/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:23:23,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:23:23,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:23:23,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:23:23,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:23:23,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:23:23,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:23:23,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:23:23,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:23:23,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:23:23,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:23:23,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:23:23,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:23:23,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:23:23,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:23:23,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:23:23,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:23:23,990 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 21:23:24,005 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:23:24,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:23:24,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:23:24,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:23:24,007 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:23:24,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:23:24,007 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:23:24,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:23:24,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:23:24,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:23:24,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:23:24,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:23:24,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:23:24,008 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:23:24,008 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:23:24,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:23:24,009 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:23:24,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:23:24,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:23:24,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:23:24,010 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:23:24,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:23:24,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:23:24,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:23:24,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:23:24,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:23:24,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:23:24,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:23:24,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:23:24,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:23:24,295 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:23:24,309 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:23:24,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:23:24,314 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:23:24,314 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:23:24,315 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label30.c [2019-11-23 21:23:24,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fa23079d/1838796b0b7c4a56937f64cafc410023/FLAG8ce55d0dc [2019-11-23 21:23:25,117 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:23:25,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label30.c [2019-11-23 21:23:25,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fa23079d/1838796b0b7c4a56937f64cafc410023/FLAG8ce55d0dc [2019-11-23 21:23:25,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fa23079d/1838796b0b7c4a56937f64cafc410023 [2019-11-23 21:23:25,238 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:23:25,242 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:23:25,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:23:25,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:23:25,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:23:25,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:25" (1/1) ... [2019-11-23 21:23:25,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@348a1bdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:25, skipping insertion in model container [2019-11-23 21:23:25,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:25" (1/1) ... [2019-11-23 21:23:25,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:23:25,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:23:26,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:23:26,579 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:23:27,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:23:27,139 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:23:27,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:27 WrapperNode [2019-11-23 21:23:27,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:23:27,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:23:27,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:23:27,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:23:27,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:27" (1/1) ... [2019-11-23 21:23:27,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:27" (1/1) ... [2019-11-23 21:23:27,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:23:27,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:23:27,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:23:27,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:23:27,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:27" (1/1) ... [2019-11-23 21:23:27,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:27" (1/1) ... [2019-11-23 21:23:27,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:27" (1/1) ... [2019-11-23 21:23:27,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:27" (1/1) ... [2019-11-23 21:23:27,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:27" (1/1) ... [2019-11-23 21:23:27,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:27" (1/1) ... [2019-11-23 21:23:27,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:27" (1/1) ... [2019-11-23 21:23:27,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:23:27,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:23:27,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:23:27,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:23:27,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:27" (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 21:23:27,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:23:27,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:23:31,738 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:23:31,739 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:23:31,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:31 BoogieIcfgContainer [2019-11-23 21:23:31,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:23:31,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:23:31,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:23:31,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:23:31,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:23:25" (1/3) ... [2019-11-23 21:23:31,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a9cee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:31, skipping insertion in model container [2019-11-23 21:23:31,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:27" (2/3) ... [2019-11-23 21:23:31,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a9cee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:31, skipping insertion in model container [2019-11-23 21:23:31,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:31" (3/3) ... [2019-11-23 21:23:31,754 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label30.c [2019-11-23 21:23:31,763 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:23:31,772 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:23:31,783 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:23:31,818 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:23:31,818 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:23:31,818 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:23:31,818 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:23:31,819 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:23:31,819 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:23:31,819 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:23:31,819 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:23:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:23:31,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 21:23:31,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:31,858 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] [2019-11-23 21:23:31,859 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:31,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:31,864 INFO L82 PathProgramCache]: Analyzing trace with hash 712930081, now seen corresponding path program 1 times [2019-11-23 21:23:31,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:31,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746238588] [2019-11-23 21:23:31,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:32,191 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 21:23:32,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746238588] [2019-11-23 21:23:32,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:32,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:32,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624686004] [2019-11-23 21:23:32,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:32,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:32,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:32,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:32,217 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:23:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:39,828 INFO L93 Difference]: Finished difference Result 2914 states and 5662 transitions. [2019-11-23 21:23:39,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:39,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-11-23 21:23:39,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:39,871 INFO L225 Difference]: With dead ends: 2914 [2019-11-23 21:23:39,871 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:23:39,886 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 21:23:39,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:23:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-23 21:23:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:23:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3262 transitions. [2019-11-23 21:23:40,089 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3262 transitions. Word has length 43 [2019-11-23 21:23:40,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:40,090 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3262 transitions. [2019-11-23 21:23:40,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3262 transitions. [2019-11-23 21:23:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-23 21:23:40,105 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:40,106 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, 1, 1, 1, 1, 1, 1, 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 21:23:40,107 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:40,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:40,108 INFO L82 PathProgramCache]: Analyzing trace with hash -789389070, now seen corresponding path program 1 times [2019-11-23 21:23:40,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:40,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011374897] [2019-11-23 21:23:40,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:23:40,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011374897] [2019-11-23 21:23:40,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:40,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:23:40,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229478364] [2019-11-23 21:23:40,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:40,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:40,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:40,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:40,348 INFO L87 Difference]: Start difference. First operand 2074 states and 3262 transitions. Second operand 4 states. [2019-11-23 21:23:44,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:44,750 INFO L93 Difference]: Finished difference Result 6216 states and 9781 transitions. [2019-11-23 21:23:44,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:44,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2019-11-23 21:23:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:44,778 INFO L225 Difference]: With dead ends: 6216 [2019-11-23 21:23:44,779 INFO L226 Difference]: Without dead ends: 4144 [2019-11-23 21:23:44,784 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 21:23:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2019-11-23 21:23:44,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2019-11-23 21:23:44,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4144 states. [2019-11-23 21:23:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5537 transitions. [2019-11-23 21:23:44,908 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5537 transitions. Word has length 108 [2019-11-23 21:23:44,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:44,911 INFO L462 AbstractCegarLoop]: Abstraction has 4144 states and 5537 transitions. [2019-11-23 21:23:44,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:23:44,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5537 transitions. [2019-11-23 21:23:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-11-23 21:23:44,928 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:44,929 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:44,929 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:44,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:44,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1124150662, now seen corresponding path program 1 times [2019-11-23 21:23:44,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:44,931 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032596136] [2019-11-23 21:23:44,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-23 21:23:45,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032596136] [2019-11-23 21:23:45,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:45,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:45,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541644433] [2019-11-23 21:23:45,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:23:45,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:45,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:23:45,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:23:45,440 INFO L87 Difference]: Start difference. First operand 4144 states and 5537 transitions. Second operand 5 states. [2019-11-23 21:23:51,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:51,345 INFO L93 Difference]: Finished difference Result 13806 states and 18082 transitions. [2019-11-23 21:23:51,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:23:51,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 226 [2019-11-23 21:23:51,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:51,391 INFO L225 Difference]: With dead ends: 13806 [2019-11-23 21:23:51,391 INFO L226 Difference]: Without dead ends: 9664 [2019-11-23 21:23:51,398 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2019-11-23 21:23:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 8974. [2019-11-23 