/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_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:09:15,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:09:15,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:09:15,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:09:15,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:09:15,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:09:15,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:09:15,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:09:15,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:09:15,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:09:15,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:09:15,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:09:15,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:09:15,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:09:15,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:09:15,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:09:16,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:09:16,020 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 21:09:16,039 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:09:16,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:09:16,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:09:16,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:09:16,041 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:09:16,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:09:16,042 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:09:16,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:09:16,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:09:16,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:09:16,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:09:16,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:09:16,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:09:16,044 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:09:16,044 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:09:16,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:09:16,045 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:09:16,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:09:16,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:09:16,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:09:16,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:09:16,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:09:16,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:09:16,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:09:16,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:09:16,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:09:16,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:09:16,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:09:16,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:09:16,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:09:16,318 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:09:16,335 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:09:16,338 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:09:16,340 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:09:16,340 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:09:16,342 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label49.c [2019-11-23 21:09:16,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b6bc26b3/f322f01130174cb5bacdc8ea9ed2bd3f/FLAGf353db421 [2019-11-23 21:09:17,216 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:09:17,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label49.c [2019-11-23 21:09:17,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b6bc26b3/f322f01130174cb5bacdc8ea9ed2bd3f/FLAGf353db421 [2019-11-23 21:09:17,738 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b6bc26b3/f322f01130174cb5bacdc8ea9ed2bd3f [2019-11-23 21:09:17,747 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:09:17,749 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:09:17,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:09:17,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:09:17,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:09:17,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:17" (1/1) ... [2019-11-23 21:09:17,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cf9c1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:17, skipping insertion in model container [2019-11-23 21:09:17,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:17" (1/1) ... [2019-11-23 21:09:17,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:09:17,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:09:19,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:09:19,362 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:09:20,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:09:20,051 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:09:20,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:20 WrapperNode [2019-11-23 21:09:20,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:09:20,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:09:20,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:09:20,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:09:20,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:20" (1/1) ... [2019-11-23 21:09:20,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:20" (1/1) ... [2019-11-23 21:09:20,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:09:20,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:09:20,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:09:20,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:09:20,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:20" (1/1) ... [2019-11-23 21:09:20,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:20" (1/1) ... [2019-11-23 21:09:20,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:20" (1/1) ... [2019-11-23 21:09:20,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:20" (1/1) ... [2019-11-23 21:09:20,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:20" (1/1) ... [2019-11-23 21:09:20,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:20" (1/1) ... [2019-11-23 21:09:20,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:20" (1/1) ... [2019-11-23 21:09:20,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:09:20,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:09:20,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:09:20,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:09:20,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:20" (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 21:09:20,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:09:20,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:09:26,216 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:09:26,216 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 21:09:26,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:26 BoogieIcfgContainer [2019-11-23 21:09:26,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:09:26,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:09:26,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:09:26,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:09:26,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:09:17" (1/3) ... [2019-11-23 21:09:26,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e558c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:26, skipping insertion in model container [2019-11-23 21:09:26,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:20" (2/3) ... [2019-11-23 21:09:26,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e558c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:26, skipping insertion in model container [2019-11-23 21:09:26,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:26" (3/3) ... [2019-11-23 21:09:26,232 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label49.c [2019-11-23 21:09:26,242 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:09:26,252 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:09:26,264 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:09:26,311 