/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_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:09:56,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:09:56,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:09:56,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 21:09:56,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 21:09:56,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 21:09:56,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 21:09:56,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 21:09:56,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 21:09:56,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 21:09:56,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 21:09:56,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 21:09:56,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:09:56,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:09:56,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:09:56,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:09:56,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:09:56,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:09:56,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:09:56,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:09:56,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:09:56,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:09:56,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:09:56,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:09:56,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:09:56,615 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 21:09:56,640 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:09:56,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:09:56,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:09:56,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:09:56,644 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:09:56,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:09:56,645 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:09:56,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:09:56,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:09:56,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:09:56,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:09:56,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:09:56,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:09:56,647 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:09:56,648 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:09:56,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:09:56,648 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:09:56,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:09:56,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:09:56,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:09:56,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:09:56,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:09:56,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:09:56,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:09:56,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:09:56,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:09:56,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:09:56,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:09:56,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:09:56,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:09:56,927 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:09:56,946 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:09:56,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:09:56,951 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:09:56,951 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:09:56,952 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label59.c [2019-11-23 21:09:57,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6e1c308/bcc63f742df444738c04e91d7c01a723/FLAG8970083ee [2019-11-23 21:09:57,817 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:09:57,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label59.c [2019-11-23 21:09:57,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6e1c308/bcc63f742df444738c04e91d7c01a723/FLAG8970083ee [2019-11-23 21:09:57,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6e1c308/bcc63f742df444738c04e91d7c01a723 [2019-11-23 21:09:57,886 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:09:57,888 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:09:57,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:09:57,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:09:57,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:09:57,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:57" (1/1) ... [2019-11-23 21:09:57,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@514e223f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:57, skipping insertion in model container [2019-11-23 21:09:57,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:57" (1/1) ... [2019-11-23 21:09:57,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:09:58,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:09:59,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:09:59,489 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:10:00,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:10:00,100 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:10:00,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:00 WrapperNode [2019-11-23 21:10:00,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:10:00,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:10:00,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:10:00,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:10:00,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:00" (1/1) ... [2019-11-23 21:10:00,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:00" (1/1) ... [2019-11-23 21:10:00,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:10:00,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:10:00,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:10:00,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:10:00,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:00" (1/1) ... [2019-11-23 21:10:00,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:00" (1/1) ... [2019-11-23 21:10:00,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:00" (1/1) ... [2019-11-23 21:10:00,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:00" (1/1) ... [2019-11-23 21:10:00,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:00" (1/1) ... [2019-11-23 21:10:00,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:00" (1/1) ... [2019-11-23 21:10:01,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:00" (1/1) ... [2019-11-23 21:10:01,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:10:01,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:10:01,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:10:01,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:10:01,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:00" (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 21:10:01,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:10:01,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:10:06,550 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:10:06,551 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 21:10:06,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:10:06 BoogieIcfgContainer [2019-11-23 21:10:06,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:10:06,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:10:06,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:10:06,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:10:06,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:09:57" (1/3) ... [2019-11-23 21:10:06,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd98797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:10:06, skipping insertion in model container [2019-11-23 21:10:06,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:00" (2/3) ... [2019-11-23 21:10:06,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd98797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:10:06, skipping insertion in model container [2019-11-23 21:10:06,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:10:06" (3/3) ... [2019-11-23 21:10:06,562 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label59.c [2019-11-23 21:10:06,573 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:10:06,583 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:10:06,595 