21:23:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8974 states. [2019-11-23 21:23:51,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10715 transitions. [2019-11-23 21:23:51,557 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10715 transitions. Word has length 226 [2019-11-23 21:23:51,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:51,558 INFO L462 AbstractCegarLoop]: Abstraction has 8974 states and 10715 transitions. [2019-11-23 21:23:51,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:23:51,558 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10715 transitions. [2019-11-23 21:23:51,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-11-23 21:23:51,569 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:51,570 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:51,570 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:51,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:51,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2132811422, now seen corresponding path program 1 times [2019-11-23 21:23:51,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:51,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657752501] [2019-11-23 21:23:51,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 310 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 21:23:52,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657752501] [2019-11-23 21:23:52,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64001229] [2019-11-23 21:23:52,242 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 21:23:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:52,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:23:52,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:23:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 21:23:52,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:23:52,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:23:52,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859028332] [2019-11-23 21:23:52,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:23:52,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:52,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:23:52,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:52,639 INFO L87 Difference]: Start difference. First operand 8974 states and 10715 transitions. Second operand 3 states. [2019-11-23 21:23:56,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:23:56,394 INFO L93 Difference]: Finished difference Result 22086 states and 27009 transitions. [2019-11-23 21:23:56,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:23:56,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 408 [2019-11-23 21:23:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:23:56,447 INFO L225 Difference]: With dead ends: 22086 [2019-11-23 21:23:56,447 INFO L226 Difference]: Without dead ends: 13114 [2019-11-23 21:23:56,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 407 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:23:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13114 states. [2019-11-23 21:23:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13114 to 13114. [2019-11-23 21:23:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13114 states. [2019-11-23 21:23:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13114 states to 13114 states and 15840 transitions. [2019-11-23 21:23:56,668 INFO L78 Accepts]: Start accepts. Automaton has 13114 states and 15840 transitions. Word has length 408 [2019-11-23 21:23:56,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:23:56,669 INFO L462 AbstractCegarLoop]: Abstraction has 13114 states and 15840 transitions. [2019-11-23 21:23:56,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:23:56,670 INFO L276 IsEmpty]: Start isEmpty. Operand 13114 states and 15840 transitions. [2019-11-23 21:23:56,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2019-11-23 21:23:56,680 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:23:56,680 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:23:56,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:23:56,887 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:23:56,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:23:56,888 INFO L82 PathProgramCache]: Analyzing trace with hash -156015359, now seen corresponding path program 1 times [2019-11-23 21:23:56,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:23:56,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610924529] [2019-11-23 21:23:56,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:23:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:23:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 21:23:57,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610924529] [2019-11-23 21:23:57,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:23:57,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:23:57,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913867248] [2019-11-23 21:23:57,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:23:57,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:23:57,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:23:57,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:23:57,177 INFO L87 Difference]: Start difference. First operand 13114 states and 15840 transitions. Second operand 4 states. [2019-11-23 21:24:03,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:03,580 INFO L93 Difference]: Finished difference Result 44166 states and 54394 transitions. [2019-11-23 21:24:03,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:03,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 414 [2019-11-23 21:24:03,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:03,661 INFO L225 Difference]: With dead ends: 44166 [2019-11-23 21:24:03,662 INFO L226 Difference]: Without dead ends: 31054 [2019-11-23 21:24:03,679 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 21:24:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31054 states. [2019-11-23 21:24:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31054 to 30364. [2019-11-23 21:24:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30364 states. [2019-11-23 21:24:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30364 states to 30364 states and 36096 transitions. [2019-11-23 21:24:04,116 INFO L78 Accepts]: Start accepts. Automaton has 30364 states and 36096 transitions. Word has length 414 [2019-11-23 21:24:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:04,118 INFO L462 AbstractCegarLoop]: Abstraction has 30364 states and 36096 transitions. [2019-11-23 21:24:04,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 30364 states and 36096 transitions. [2019-11-23 21:24:04,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2019-11-23 21:24:04,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:04,139 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:04,139 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:04,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:04,140 INFO L82 PathProgramCache]: Analyzing trace with hash 658097238, now seen corresponding path program 1 times [2019-11-23 21:24:04,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:04,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255069572] [2019-11-23 21:24:04,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 430 proven. 