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:09:26,311 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:09:26,311 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:09:26,311 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:09:26,311 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:09:26,312 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:09:26,312 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:09:26,313 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:09:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2019-11-23 21:09:26,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 21:09:26,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:09:26,354 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] [2019-11-23 21:09:26,354 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:09:26,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:09:26,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1824112922, now seen corresponding path program 1 times [2019-11-23 21:09:26,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:09:26,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670514920] [2019-11-23 21:09:26,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:09:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:26,675 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 21:09:26,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670514920] [2019-11-23 21:09:26,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:09:26,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:09:26,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396679365] [2019-11-23 21:09:26,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:09:26,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:09:26,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:09:26,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:09:26,703 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 4 states. [2019-11-23 21:09:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:09:34,250 INFO L93 Difference]: Finished difference Result 3142 states and 6130 transitions. [2019-11-23 21:09:34,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:09:34,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2019-11-23 21:09:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:09:34,289 INFO L225 Difference]: With dead ends: 3142 [2019-11-23 21:09:34,289 INFO L226 Difference]: Without dead ends: 2257 [2019-11-23 21:09:34,297 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 21:09:34,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2019-11-23 21:09:34,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2019-11-23 21:09:34,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2019-11-23 21:09:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 4045 transitions. [2019-11-23 21:09:34,432 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 4045 transitions. Word has length 42 [2019-11-23 21:09:34,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:09:34,432 INFO L462 AbstractCegarLoop]: Abstraction has 2257 states and 4045 transitions. [2019-11-23 21:09:34,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:09:34,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 4045 transitions. [2019-11-23 21:09:34,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-23 21:09:34,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:09:34,438 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:34,439 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:09:34,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:09:34,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1325786177, now seen corresponding path program 1 times [2019-11-23 21:09:34,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:09:34,440 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415045509] [2019-11-23 21:09:34,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:09:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:09:34,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415045509] [2019-11-23 21:09:34,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:09:34,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:09:34,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502603535] [2019-11-23 21:09:34,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:09:34,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:09:34,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:09:34,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:09:34,597 INFO L87 Difference]: Start difference. First operand 2257 states and 4045 transitions. Second operand 4 states. [2019-11-23 21:09:42,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:09:42,023 INFO L93 Difference]: Finished difference Result 9018 states and 16172 transitions. [2019-11-23 21:09:42,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:09:42,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2019-11-23 21:09:42,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:09:42,059 INFO L225 Difference]: With dead ends: 9018 [2019-11-23 21:09:42,059 INFO L226 Difference]: Without dead ends: 6763 [2019-11-23 21:09:42,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 21:09:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2019-11-23 21:09:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2019-11-23 21:09:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6763 states. [2019-11-23 21:09:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 10269 transitions. [2019-11-23 21:09:42,200 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 10269 transitions. Word has length 117 [2019-11-23 21:09:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:09:42,201 INFO L462 AbstractCegarLoop]: Abstraction has 6763 states and 10269 transitions. [2019-11-23 21:09:42,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:09:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 10269 transitions. [2019-11-23 21:09:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 21:09:42,205 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:09:42,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:42,206 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:09:42,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:09:42,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1789746704, now seen corresponding path program 1 times [2019-11-23 21:09:42,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:09:42,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740885755] [2019-11-23 21:09:42,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:09:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:09:42,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740885755] [2019-11-23 21:09:42,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:09:42,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:09:42,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813820901] [2019-11-23 21:09:42,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:09:42,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:09:42,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:09:42,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:09:42,369 INFO L87 Difference]: Start difference. First operand 6763 states and 10269 transitions. Second operand 4 states. [2019-11-23 21:09:49,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:09:49,509 INFO L93 Difference]: Finished difference Result 27044 states and 41069 transitions. [2019-11-23 21:09:49,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:09:49,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-11-23 21:09:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:09:49,591 INFO L225 Difference]: With dead ends: 27044 [2019-11-23 21:09:49,591 INFO L226 Difference]: Without dead ends: 20283 [2019-11-23 21:09:49,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 21:09:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20283 states. [2019-11-23 21:09:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20283 to 13522. [2019-11-23 21:09:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13522 