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:10:06,642 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:10:06,642 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:10:06,642 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:10:06,642 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:10:06,642 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:10:06,643 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:10:06,643 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:10:06,643 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:10:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2019-11-23 21:10:06,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 21:10:06,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:06,690 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] [2019-11-23 21:10:06,691 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:06,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:06,697 INFO L82 PathProgramCache]: Analyzing trace with hash 626000386, now seen corresponding path program 1 times [2019-11-23 21:10:06,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:06,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328921603] [2019-11-23 21:10:06,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:06,997 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 21:10:06,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328921603] [2019-11-23 21:10:06,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:06,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:10:07,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39191244] [2019-11-23 21:10:07,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:10:07,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:07,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:10:07,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:07,024 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 4 states. [2019-11-23 21:10:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:14,901 INFO L93 Difference]: Finished difference Result 3142 states and 6130 transitions. [2019-11-23 21:10:14,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:10:14,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2019-11-23 21:10:14,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:14,938 INFO L225 Difference]: With dead ends: 3142 [2019-11-23 21:10:14,939 INFO L226 Difference]: Without dead ends: 2257 [2019-11-23 21:10:14,947 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 21:10:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2019-11-23 21:10:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2019-11-23 21:10:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2019-11-23 21:10:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 4039 transitions. [2019-11-23 21:10:15,085 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 4039 transitions. Word has length 44 [2019-11-23 21:10:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:15,086 INFO L462 AbstractCegarLoop]: Abstraction has 2257 states and 4039 transitions. [2019-11-23 21:10:15,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:10:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 4039 transitions. [2019-11-23 21:10:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-23 21:10:15,090 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:15,090 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, 1, 1, 1, 1, 1, 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 21:10:15,091 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:15,091 INFO L82 PathProgramCache]: Analyzing trace with hash 606861728, now seen corresponding path program 1 times [2019-11-23 21:10:15,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:15,092 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544836064] [2019-11-23 21:10:15,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:15,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544836064] [2019-11-23 21:10:15,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:15,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:10:15,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401428132] [2019-11-23 21:10:15,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:10:15,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:15,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:10:15,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:10:15,490 INFO L87 Difference]: Start difference. First operand 2257 states and 4039 transitions. Second operand 7 states. [2019-11-23 21:10:25,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:25,972 INFO L93 Difference]: Finished difference Result 7524 states and 13351 transitions. [2019-11-23 21:10:25,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:10:25,973 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2019-11-23 21:10:25,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:26,001 INFO L225 Difference]: With dead ends: 7524 [2019-11-23 21:10:26,001 INFO L226 Difference]: Without dead ends: 5269 [2019-11-23 21:10:26,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:10:26,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5269 states. [2019-11-23 21:10:26,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5269 to 5261. [2019-11-23 21:10:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5261 states. [2019-11-23 21:10:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 8364 transitions. [2019-11-23 21:10:26,110 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 8364 transitions. Word has length 109 [2019-11-23 21:10:26,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:26,111 INFO L462 AbstractCegarLoop]: Abstraction has 5261 states and 8364 transitions. [2019-11-23 21:10:26,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:10:26,111 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 8364 transitions. [2019-11-23 21:10:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 21:10:26,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:26,113 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:26,114 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:26,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1014367121, now seen corresponding path program 1 times [2019-11-23 21:10:26,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:26,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947981401] [2019-11-23 21:10:26,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:26,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947981401] [2019-11-23 21:10:26,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:26,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:10:26,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101562841] [2019-11-23 21:10:26,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:10:26,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:26,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:10:26,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:26,359 INFO L87 Difference]: Start difference. First operand 5261 states and 8364 transitions. Second operand 4 states. [2019-11-23 21:10:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:33,148 INFO L93 Difference]: Finished difference Result 13524 states and 21051 transitions. [2019-11-23 21:10:33,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:10:33,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2019-11-23 21:10:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:33,180 INFO L225 Difference]: With dead ends: 13524 [2019-11-23 21:10:33,180 INFO L226 Difference]: Without dead ends: 7514 [2019-11-23 21:10:33,188 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 21:10:33,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7514 states. [2019-11-23 21:10:33,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7514 to 7514. [2019-11-23 21:10:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7514 states. [2019-11-23 21:10:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7514 states to 7514 states and 10661 transitions. [2019-11-23 21:10:33,302 INFO L78 Accepts]: Start accepts. Automaton has 7514 states and 10661 transitions. Word has length 115 [2019-11-23 21:10:33,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:33,302 INFO L462 AbstractCegarLoop]: Abstraction has 7514 states and 10661 transitions. [2019-11-23 21:10:33,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:10:33,303 INFO L276 IsEmpty]: Start isEmpty. Operand 7514 states and 10661 transitions. [2019-11-23 21:10:33,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-23 21:10:33,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:33,306 