/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/Problem12_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:09:07,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:09:07,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:09:07,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:09:07,628 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 21:09:07,661 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:09:07,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:09:07,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:09:07,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:09:07,665 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:09:07,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:09:07,665 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:09:07,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:09:07,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:09:07,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:09:07,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:09:07,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:09:07,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:09:07,672 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:09:07,672 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:09:07,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:09:07,672 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:09:07,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:09:07,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:09:07,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:09:07,673 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:09:07,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:09:07,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:09:07,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:09:07,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:09:07,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:09:07,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:09:07,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:09:07,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:09:07,675 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:09:07,966 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:09:07,979 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:09:07,983 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:09:07,985 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:09:07,985 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:09:07,986 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label46.c [2019-11-23 21:09:08,052 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8b9d223/4c76cbce96044e2eb6ec0b5c9d55fd37/FLAGea751ad70 [2019-11-23 21:09:08,817 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:09:08,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label46.c [2019-11-23 21:09:08,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8b9d223/4c76cbce96044e2eb6ec0b5c9d55fd37/FLAGea751ad70 [2019-11-23 21:09:08,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a8b9d223/4c76cbce96044e2eb6ec0b5c9d55fd37 [2019-11-23 21:09:08,917 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:09:08,918 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:09:08,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:09:08,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:09:08,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:09:08,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:08" (1/1) ... [2019-11-23 21:09:08,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7059378e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:08, skipping insertion in model container [2019-11-23 21:09:08,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:08" (1/1) ... [2019-11-23 21:09:08,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:09:09,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:09:10,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:09:10,530 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:09:11,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:09:11,292 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:09:11,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:11 WrapperNode [2019-11-23 21:09:11,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:09:11,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:09:11,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:09:11,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:09:11,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:11" (1/1) ... [2019-11-23 21:09:11,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:11" (1/1) ... [2019-11-23 21:09:11,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:09:11,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:09:11,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:09:11,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:09:11,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:11" (1/1) ... [2019-11-23 21:09:11,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:11" (1/1) ... [2019-11-23 21:09:11,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:11" (1/1) ... [2019-11-23 21:09:11,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:11" (1/1) ... [2019-11-23 21:09:12,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:11" (1/1) ... [2019-11-23 21:09:12,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:11" (1/1) ... [2019-11-23 21:09:12,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:11" (1/1) ... [2019-11-23 21:09:12,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:09:12,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:09:12,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:09:12,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:09:12,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:11" (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 21:09:12,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:09:12,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:09:17,793 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:09:17,793 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 21:09:17,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:17 BoogieIcfgContainer [2019-11-23 21:09:17,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:09:17,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:09:17,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:09:17,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:09:17,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:09:08" (1/3) ... [2019-11-23 21:09:17,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73edecb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:17, skipping insertion in model container [2019-11-23 21:09:17,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:11" (2/3) ... [2019-11-23 21:09:17,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73edecb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:17, skipping insertion in model container [2019-11-23 21:09:17,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:17" (3/3) ... [2019-11-23 21:09:17,804 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label46.c [2019-11-23 21:09:17,813 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:09:17,822 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:09:17,834 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:09:17,868 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:09:17,868 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:09:17,868 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:09:17,869 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:09:17,869 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:09:17,869 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:09:17,869 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:09:17,869 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:09:17,900 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2019-11-23 21:09:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 21:09:17,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:09:17,910 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] [2019-11-23 21:09:17,910 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:09:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:09:17,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1818267785, now seen corresponding path program 1 times [2019-11-23 