states. [2019-11-23 21:09:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13522 states to 13522 states and 18681 transitions. [2019-11-23 21:09:49,882 INFO L78 Accepts]: Start accepts. Automaton has 13522 states and 18681 transitions. Word has length 123 [2019-11-23 21:09:49,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:09:49,885 INFO L462 AbstractCegarLoop]: Abstraction has 13522 states and 18681 transitions. [2019-11-23 21:09:49,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:09:49,890 INFO L276 IsEmpty]: Start isEmpty. Operand 13522 states and 18681 transitions. [2019-11-23 21:09:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 21:09:49,894 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:09:49,894 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:49,895 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:09:49,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:09:49,895 INFO L82 PathProgramCache]: Analyzing trace with hash 644729987, now seen corresponding path program 1 times [2019-11-23 21:09:49,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:09:49,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620241926] [2019-11-23 21:09:49,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:09:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:09:50,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620241926] [2019-11-23 21:09:50,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:09:50,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:09:50,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588294642] [2019-11-23 21:09:50,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:09:50,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:09:50,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:09:50,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:09:50,097 INFO L87 Difference]: Start difference. First operand 13522 states and 18681 transitions. Second operand 4 states. [2019-11-23 21:09:57,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:09:57,605 INFO L93 Difference]: Finished difference Result 50325 states and 69888 transitions. [2019-11-23 21:09:57,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:09:57,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2019-11-23 21:09:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:09:57,673 INFO L225 Difference]: With dead ends: 50325 [2019-11-23 21:09:57,674 INFO L226 Difference]: Without dead ends: 36805 [2019-11-23 21:09:57,691 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 21:09:57,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36805 states. [2019-11-23 21:09:58,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36805 to 25538. [2019-11-23 21:09:58,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25538 states. [2019-11-23 21:09:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25538 states to 25538 states and 32317 transitions. [2019-11-23 21:09:58,117 INFO L78 Accepts]: Start accepts. Automaton has 25538 states and 32317 transitions. Word has length 141 [2019-11-23 21:09:58,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:09:58,120 INFO L462 AbstractCegarLoop]: Abstraction has 25538 states and 32317 transitions. [2019-11-23 21:09:58,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:09:58,121 INFO L276 IsEmpty]: Start isEmpty. Operand 25538 states and 32317 transitions. [2019-11-23 21:09:58,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-23 21:09:58,123 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:09:58,124 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:58,124 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:09:58,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:09:58,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1239251930, now seen corresponding path program 1 times [2019-11-23 21:09:58,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:09:58,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403025660] [2019-11-23 21:09:58,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:09:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 21:09:58,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403025660] [2019-11-23 21:09:58,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110712058] [2019-11-23 21:09:58,693 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 21:09:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:09:58,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:09:58,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:09:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-23 21:09:58,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:09:58,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2019-11-23 21:09:58,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516989565] [2019-11-23 21:09:58,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:09:58,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:09:58,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:09:58,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:09:58,863 INFO L87 Difference]: Start difference. First operand 25538 states and 32317 transitions. Second operand 3 states. [2019-11-23 21:10:03,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:03,566 INFO L93 Difference]: Finished difference Result 73604 states and 92967 transitions. [2019-11-23 21:10:03,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:10:03,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 183 [2019-11-23 21:10:03,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:03,667 INFO L225 Difference]: With dead ends: 73604 [2019-11-23 21:10:03,667 INFO L226 Difference]: Without dead ends: 48068 [2019-11-23 21:10:03,697 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:10:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48068 states. [2019-11-23 21:10:04,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48068 to 41309. [2019-11-23 21:10:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41309 states. [2019-11-23 21:10:04,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41309 states to 41309 states and 50344 transitions. [2019-11-23 21:10:04,360 INFO L78 Accepts]: Start accepts. Automaton has 41309 states and 50344 transitions. Word has length 183 [2019-11-23 21:10:04,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:04,361 INFO L462 AbstractCegarLoop]: Abstraction has 41309 states and 50344 transitions. [2019-11-23 21:10:04,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:10:04,361 INFO L276 IsEmpty]: Start isEmpty. Operand 41309 states and 50344 transitions. [2019-11-23 21:10:04,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2019-11-23 21:10:04,366 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:04,367 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:10:04,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:10:04,573 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:04,573 INFO L82 PathProgramCache]: Analyzing trace with hash -598313025, now seen corresponding path program 1 times [2019-11-23 21:10:04,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:04,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038106067] [2019-11-23 21:10:04,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:10:04,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038106067] [2019-11-23 21:10:04,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:04,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:10:04,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119354218] [2019-11-23 21:10:04,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:10:04,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:04,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:10:04,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:04,959 INFO L87 Difference]: Start difference. First operand 41309 states and 50344 transitions. Second operand 4 states. [2019-11-23 21:10:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:12,308 INFO L93 Difference]: Finished difference Result 87122 states and 105588 transitions. [2019-11-23 