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:33,306 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:33,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:33,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1293105368, now seen corresponding path program 1 times [2019-11-23 21:10:33,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:33,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467948548] [2019-11-23 21:10:33,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:33,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467948548] [2019-11-23 21:10:33,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:33,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:10:33,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916773491] [2019-11-23 21:10:33,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:10:33,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:33,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:10:33,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:33,475 INFO L87 Difference]: Start difference. First operand 7514 states and 10661 transitions. Second operand 4 states. [2019-11-23 21:10:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:42,036 INFO L93 Difference]: Finished difference Result 27793 states and 40365 transitions. [2019-11-23 21:10:42,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:10:42,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 189 [2019-11-23 21:10:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:42,115 INFO L225 Difference]: With dead ends: 27793 [2019-11-23 21:10:42,115 INFO L226 Difference]: Without dead ends: 21032 [2019-11-23 21:10:42,125 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 21:10:42,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21032 states. [2019-11-23 21:10:42,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21032 to 19530. [2019-11-23 21:10:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19530 states. [2019-11-23 21:10:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19530 states to 19530 states and 26418 transitions. [2019-11-23 21:10:42,454 INFO L78 Accepts]: Start accepts. Automaton has 19530 states and 26418 transitions. Word has length 189 [2019-11-23 21:10:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:42,455 INFO L462 AbstractCegarLoop]: Abstraction has 19530 states and 26418 transitions. [2019-11-23 21:10:42,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:10:42,456 INFO L276 IsEmpty]: Start isEmpty. Operand 19530 states and 26418 transitions. [2019-11-23 21:10:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-11-23 21:10:42,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:42,463 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, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:10:42,463 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:42,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:42,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1675215753, now seen corresponding path program 1 times [2019-11-23 21:10:42,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:42,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679188151] [2019-11-23 21:10:42,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 141 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 21:10:42,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679188151] [2019-11-23 21:10:42,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103789102] [2019-11-23 21:10:42,957 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 21:10:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:43,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:10:43,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:10:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:43,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:10:43,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2019-11-23 21:10:43,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885852910] [2019-11-23 21:10:43,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:10:43,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:43,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:10:43,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:10:43,381 INFO L87 Difference]: Start difference. First operand 19530 states and 26418 transitions. Second operand 3 states. [2019-11-23 21:10:48,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:48,344 INFO L93 Difference]: Finished difference Result 57082 states and 77735 transitions. [2019-11-23 21:10:48,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:10:48,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 280 [2019-11-23 21:10:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:48,431 INFO L225 Difference]: With dead ends: 57082 [2019-11-23 21:10:48,432 INFO L226 Difference]: Without dead ends: 38305 [2019-11-23 21:10:48,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:10:48,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38305 states. [2019-11-23 21:10:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38305 to 38305. [2019-11-23 21:10:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38305 states. [2019-11-23 21:10:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38305 states to 38305 states and 48584 transitions. [2019-11-23 21:10:49,267 INFO L78 Accepts]: Start accepts. Automaton has 38305 states and 48584 transitions. Word has length 280 [2019-11-23 21:10:49,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:49,268 INFO L462 AbstractCegarLoop]: Abstraction has 38305 states and 48584 transitions. [2019-11-23 21:10:49,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:10:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 38305 states and 48584 transitions. [2019-11-23 21:10:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-11-23 21:10:49,276 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:49,277 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, 2, 2, 2, 2, 2, 2, 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 21:10:49,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:10:49,483 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:49,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:49,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2673212, now seen corresponding path program 1 times [2019-11-23 21:10:49,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:49,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627323830] [2019-11-23 21:10:49,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 141 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 21:10:49,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627323830] [2019-11-23 21:10:49,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707490595] [2019-11-23 21:10:49,844 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 21:10:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:49,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 21:10:49,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:10:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 21:10:50,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:10:50,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-23 21:10:50,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243607736] [2019-11-23 21:10:50,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:10:50,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:50,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:10:50,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:10:50,047 INFO L87 Difference]: Start difference. First operand 38305 states and 48584 transitions. Second operand 3 states. [2019-11-23 21:10:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:53,043 INFO L93 Difference]: Finished difference Result 75894 states and 96446 transitions. [2019-11-23 21:10:53,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:10:53,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 285 [2019-11-23 21:10:53,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:53,099 INFO L225 Difference]: With dead ends: 75894 [2019-11-23 21:10:53,099 INFO L226 Difference]: Without dead ends: 38305 [2019-11-23 21:10:53,137 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 285 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:10:53,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38305 states. [2019-11-23 21:10:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38305 to 38305. [2019-11-23 21:10:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38305 states. [2019-11-23 21:10:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38305 states to 38305 states and 46810 transitions. [2019-11-23 21:10:54,840 INFO L78 Accepts]: Start accepts. Automaton has 38305 states and 46810 transitions. Word has length 285 [2019-11-23 21:10:54,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:54,842 INFO L462 AbstractCegarLoop]: Abstraction has 38305 states and 46810 transitions. [2019-11-23 21:10:54,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:10:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 38305 states and 46810 transitions. [2019-11-23 21:10:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2019-11-23 21:10:54,862 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:54,863 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:55,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:10:55,078 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:55,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:55,079 INFO L82 PathProgramCache]: Analyzing trace with hash 678419821, now seen corresponding path program 1 times [2019-11-23 21:10:55,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:55,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180539315] [2019-11-23 21:10:55,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 316 proven. 