21:09:17,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:09:17,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203848266] [2019-11-23 21:09:17,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:09:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:18,261 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 21:09:18,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203848266] [2019-11-23 21:09:18,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:09:18,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:09:18,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732480047] [2019-11-23 21:09:18,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:09:18,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:09:18,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:09:18,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:09:18,289 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 4 states. [2019-11-23 21:09:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:09:26,842 INFO L93 Difference]: Finished difference Result 3158 states and 6146 transitions. [2019-11-23 21:09:26,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:09:26,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-11-23 21:09:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:09:26,881 INFO L225 Difference]: With dead ends: 3158 [2019-11-23 21:09:26,882 INFO L226 Difference]: Without dead ends: 2257 [2019-11-23 21:09:26,889 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 21:09:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2019-11-23 21:09:27,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2019-11-23 21:09:27,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2019-11-23 21:09:27,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3745 transitions. [2019-11-23 21:09:27,022 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3745 transitions. Word has length 61 [2019-11-23 21:09:27,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:09:27,023 INFO L462 AbstractCegarLoop]: Abstraction has 2257 states and 3745 transitions. [2019-11-23 21:09:27,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:09:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3745 transitions. [2019-11-23 21:09:27,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-23 21:09:27,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:09:27,032 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, 2, 2, 2, 2, 2, 2, 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 21:09:27,032 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:09:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:09:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash -379977097, now seen corresponding path program 1 times [2019-11-23 21:09:27,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:09:27,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790347754] [2019-11-23 21:09:27,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:09:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:09:27,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790347754] [2019-11-23 21:09:27,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:09:27,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:09:27,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347834776] [2019-11-23 21:09:27,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:09:27,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:09:27,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:09:27,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:09:27,338 INFO L87 Difference]: Start difference. First operand 2257 states and 3745 transitions. Second operand 4 states. [2019-11-23 21:09:34,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:09:34,664 INFO L93 Difference]: Finished difference Result 9020 states and 14973 transitions. [2019-11-23 21:09:34,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:09:34,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-11-23 21:09:34,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:09:34,700 INFO L225 Difference]: With dead ends: 9020 [2019-11-23 21:09:34,701 INFO L226 Difference]: Without dead ends: 6765 [2019-11-23 21:09:34,705 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 21:09:34,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6765 states. [2019-11-23 21:09:34,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6765 to 4510. [2019-11-23 21:09:34,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4510 states. [2019-11-23 21:09:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 6755 transitions. [2019-11-23 21:09:34,801 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 6755 transitions. Word has length 156 [2019-11-23 21:09:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:09:34,802 INFO L462 AbstractCegarLoop]: Abstraction has 4510 states and 6755 transitions. [2019-11-23 21:09:34,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:09:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 6755 transitions. [2019-11-23 21:09:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-11-23 21:09:34,807 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:09:34,807 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, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:09:34,807 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:09:34,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:09:34,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1493985004, now seen corresponding path program 1 times [2019-11-23 21:09:34,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:09:34,808 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218117994] [2019-11-23 21:09:34,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:09:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 21:09:35,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218117994] [2019-11-23 21:09:35,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564163282] [2019-11-23 21:09:35,434 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 21:09:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:35,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:09:35,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:09:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:09:35,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:09:35,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2019-11-23 21:09:35,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353497478] [2019-11-23 21:09:35,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:09:35,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:09:35,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:09:35,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:09:35,601 INFO L87 Difference]: Start difference. First operand 4510 states and 6755 transitions. Second operand 3 states. [2019-11-23 21:09:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:09:40,567 INFO L93 Difference]: Finished difference Result 13524 states and 20260 transitions. [2019-11-23 21:09:40,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:09:40,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 206 [2019-11-23 21:09:40,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:09:40,603 INFO L225 Difference]: With dead ends: 13524 [2019-11-23 21:09:40,603 INFO L226 Difference]: Without dead ends: 9016 [2019-11-23 21:09:40,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 205 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:09:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9016 states. [2019-11-23 21:09:40,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9016 to 9016. [2019-11-23 21:09:40,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9016 states. [2019-11-23 21:09:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9016 states to 9016 states and 12851 transitions. [2019-11-23 21:09:40,793 INFO L78 Accepts]: Start accepts. Automaton has 9016 states and 12851 transitions. Word has length 206 [2019-11-23 21:09:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:09:40,795 INFO L462 AbstractCegarLoop]: Abstraction has 9016 states and 12851 transitions. [2019-11-23 21:09:40,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:09:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 9016 states and 12851 transitions. [2019-11-23 21:09:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-11-23 21:09:40,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:09:40,802 