3 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 21:24:05,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255069572] [2019-11-23 21:24:05,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786466] [2019-11-23 21:24:05,032 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 21:24:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:05,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:05,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 363 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2019-11-23 21:24:05,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:05,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:05,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329424128] [2019-11-23 21:24:05,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:05,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:05,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:05,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:05,430 INFO L87 Difference]: Start difference. First operand 30364 states and 36096 transitions. Second operand 3 states. [2019-11-23 21:24:08,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:08,710 INFO L93 Difference]: Finished difference Result 60036 states and 71488 transitions. [2019-11-23 21:24:08,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:08,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 576 [2019-11-23 21:24:08,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:08,784 INFO L225 Difference]: With dead ends: 60036 [2019-11-23 21:24:08,784 INFO L226 Difference]: Without dead ends: 30364 [2019-11-23 21:24:08,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 575 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30364 states. [2019-11-23 21:24:09,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30364 to 30364. [2019-11-23 21:24:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30364 states. [2019-11-23 21:24:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30364 states to 30364 states and 34972 transitions. [2019-11-23 21:24:09,370 INFO L78 Accepts]: Start accepts. Automaton has 30364 states and 34972 transitions. Word has length 576 [2019-11-23 21:24:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:09,371 INFO L462 AbstractCegarLoop]: Abstraction has 30364 states and 34972 transitions. [2019-11-23 21:24:09,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 30364 states and 34972 transitions. [2019-11-23 21:24:09,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 740 [2019-11-23 21:24:09,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:09,411 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:09,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:09,632 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:09,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:09,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1674908, now seen corresponding path program 1 times [2019-11-23 21:24:09,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:09,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357489783] [2019-11-23 21:24:09,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 427 proven. 3 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-23 21:24:10,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357489783] [2019-11-23 21:24:10,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837389397] [2019-11-23 21:24:10,529 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 21:24:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:10,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 21:24:10,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-23 21:24:11,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:11,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-11-23 21:24:11,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820895746] [2019-11-23 21:24:11,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:11,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:11,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:11,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:11,175 INFO L87 Difference]: Start difference. First operand 30364 states and 34972 transitions. Second operand 4 states. [2019-11-23 21:24:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:14,827 INFO L93 Difference]: Finished difference Result 60142 states and 69346 transitions. [2019-11-23 21:24:14,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:14,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 739 [2019-11-23 21:24:14,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:14,869 INFO L225 Difference]: With dead ends: 60142 [2019-11-23 21:24:14,869 INFO L226 Difference]: Without dead ends: 30364 [2019-11-23 21:24:14,891 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 738 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:14,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30364 states. [2019-11-23 21:24:15,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30364 to 29674. [2019-11-23 21:24:15,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29674 states. [2019-11-23 21:24:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29674 states to 29674 states and 32117 transitions. [2019-11-23 21:24:15,334 INFO L78 Accepts]: Start accepts. Automaton has 29674 states and 32117 transitions. Word has length 739 [2019-11-23 21:24:15,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:15,335 INFO L462 AbstractCegarLoop]: Abstraction has 29674 states and 32117 transitions. [2019-11-23 21:24:15,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:15,335 INFO L276 IsEmpty]: Start isEmpty. Operand 29674 states and 32117 transitions. [2019-11-23 21:24:15,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2019-11-23 21:24:15,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:15,375 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:24:15,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:15,589 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:15,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:15,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1740204183, now seen corresponding path program 1 times [2019-11-23 21:24:15,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:15,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700181123] [2019-11-23 21:24:15,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2019-11-23 21:24:16,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700181123] [2019-11-23 21:24:16,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:16,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:24:16,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217710131] [2019-11-23 21:24:16,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:16,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:16,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:16,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:24:16,480 INFO L87 Difference]: Start difference. First operand 29674 states and 32117 transitions. Second operand 3 states. [2019-11-23 21:24:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:19,681 INFO L93 Difference]: Finished difference Result 71766 states and 78593 transitions. [2019-11-23 21:24:19,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:19,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 833 [2019-11-23 21:24:19,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:19,725 INFO L225 Difference]: With dead ends: 71766 [2019-11-23 21:24:19,725 INFO L226 Difference]: Without dead ends: 42784 [2019-11-23 21:24:19,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:24:19,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42784 states. [2019-11-23 21:24:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42784 to 40024. [2019-11-23 21:24:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40024 states. [2019-11-23 21:24:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40024 states to 40024 states and 43882 transitions. [2019-11-23 21:24:20,253 INFO L78 Accepts]: Start accepts. Automaton has 40024 states and 43882 transitions. Word has length 833 [2019-11-23 21:24:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:20,254 INFO L462 AbstractCegarLoop]: Abstraction has 40024 states and 43882 transitions. [2019-11-23 21:24:20,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 40024 states and 43882 transitions. [2019-11-23 