7 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-23 21:10:55,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180539315] [2019-11-23 21:10:55,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878171053] [2019-11-23 21:10:55,524 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 21:10:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:55,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:10:55,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:10:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-23 21:10:55,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:10:55,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2019-11-23 21:10:55,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921834165] [2019-11-23 21:10:55,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:10:55,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:55,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:10:55,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:10:55,891 INFO L87 Difference]: Start difference. First operand 38305 states and 46810 transitions. Second operand 3 states. [2019-11-23 21:11:00,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:00,564 INFO L93 Difference]: Finished difference Result 102893 states and 125717 transitions. [2019-11-23 21:11:00,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:11:00,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 448 [2019-11-23 21:11:00,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:00,631 INFO L225 Difference]: With dead ends: 102893 [2019-11-23 21:11:00,632 INFO L226 Difference]: Without dead ends: 65341 [2019-11-23 21:11:00,655 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:11:00,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65341 states. [2019-11-23 21:11:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65341 to 55578. [2019-11-23 21:11:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55578 states. [2019-11-23 21:11:01,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55578 states to 55578 states and 67338 transitions. [2019-11-23 21:11:01,628 INFO L78 Accepts]: Start accepts. Automaton has 55578 states and 67338 transitions. Word has length 448 [2019-11-23 21:11:01,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:01,629 INFO L462 AbstractCegarLoop]: Abstraction has 55578 states and 67338 transitions. [2019-11-23 21:11:01,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:11:01,630 INFO L276 IsEmpty]: Start isEmpty. Operand 55578 states and 67338 transitions. [2019-11-23 21:11:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2019-11-23 21:11:01,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:01,684 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:01,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:11:01,891 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:01,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:01,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1129160159, now seen corresponding path program 1 times [2019-11-23 21:11:01,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:01,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728529202] [2019-11-23 21:11:01,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 297 proven. 66 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 21:11:02,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728529202] [2019-11-23 21:11:02,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490223545] [2019-11-23 21:11:02,487 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 21:11:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:02,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:11:02,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:11:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 21:11:03,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:11:03,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2019-11-23 21:11:03,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754997705] [2019-11-23 21:11:03,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:11:03,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:03,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:11:03,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:11:03,236 INFO L87 Difference]: Start difference. First operand 55578 states and 67338 transitions. Second operand 3 states. [2019-11-23 21:11:07,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:11:07,910 INFO L93 Difference]: Finished difference Result 126925 states and 153960 transitions. [2019-11-23 21:11:07,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:11:07,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 540 [2019-11-23 21:11:07,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:11:08,007 INFO L225 Difference]: With dead ends: 126925 [2019-11-23 21:11:08,007 INFO L226 Difference]: Without dead ends: 72100 [2019-11-23 21:11:08,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 539 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:11:08,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72100 states. [2019-11-23 21:11:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72100 to 55578. [2019-11-23 21:11:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55578 states. [2019-11-23 21:11:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55578 states to 55578 states and 67338 transitions. [2019-11-23 21:11:08,986 INFO L78 Accepts]: Start accepts. Automaton has 55578 states and 67338 transitions. Word has length 540 [2019-11-23 21:11:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:11:08,986 INFO L462 AbstractCegarLoop]: Abstraction has 55578 states and 67338 transitions. [2019-11-23 21:11:08,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:11:08,987 INFO L276 IsEmpty]: Start isEmpty. Operand 55578 states and 67338 transitions. [2019-11-23 21:11:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2019-11-23 21:11:09,020 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:11:09,021 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:09,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:11:09,225 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:11:09,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:11:09,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1154209477, now seen corresponding path program 1 times [2019-11-23 21:11:09,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:11:09,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90392296] [2019-11-23 21:11:09,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:11:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:11:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2019-11-23 21:11:09,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90392296] [2019-11-23 21:11:09,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:11:09,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:11:09,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050419696] [2019-11-23 21:11:09,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:11:09,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:11:09,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:11:09,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:11:09,750 INFO L87 Difference]: Start difference. First operand 55578 states and 67338 transitions. Second operand 4 states.