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, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:09:41,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:09:41,015 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:09:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:09:41,016 INFO L82 PathProgramCache]: Analyzing trace with hash 609497943, now seen corresponding path program 1 times [2019-11-23 21:09:41,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:09:41,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897710409] [2019-11-23 21:09:41,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:09:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:09:41,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897710409] [2019-11-23 21:09:41,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:09:41,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:09:41,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69336976] [2019-11-23 21:09:41,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:09:41,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:09:41,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:09:41,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:09:41,496 INFO L87 Difference]: Start difference. First operand 9016 states and 12851 transitions. Second operand 7 states. [2019-11-23 21:09:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:09:50,810 INFO L93 Difference]: Finished difference Result 18822 states and 26612 transitions. [2019-11-23 21:09:50,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:09:50,811 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 219 [2019-11-23 21:09:50,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:09:50,861 INFO L225 Difference]: With dead ends: 18822 [2019-11-23 21:09:50,862 INFO L226 Difference]: Without dead ends: 9808 [2019-11-23 21:09:50,870 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:09:50,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9808 states. [2019-11-23 21:09:51,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9808 to 9767. [2019-11-23 21:09:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9767 states. [2019-11-23 21:09:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 13608 transitions. [2019-11-23 21:09:51,089 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 13608 transitions. Word has length 219 [2019-11-23 21:09:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:09:51,090 INFO L462 AbstractCegarLoop]: Abstraction has 9767 states and 13608 transitions. [2019-11-23 21:09:51,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:09:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 13608 transitions. [2019-11-23 21:09:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-11-23 21:09:51,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:09:51,099 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, 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] [2019-11-23 21:09:51,099 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:09:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:09:51,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1805135861, now seen corresponding path program 1 times [2019-11-23 21:09:51,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:09:51,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977782887] [2019-11-23 21:09:51,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:09:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 168 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 21:09:51,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977782887] [2019-11-23 21:09:51,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346630693] [2019-11-23 21:09:51,653 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 21:09:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:51,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:09:51,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:09:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-11-23 21:09:51,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:09:51,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2019-11-23 21:09:51,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874711200] [2019-11-23 21:09:51,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:09:51,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:09:51,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:09:51,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:09:51,938 INFO L87 Difference]: Start difference. First operand 9767 states and 13608 transitions. Second operand 3 states. [2019-11-23 21:09:56,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:09:56,221 INFO L93 Difference]: Finished difference Result 27793 states and 39305 transitions. [2019-11-23 21:09:56,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:09:56,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 271 [2019-11-23 21:09:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:09:56,260 INFO L225 Difference]: With dead ends: 27793 [2019-11-23 21:09:56,260 INFO L226 Difference]: Without dead ends: 14273 [2019-11-23 21:09:56,272 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 270 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:09:56,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14273 states. [2019-11-23 21:09:56,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14273 to 14273. [2019-11-23 21:09:56,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14273 states. [2019-11-23 21:09:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 17322 transitions. [2019-11-23 21:09:56,457 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 17322 transitions. Word has length 271 [2019-11-23 21:09:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:09:56,458 INFO L462 AbstractCegarLoop]: Abstraction has 14273 states and 17322 transitions. [2019-11-23 21:09:56,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:09:56,458 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 17322 transitions. [2019-11-23 21:09:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2019-11-23 21:09:56,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:09:56,465 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:09:56,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:09:56,670 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:09:56,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:09:56,671 INFO L82 PathProgramCache]: Analyzing trace with hash -68253287, now seen corresponding path program 1 times [2019-11-23 21:09:56,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:09:56,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252604417] [2019-11-23 21:09:56,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:09:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 21:09:57,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252604417] [2019-11-23 21:09:57,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750822502] [2019-11-23 21:09:57,320 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 21:09:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:57,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:09:57,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:09:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 21:09:57,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:09:57,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2019-11-23 21:09:57,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601953858] [2019-11-23 21:09:57,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:09:57,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:09:57,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:09:57,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:09:57,608 INFO L87 Difference]: Start difference. First operand 14273 states and 17322 transitions. Second operand 3 states. [2019-11-23 21:10:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:01,773 INFO L93 Difference]: Finished difference Result 36054 states and 44836 transitions. [2019-11-23 21:10:01,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:10:01,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 319 [2019-11-23 21:10:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:01,822 INFO L225 Difference]: With dead ends: 36054 [2019-11-23 21:10:01,822 INFO L226 Difference]: Without dead ends: 22534 [2019-11-23 21:10:01,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 318 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:10:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2019-11-23 