21:24:20,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 886 [2019-11-23 21:24:20,283 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:20,284 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:24:20,284 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:20,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:20,285 INFO L82 PathProgramCache]: Analyzing trace with hash 452739608, now seen corresponding path program 1 times [2019-11-23 21:24:20,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:20,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836124543] [2019-11-23 21:24:20,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 702 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 21:24:21,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836124543] [2019-11-23 21:24:21,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:21,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:21,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338225667] [2019-11-23 21:24:21,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:21,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:21,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:21,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:21,334 INFO L87 Difference]: Start difference. First operand 40024 states and 43882 transitions. Second operand 4 states. [2019-11-23 21:24:26,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:26,837 INFO L93 Difference]: Finished difference Result 93846 states and 104391 transitions. [2019-11-23 21:24:26,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:26,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 885 [2019-11-23 21:24:26,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:26,885 INFO L225 Difference]: With dead ends: 93846 [2019-11-23 21:24:26,885 INFO L226 Difference]: Without dead ends: 54514 [2019-11-23 21:24:26,901 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 21:24:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54514 states. [2019-11-23 21:24:27,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54514 to 53134. [2019-11-23 21:24:27,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53134 states. [2019-11-23 21:24:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53134 states to 53134 states and 57704 transitions. [2019-11-23 21:24:27,575 INFO L78 Accepts]: Start accepts. Automaton has 53134 states and 57704 transitions. Word has length 885 [2019-11-23 21:24:27,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:27,576 INFO L462 AbstractCegarLoop]: Abstraction has 53134 states and 57704 transitions. [2019-11-23 21:24:27,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 53134 states and 57704 transitions. [2019-11-23 21:24:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 983 [2019-11-23 21:24:27,613 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:27,614 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:24:27,614 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:27,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1428982155, now seen corresponding path program 1 times [2019-11-23 21:24:27,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:27,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998359985] [2019-11-23 21:24:27,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 797 proven. 5 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-23 21:24:29,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998359985] [2019-11-23 21:24:29,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812611951] [2019-11-23 21:24:29,323 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 21:24:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:29,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:29,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 797 proven. 0 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2019-11-23 21:24:30,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:30,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2019-11-23 21:24:30,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786468412] [2019-11-23 21:24:30,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:30,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:30,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:30,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:24:30,116 INFO L87 Difference]: Start difference. First operand 53134 states and 57704 transitions. Second operand 3 states. [2019-11-23 21:24:33,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:33,032 INFO L93 Difference]: Finished difference Result 115236 states and 124832 transitions. [2019-11-23 21:24:33,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:33,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 982 [2019-11-23 21:24:33,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:33,087 INFO L225 Difference]: With dead ends: 115236 [2019-11-23 21:24:33,087 INFO L226 Difference]: Without dead ends: 62794 [2019-11-23 21:24:33,115 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 981 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:24:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62794 states. [2019-11-23 21:24:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62794 to 61414. [2019-11-23 21:24:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61414 states. [2019-11-23 21:24:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61414 states to 61414 states and 65694 transitions. [2019-11-23 21:24:33,683 INFO L78 Accepts]: Start accepts. Automaton has 61414 states and 65694 transitions. Word has length 982 [2019-11-23 21:24:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:33,683 INFO L462 AbstractCegarLoop]: Abstraction has 61414 states and 65694 transitions. [2019-11-23 21:24:33,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 61414 states and 65694 transitions. [2019-11-23 21:24:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1123 [2019-11-23 21:24:33,710 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:33,710 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:24:33,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:33,915 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:33,916 INFO L82 PathProgramCache]: Analyzing trace with hash 48546690, now seen corresponding path program 1 times [2019-11-23 21:24:33,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:33,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720135066] [2019-11-23 21:24:33,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 1222 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2019-11-23 21:24:34,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720135066] [2019-11-23 21:24:34,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:34,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:34,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804509217] [2019-11-23 21:24:34,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:34,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:34,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:34,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:34,928 INFO L87 Difference]: Start difference. First operand 61414 states and 65694 transitions. Second operand 4 states. [2019-11-23 21:24:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:40,347 INFO L93 Difference]: Finished difference Result 138696 states and 148761 transitions. [2019-11-23 21:24:40,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:40,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1122 [2019-11-23 21:24:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:40,411 INFO L225 Difference]: With dead ends: 138696 [2019-11-23 21:24:40,411 INFO L226 Difference]: Without dead ends: 77974 [2019-11-23 21:24:40,434 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 21:24:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77974 states.