21:10:12,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:10:12,309 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 269 [2019-11-23 21:10:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:12,445 INFO L225 Difference]: With dead ends: 87122 [2019-11-23 21:10:12,446 INFO L226 Difference]: Without dead ends: 45815 [2019-11-23 21:10:12,483 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 21:10:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45815 states. [2019-11-23 21:10:13,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45815 to 45064. [2019-11-23 21:10:13,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45064 states. [2019-11-23 21:10:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45064 states to 45064 states and 53427 transitions. [2019-11-23 21:10:13,242 INFO L78 Accepts]: Start accepts. Automaton has 45064 states and 53427 transitions. Word has length 269 [2019-11-23 21:10:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:13,242 INFO L462 AbstractCegarLoop]: Abstraction has 45064 states and 53427 transitions. [2019-11-23 21:10:13,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:10:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 45064 states and 53427 transitions. [2019-11-23 21:10:13,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-11-23 21:10:13,253 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:13,253 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:10:13,254 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:13,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1309792075, now seen corresponding path program 1 times [2019-11-23 21:10:13,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:13,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776371763] [2019-11-23 21:10:13,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-11-23 21:10:13,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776371763] [2019-11-23 21:10:13,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:13,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:10:13,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466398] [2019-11-23 21:10:13,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:10:13,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:13,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:10:13,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:13,433 INFO L87 Difference]: Start difference. First operand 45064 states and 53427 transitions. Second operand 4 states. [2019-11-23 21:10:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:20,915 INFO L93 Difference]: Finished difference Result 111905 states and 134099 transitions. [2019-11-23 21:10:20,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:10:20,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 273 [2019-11-23 21:10:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:21,007 INFO L225 Difference]: With dead ends: 111905 [2019-11-23 21:10:21,008 INFO L226 Difference]: Without dead ends: 66843 [2019-11-23 21:10:21,040 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 21:10:21,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66843 states. [2019-11-23 21:10:21,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66843 to 62337. [2019-11-23 21:10:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62337 states. [2019-11-23 21:10:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62337 states to 62337 states and 72661 transitions. [2019-11-23 21:10:21,754 INFO L78 Accepts]: Start accepts. Automaton has 62337 states and 72661 transitions. Word has length 273 [2019-11-23 21:10:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:21,756 INFO L462 AbstractCegarLoop]: Abstraction has 62337 states and 72661 transitions. [2019-11-23 21:10:21,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:10:21,756 INFO L276 IsEmpty]: Start isEmpty. Operand 62337 states and 72661 transitions. [2019-11-23 21:10:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2019-11-23 21:10:21,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:21,765 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:10:21,766 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:21,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:21,766 INFO L82 PathProgramCache]: Analyzing trace with hash 599792067, now seen corresponding path program 1 times [2019-11-23 21:10:21,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:21,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98531552] [2019-11-23 21:10:21,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-23 21:10:21,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98531552] [2019-11-23 21:10:21,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:21,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:10:21,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619978414] [2019-11-23 21:10:21,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:10:21,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:21,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:10:21,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:10:21,953 INFO L87 Difference]: Start difference. First operand 62337 states and 72661 transitions. Second operand 4 states. [2019-11-23 21:10:30,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:10:30,398 INFO L93 Difference]: Finished difference Result 124672 states and 145320 transitions. [2019-11-23 21:10:30,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:10:30,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 282 [2019-11-23 21:10:30,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:10:30,470 INFO L225 Difference]: With dead ends: 124672 [2019-11-23 21:10:30,470 INFO L226 Difference]: Without dead ends: 62337 [2019-11-23 21:10:30,504 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 21:10:30,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62337 states. [2019-11-23 21:10:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62337 to 60835. [2019-11-23 21:10:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60835 states. [2019-11-23 21:10:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60835 states to 60835 states and 66705 transitions. [2019-11-23 21:10:30,972 INFO L78 Accepts]: Start accepts. Automaton has 60835 states and 66705 transitions. Word has length 282 [2019-11-23 21:10:30,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:10:30,972 INFO L462 AbstractCegarLoop]: Abstraction has 60835 states and 66705 transitions. [2019-11-23 21:10:30,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:10:30,973 INFO L276 IsEmpty]: Start isEmpty. Operand 60835 states and 66705 transitions. [2019-11-23 21:10:30,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2019-11-23 21:10:30,982 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:10:30,982 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, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:30,982 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:10:30,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:10:30,983 INFO L82 PathProgramCache]: Analyzing trace with hash 228847352, now seen corresponding path program 1 times [2019-11-23 21:10:30,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:10:30,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954731184] [2019-11-23 21:10:30,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:10:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:10:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-11-23 21:10:32,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954731184] [2019-11-23 21:10:32,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:10:32,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 21:10:32,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623312967] [2019-11-23 21:10:32,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 21:10:32,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:10:32,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 21:10:32,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:10:32,196 INFO L87 Difference]: Start difference. First operand 60835 states and 66705 transitions. Second operand 6 states.