21:10:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22534. [2019-11-23 21:10:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22534 states. [2019-11-23 21:10:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22534 states to 22534 states and 27511 transitions. [2019-11-23 21:10:02,195 INFO L78 Accepts]: Start accepts. Automaton has 22534 states and 27511 transitions. Word has length 319 [2019-11-23 21:10:02,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:02,196 INFO L462 AbstractCegarLoop]: Abstraction has 22534 states and 27511 transitions. [2019-11-23 21:10:02,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:10:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand 22534 states and 27511 transitions. [2019-11-23 21:10:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2019-11-23 21:10:02,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:02,217 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:10:02,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:10:02,421 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:02,421 INFO L82 PathProgramCache]: Analyzing trace with hash -683412189, now seen corresponding path program 1 times [2019-11-23 21:10:02,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:02,422 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297129941] [2019-11-23 21:10:02,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 117 proven. 66 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-23 21:10:03,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297129941] [2019-11-23 21:10:03,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967676534] [2019-11-23 21:10:03,085 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 21:10:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:03,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:10:03,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:10:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-11-23 21:10:03,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:10:03,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2019-11-23 21:10:03,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354060893] [2019-11-23 21:10:03,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:10:03,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:03,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:10:03,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:10:03,511 INFO L87 Difference]: Start difference. First operand 22534 states and 27511 transitions. Second operand 3 states. [2019-11-23 21:10:07,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:07,344 INFO L93 Difference]: Finished difference Result 44315 states and 54264 transitions. [2019-11-23 21:10:07,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:10:07,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2019-11-23 21:10:07,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:07,382 INFO L225 Difference]: With dead ends: 44315 [2019-11-23 21:10:07,383 INFO L226 Difference]: Without dead ends: 22534 [2019-11-23 21:10:07,401 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 489 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:10:07,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2019-11-23 21:10:07,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22534. [2019-11-23 21:10:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22534 states. [2019-11-23 21:10:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22534 states to 22534 states and 25646 transitions. [2019-11-23 21:10:07,702 INFO L78 Accepts]: Start accepts. Automaton has 22534 states and 25646 transitions. Word has length 490 [2019-11-23 21:10:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:07,702 INFO L462 AbstractCegarLoop]: Abstraction has 22534 states and 25646 transitions. [2019-11-23 21:10:07,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:10:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 22534 states and 25646 transitions. [2019-11-23 21:10:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2019-11-23 21:10:07,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:07,716 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:10:07,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:10:07,920 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:07,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1103887129, now seen corresponding path program 1 times [2019-11-23 21:10:07,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:07,921 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361998338] [2019-11-23 21:10:07,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:08,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361998338] [2019-11-23 21:10:08,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:08,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:10:08,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777209600] [2019-11-23 21:10:08,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:10:08,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:08,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:10:08,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:08,805 INFO L87 Difference]: Start difference. First operand 22534 states and 25646 transitions. Second operand 4 states. [2019-11-23 21:10:15,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:15,097 INFO L93 Difference]: Finished difference Result 54829 states and 62759 transitions. [2019-11-23 21:10:15,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:10:15,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2019-11-23 21:10:15,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:15,141 INFO L225 Difference]: With dead ends: 54829 [2019-11-23 21:10:15,141 INFO L226 Difference]: Without dead ends: 33048 [2019-11-23 21:10:15,158 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33048 states. [2019-11-23 21:10:15,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33048 to 30795. [2019-11-23 21:10:15,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30795 states. [2019-11-23 21:10:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30795 states to 30795 states and 34893 transitions. [2019-11-23 21:10:15,495 INFO L78 Accepts]: Start accepts. Automaton has 30795 states and 34893 transitions. Word has length 505 [2019-11-23 21:10:15,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:15,498 INFO L462 AbstractCegarLoop]: Abstraction has 30795 states and 34893 transitions. [2019-11-23 21:10:15,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:10:15,498 INFO L276 IsEmpty]: Start isEmpty. Operand 30795 states and 34893 transitions. [2019-11-23 21:10:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2019-11-23 21:10:15,515 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:15,515 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:10:15,516 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:15,516 INFO L82 PathProgramCache]: Analyzing trace with hash -896205937, now seen corresponding path program 1 times [2019-11-23 21:10:15,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:15,517 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940428655] [2019-11-23 21:10:15,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 21:10:16,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940428655] [2019-11-23 21:10:16,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585625441] [2019-11-23 21:10:16,842 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 21:10:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:16,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 21:10:17,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:10:17,072 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:10:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 94 proven. 108 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2019-11-23 21:10:17,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:10:17,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 21:10:17,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986390335] [2019-11-23 21:10:17,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 21:10:17,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:17,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 21:10:17,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:10:17,681 INFO L87 Difference]: Start difference. First operand 30795 states and 34893 transitions. Second operand 8 states.