44,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1788 [2019-11-23 21:20:44,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:44,041 INFO L225 Difference]: With dead ends: 24681 [2019-11-23 21:20:44,041 INFO L226 Difference]: Without dead ends: 12835 [2019-11-23 21:20:44,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1801 GetRequests, 1789 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:20:44,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12835 states. [2019-11-23 21:20:44,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12835 to 12177. [2019-11-23 21:20:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12177 states. [2019-11-23 21:20:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12177 states to 12177 states and 12502 transitions. [2019-11-23 21:20:44,190 INFO L78 Accepts]: Start accepts. Automaton has 12177 states and 12502 transitions. Word has length 1788 [2019-11-23 21:20:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:44,191 INFO L462 AbstractCegarLoop]: Abstraction has 12177 states and 12502 transitions. [2019-11-23 21:20:44,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 12177 states and 12502 transitions. [2019-11-23 21:20:44,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1819 [2019-11-23 21:20:44,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:44,227 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:20:44,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:20:44,433 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:44,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1110501745, now seen corresponding path program 1 times [2019-11-23 21:20:44,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:44,435 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704842350] [2019-11-23 21:20:44,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7270 backedges. 2578 proven. 157 refuted. 0 times theorem prover too weak. 4535 trivial. 0 not checked. [2019-11-23 21:20:47,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704842350] [2019-11-23 21:20:47,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107204603] [2019-11-23 21:20:47,898 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 21:20:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:20:48,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 2123 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 21:20:48,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:20:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7270 backedges. 2735 proven. 0 refuted. 0 times theorem prover too weak. 4535 trivial. 0 not checked. [2019-11-23 21:20:50,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:20:50,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2019-11-23 21:20:50,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147050945] [2019-11-23 21:20:50,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:20:50,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:20:50,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:20:50,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:20:50,174 INFO L87 Difference]: Start difference. First operand 12177 states and 12502 transitions. Second operand 3 states. [2019-11-23 21:20:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:20:51,450 INFO L93 Difference]: Finished difference Result 25997 states and 26705 transitions. [2019-11-23 21:20:51,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:20:51,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1818 [2019-11-23 21:20:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:20:51,477 INFO L225 Difference]: With dead ends: 25997 [2019-11-23 21:20:51,477 INFO L226 Difference]: Without dead ends: 13822 [2019-11-23 21:20:51,485 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1826 GetRequests, 1817 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:20:51,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13822 states. [2019-11-23 21:20:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13822 to 13822. [2019-11-23 21:20:51,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13822 states. [2019-11-23 21:20:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14168 transitions. [2019-11-23 21:20:51,648 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14168 transitions. Word has length 1818 [2019-11-23 21:20:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:20:51,649 INFO L462 AbstractCegarLoop]: Abstraction has 13822 states and 14168 transitions. [2019-11-23 21:20:51,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:20:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14168 transitions. [2019-11-23 21:20:51,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1925 [2019-11-23 21:20:51,696 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:20:51,698 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 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, 5, 5, 5, 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, 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] [2019-11-23 21:20:51,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:20:51,911 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:20:51,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:20:51,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1527906598, now seen corresponding path program 1 times [2019-11-23 21:20:51,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:20:51,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244860060] [2019-11-23 21:20:51,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:20:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat