/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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:24:46,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:24:46,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:24:46,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:24:46,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:24:46,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:24:46,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:24:46,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:24:46,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:24:46,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:24:46,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:24:46,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:24:46,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:24:46,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:24:46,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:24:46,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:24:46,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:24:46,674 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 21:24:46,688 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:24:46,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:24:46,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:24:46,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:24:46,690 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:24:46,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:24:46,690 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:24:46,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:24:46,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:24:46,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:24:46,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:24:46,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:24:46,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:24:46,691 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:24:46,692 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:24:46,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:24:46,692 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:24:46,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:24:46,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:24:46,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:24:46,693 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:24:46,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:24:46,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:24:46,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:24:46,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:24:46,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:24:46,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:24:46,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:24:46,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:24:46,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:24:46,983 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:24:46,996 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:24:46,999 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:24:47,000 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:24:47,001 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:24:47,002 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label54.c [2019-11-23 21:24:47,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f638887e/1c9b514e15194459bc6dd3a92d0e7c80/FLAG7954a3178 [2019-11-23 21:24:47,803 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:24:47,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label54.c [2019-11-23 21:24:47,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f638887e/1c9b514e15194459bc6dd3a92d0e7c80/FLAG7954a3178 [2019-11-23 21:24:47,907 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f638887e/1c9b514e15194459bc6dd3a92d0e7c80 [2019-11-23 21:24:47,916 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:24:47,918 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:24:47,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:24:47,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:24:47,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:24:47,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:47" (1/1) ... [2019-11-23 21:24:47,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f9a1ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:47, skipping insertion in model container [2019-11-23 21:24:47,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:47" (1/1) ... [2019-11-23 21:24:47,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:24:48,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:24:49,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:24:49,251 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:24:49,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:24:49,791 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:24:49,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:49 WrapperNode [2019-11-23 21:24:49,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:24:49,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:24:49,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:24:49,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:24:49,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:49" (1/1) ... [2019-11-23 21:24:49,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:49" (1/1) ... [2019-11-23 21:24:50,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:24:50,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:24:50,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:24:50,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:24:50,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:49" (1/1) ... [2019-11-23 21:24:50,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:49" (1/1) ... [2019-11-23 21:24:50,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:49" (1/1) ... [2019-11-23 21:24:50,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:49" (1/1) ... [2019-11-23 21:24:50,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:49" (1/1) ... [2019-11-23 21:24:50,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:49" (1/1) ... [2019-11-23 21:24:50,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:49" (1/1) ... [2019-11-23 21:24:50,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:24:50,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:24:50,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:24:50,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:24:50,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:49" (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 21:24:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:24:50,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:24:54,104 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:24:54,104 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:24:54,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:54 BoogieIcfgContainer [2019-11-23 21:24:54,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:24:54,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:24:54,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:24:54,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:24:54,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:24:47" (1/3) ... [2019-11-23 21:24:54,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5366618c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:54, skipping insertion in model container [2019-11-23 21:24:54,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:49" (2/3) ... [2019-11-23 21:24:54,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5366618c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:54, skipping insertion in model container [2019-11-23 21:24:54,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:54" (3/3) ... [2019-11-23 21:24:54,124 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label54.c [2019-11-23 21:24:54,134 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:24:54,143 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:24:54,155 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:24:54,202 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:24:54,202 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:24:54,202 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:24:54,202 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:24:54,203 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:24:54,203 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:24:54,204 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:24:54,204 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:24:54,241 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:24:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 21:24:54,248 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:54,250 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] [2019-11-23 21:24:54,250 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:54,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:54,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1089129850, now seen corresponding path program 1 times [2019-11-23 21:24:54,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:54,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100145016] [2019-11-23 21:24:54,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:54,504 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 21:24:54,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100145016] [2019-11-23 21:24:54,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:54,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:24:54,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447050902] [2019-11-23 21:24:54,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:54,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:54,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:54,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:54,530 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:25:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:01,235 INFO L93 Difference]: Finished difference Result 2898 states and 5646 transitions. [2019-11-23 21:25:01,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:01,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-11-23 21:25:01,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:01,289 INFO L225 Difference]: With dead ends: 2898 [2019-11-23 21:25:01,289 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:25:01,305 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 21:25:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:25:01,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-23 21:25:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:25:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3490 transitions. [2019-11-23 21:25:01,509 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3490 transitions. Word has length 34 [2019-11-23 21:25:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:01,510 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3490 transitions. [2019-11-23 21:25:01,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3490 transitions. [2019-11-23 21:25:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-23 21:25:01,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:01,521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:01,522 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:01,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:01,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1367185622, now seen corresponding path program 1 times [2019-11-23 21:25:01,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:01,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62148580] [2019-11-23 21:25:01,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:25:01,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62148580] [2019-11-23 21:25:01,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:01,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:25:01,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008285769] [2019-11-23 21:25:01,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:01,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:01,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:01,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:01,834 INFO L87 Difference]: Start difference. First operand 2074 states and 3490 transitions. Second operand 4 states. [2019-11-23 21:25:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:07,476 INFO L93 Difference]: Finished difference Result 8286 states and 13952 transitions. [2019-11-23 21:25:07,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:07,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-11-23 21:25:07,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:07,517 INFO L225 Difference]: With dead ends: 8286 [2019-11-23 21:25:07,517 INFO L226 Difference]: Without dead ends: 6214 [2019-11-23 21:25:07,524 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 21:25:07,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2019-11-23 21:25:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 5524. [2019-11-23 21:25:07,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5524 states. [2019-11-23 21:25:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 8154 transitions. [2019-11-23 21:25:07,633 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 8154 transitions. Word has length 118 [2019-11-23 21:25:07,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:07,634 INFO L462 AbstractCegarLoop]: Abstraction has 5524 states and 8154 transitions. [2019-11-23 21:25:07,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:07,634 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 8154 transitions. [2019-11-23 21:25:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-23 21:25:07,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:07,639 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:25:07,639 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:07,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:07,639 INFO L82 PathProgramCache]: Analyzing trace with hash -680045318, now seen corresponding path program 1 times [2019-11-23 21:25:07,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:07,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14095588] [2019-11-23 21:25:07,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 21:25:07,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14095588] [2019-11-23 21:25:07,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:07,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:25:07,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410341655] [2019-11-23 21:25:07,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:07,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:07,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:07,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:07,820 INFO L87 Difference]: Start difference. First operand 5524 states and 8154 transitions. Second operand 4 states. [2019-11-23 21:25:14,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:14,023 INFO L93 Difference]: Finished difference Result 22086 states and 32608 transitions. [2019-11-23 21:25:14,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:14,024 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 232 [2019-11-23 21:25:14,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:14,091 INFO L225 Difference]: With dead ends: 22086 [2019-11-23 21:25:14,091 INFO L226 Difference]: Without dead ends: 16564 [2019-11-23 21:25:14,102 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 21:25:14,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16564 states. [2019-11-23 21:25:14,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16564 to 10354. [2019-11-23 21:25:14,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10354 states. [2019-11-23 21:25:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10354 states to 10354 states and 13812 transitions. [2019-11-23 21:25:14,332 INFO L78 Accepts]: Start accepts. Automaton has 10354 states and 13812 transitions. Word has length 232 [2019-11-23 21:25:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:14,333 INFO L462 AbstractCegarLoop]: Abstraction has 10354 states and 13812 transitions. [2019-11-23 21:25:14,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 10354 states and 13812 transitions. [2019-11-23 21:25:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-11-23 21:25:14,337 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:14,338 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:25:14,338 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:14,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:14,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1872149017, now seen corresponding path program 1 times [2019-11-23 21:25:14,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:14,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783811532] [2019-11-23 21:25:14,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 21:25:14,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783811532] [2019-11-23 21:25:14,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:14,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:14,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707366333] [2019-11-23 21:25:14,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:25:14,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:14,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:25:14,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:25:14,801 INFO L87 Difference]: Start difference. First operand 10354 states and 13812 transitions. Second operand 5 states. [2019-11-23 21:25:20,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:20,476 INFO L93 Difference]: Finished difference Result 25536 states and 33280 transitions. [2019-11-23 21:25:20,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:20,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 285 [2019-11-23 21:25:20,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:20,513 INFO L225 Difference]: With dead ends: 25536 [2019-11-23 21:25:20,514 INFO L226 Difference]: Without dead ends: 15184 [2019-11-23 21:25:20,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:25:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15184 states. [2019-11-23 21:25:20,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15184 to 14494. [2019-11-23 21:25:20,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14494 states. [2019-11-23 21:25:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14494 states to 14494 states and 18294 transitions. [2019-11-23 21:25:20,771 INFO L78 Accepts]: Start accepts. Automaton has 14494 states and 18294 transitions. Word has length 285 [2019-11-23 21:25:20,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:20,772 INFO L462 AbstractCegarLoop]: Abstraction has 14494 states and 18294 transitions. [2019-11-23 21:25:20,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:25:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 14494 states and 18294 transitions. [2019-11-23 21:25:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2019-11-23 21:25:20,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:20,789 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:20,790 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:20,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:20,790 INFO L82 PathProgramCache]: Analyzing trace with hash -2000725902, now seen corresponding path program 1 times [2019-11-23 21:25:20,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:20,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707623474] [2019-11-23 21:25:20,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 360 proven. 3 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-11-23 21:25:21,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707623474] [2019-11-23 21:25:21,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759817219] [2019-11-23 21:25:21,454 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 21:25:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:21,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:25:21,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:25:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2019-11-23 21:25:21,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:25:21,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:25:21,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047362812] [2019-11-23 21:25:21,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:25:21,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:21,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:25:21,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:25:21,905 INFO L87 Difference]: Start difference. First operand 14494 states and 18294 transitions. Second operand 3 states. [2019-11-23 21:25:25,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:25,450 INFO L93 Difference]: Finished difference Result 28986 states and 36586 transitions. [2019-11-23 21:25:25,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:25:25,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2019-11-23 21:25:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:25,482 INFO L225 Difference]: With dead ends: 28986 [2019-11-23 21:25:25,482 INFO L226 Difference]: Without dead ends: 14494 [2019-11-23 21:25:25,494 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 466 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 21:25:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14494 states. [2019-11-23 21:25:25,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14494 to 14494. [2019-11-23 21:25:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14494 states. [2019-11-23 21:25:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14494 states to 14494 states and 16871 transitions. [2019-11-23 21:25:25,680 INFO L78 Accepts]: Start accepts. Automaton has 14494 states and 16871 transitions. Word has length 467 [2019-11-23 21:25:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:25,681 INFO L462 AbstractCegarLoop]: Abstraction has 14494 states and 16871 transitions. [2019-11-23 21:25:25,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:25:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 14494 states and 16871 transitions. [2019-11-23 21:25:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2019-11-23 21:25:25,691 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:25,692 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:25:25,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:25:25,897 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:25,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:25,898 INFO L82 PathProgramCache]: Analyzing trace with hash 471892078, now seen corresponding path program 1 times [2019-11-23 21:25:25,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:25,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841411535] [2019-11-23 21:25:25,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 430 proven. 3 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2019-11-23 21:25:26,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841411535] [2019-11-23 21:25:26,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743989173] [2019-11-23 21:25:26,744 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 21:25:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:26,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:25:26,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:25:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 468 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-11-23 21:25:27,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:25:27,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:25:27,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857026851] [2019-11-23 21:25:27,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:25:27,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:27,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:25:27,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:25:27,036 INFO L87 Difference]: Start difference. First operand 14494 states and 16871 transitions. Second operand 3 states. [2019-11-23 21:25:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:30,626 INFO L93 Difference]: Finished difference Result 33126 states and 38714 transitions. [2019-11-23 21:25:30,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:25:30,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2019-11-23 21:25:30,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:30,659 INFO L225 Difference]: With dead ends: 33126 [2019-11-23 21:25:30,659 INFO L226 Difference]: Without dead ends: 17254 [2019-11-23 21:25:30,674 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 486 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:25:30,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17254 states. [2019-11-23 21:25:30,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17254 to 17254. [2019-11-23 21:25:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17254 states. [2019-11-23 21:25:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17254 states to 17254 states and 18397 transitions. [2019-11-23 21:25:30,881 INFO L78 Accepts]: Start accepts. Automaton has 17254 states and 18397 transitions. Word has length 487 [2019-11-23 21:25:30,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:30,882 INFO L462 AbstractCegarLoop]: Abstraction has 17254 states and 18397 transitions. [2019-11-23 21:25:30,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:25:30,883 INFO L276 IsEmpty]: Start isEmpty. Operand 17254 states and 18397 transitions. [2019-11-23 21:25:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 654 [2019-11-23 21:25:30,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:30,909 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:31,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:25:31,114 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:31,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1270835268, now seen corresponding path program 1 times [2019-11-23 21:25:31,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:31,116 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34507471] [2019-11-23 21:25:31,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 453 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 21:25:31,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34507471] [2019-11-23 21:25:31,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:31,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:31,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28273778] [2019-11-23 21:25:31,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:31,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:31,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:31,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:31,732 INFO L87 Difference]: Start difference. First operand 17254 states and 18397 transitions. Second operand 4 states. [2019-11-23 21:25:36,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:36,590 INFO L93 Difference]: Finished difference Result 58656 states and 62866 transitions. [2019-11-23 21:25:36,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:36,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 653 [2019-11-23 21:25:36,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:36,649 INFO L225 Difference]: With dead ends: 58656 [2019-11-23 21:25:36,649 INFO L226 Difference]: Without dead ends: 41404 [2019-11-23 21:25:36,669 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 21:25:36,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41404 states. [2019-11-23 21:25:37,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41404 to 39334. [2019-11-23 21:25:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39334 states. [2019-11-23 21:25:37,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39334 states to 39334 states and 41633 transitions. [2019-11-23 21:25:37,126 INFO L78 Accepts]: Start accepts. Automaton has 39334 states and 41633 transitions. Word has length 653 [2019-11-23 21:25:37,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:37,126 INFO L462 AbstractCegarLoop]: Abstraction has 39334 states and 41633 transitions. [2019-11-23 21:25:37,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:37,127 INFO L276 IsEmpty]: Start isEmpty. Operand 39334 states and 41633 transitions. [2019-11-23 21:25:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2019-11-23 21:25:37,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:37,139 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:37,140 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:37,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:37,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1299660743, now seen corresponding path program 1 times [2019-11-23 21:25:37,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:37,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744866909] [2019-11-23 21:25:37,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2019-11-23 21:25:38,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744866909] [2019-11-23 21:25:38,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:38,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:25:38,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82372361] [2019-11-23 21:25:38,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:25:38,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:38,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:25:38,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:25:38,787 INFO L87 Difference]: Start difference. First operand 39334 states and 41633 transitions. Second operand 3 states. [2019-11-23 21:25:41,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:41,440 INFO L93 Difference]: Finished difference Result 78666 states and 83264 transitions. [2019-11-23 21:25:41,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:25:41,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 667 [2019-11-23 21:25:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:41,489 INFO L225 Difference]: With dead ends: 78666 [2019-11-23 21:25:41,489 INFO L226 Difference]: Without dead ends: 39334 [2019-11-23 21:25:41,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 3 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 21:25:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39334 states. [2019-11-23 21:25:41,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39334 to 39334. [2019-11-23 21:25:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39334 states. [2019-11-23 21:25:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39334 states to 39334 states and 41313 transitions. [2019-11-23 21:25:41,946 INFO L78 Accepts]: Start accepts. Automaton has 39334 states and 41313 transitions. Word has length 667 [2019-11-23 21:25:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:41,947 INFO L462 AbstractCegarLoop]: Abstraction has 39334 states and 41313 transitions. [2019-11-23 21:25:41,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:25:41,947 INFO L276 IsEmpty]: Start isEmpty. Operand 39334 states and 41313 transitions. [2019-11-23 21:25:41,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2019-11-23 21:25:41,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:41,964 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:41,964 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:41,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1552065038, now seen corresponding path program 1 times [2019-11-23 21:25:41,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:41,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946851969] [2019-11-23 21:25:41,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 477 proven. 0 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2019-11-23 21:25:42,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946851969] [2019-11-23 21:25:42,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:42,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:42,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937182959] [2019-11-23 21:25:42,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:42,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:42,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:42,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:42,773 INFO L87 Difference]: Start difference. First operand 39334 states and 41313 transitions. Second operand 4 states. [2019-11-23 21:25:47,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:47,523 INFO L93 Difference]: Finished difference Result 82806 states and 86936 transitions. [2019-11-23 21:25:47,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:47,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 703 [2019-11-23 21:25:47,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:47,574 INFO L225 Difference]: With dead ends: 82806 [2019-11-23 21:25:47,574 INFO L226 Difference]: Without dead ends: 42784 [2019-11-23 21:25:47,794 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:47,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42784 states. [2019-11-23 21:25:48,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42784 to 42094. [2019-11-23 21:25:48,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42094 states. [2019-11-23 21:25:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42094 states to 42094 states and 43411 transitions. [2019-11-23 21:25:48,221 INFO L78 Accepts]: Start accepts. Automaton has 42094 states and 43411 transitions. Word has length 703 [2019-11-23 21:25:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:48,223 INFO L462 AbstractCegarLoop]: Abstraction has 42094 states and 43411 transitions. [2019-11-23 21:25:48,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 42094 states and 43411 transitions. [2019-11-23 21:25:48,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 853 [2019-11-23 21:25:48,254 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:48,255 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:25:48,255 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:48,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:48,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1685858015, now seen corresponding path program 1 times [2019-11-23 21:25:48,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:48,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925035060] [2019-11-23 21:25:48,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 1119 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-11-23 21:25:49,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925035060] [2019-11-23 21:25:49,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:49,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:49,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944950767] [2019-11-23 21:25:49,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:49,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:49,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:49,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:49,031 INFO L87 Difference]: Start difference. First operand 42094 states and 43411 transitions. Second operand 4 states. [2019-11-23 21:25:53,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:53,755 INFO L93 Difference]: Finished difference Result 97296 states and 100460 transitions. [2019-11-23 21:25:53,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:53,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 852 [2019-11-23 21:25:53,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:53,831 INFO L225 Difference]: With dead ends: 97296 [2019-11-23 21:25:53,831 INFO L226 Difference]: Without dead ends: 54514 [2019-11-23 21:25:53,857 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 21:25:55,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54514 states. [2019-11-23 21:25:55,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54514 to 50374. [2019-11-23 21:25:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50374 states. [2019-11-23 21:25:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50374 states to 50374 states and 51683 transitions. [2019-11-23 21:25:55,748 INFO L78 Accepts]: Start accepts. Automaton has 50374 states and 51683 transitions. Word has length 852 [2019-11-23 21:25:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:55,749 INFO L462 AbstractCegarLoop]: Abstraction has 50374 states and 51683 transitions. [2019-11-23 21:25:55,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 50374 states and 51683 transitions. [2019-11-23 21:25:55,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 985 [2019-11-23 21:25:55,784 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:55,785 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2019-11-23 21:25:55,786 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:55,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1205943021, now seen corresponding path program 1 times [2019-11-23 21:25:55,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:55,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089427953] [2019-11-23 21:25:55,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 941 trivial. 0 not checked. [2019-11-23 21:25:56,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089427953] [2019-11-23 21:25:56,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:56,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:56,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495039461] [2019-11-23 21:25:56,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:56,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:56,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:56,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:56,868 INFO L87 Difference]: Start difference. First operand 50374 states and 51683 transitions. Second operand 4 states. [2019-11-23 21:26:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:26:01,057 INFO L93 Difference]: Finished difference Result 109716 states and 112695 transitions. [2019-11-23 21:26:01,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:26:01,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 984 [2019-11-23 21:26:01,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:26:01,100 INFO L225 Difference]: With dead ends: 109716 [2019-11-23 21:26:01,100 INFO L226 Difference]: Without dead ends: 59344 [2019-11-23 21:26:01,125 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 21:26:01,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59344 states. [2019-11-23 21:26:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59344 to 57274. [2019-11-23 21:26:01,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57274 states. [2019-11-23 21:26:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57274 states to 57274 states and 58698 transitions. [2019-11-23 21:26:01,744 INFO L78 Accepts]: Start accepts. Automaton has 57274 states and 58698 transitions. Word has length 984 [2019-11-23 21:26:01,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:26:01,744 INFO L462 AbstractCegarLoop]: Abstraction has 57274 states and 58698 transitions. [2019-11-23 21:26:01,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:26:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 57274 states and 58698 transitions. [2019-11-23 21:26:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1579 [2019-11-23 21:26:01,778 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:26:01,779 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:26:01,779 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:26:01,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:26:01,780 INFO L82 PathProgramCache]: Analyzing trace with hash -911767125, now seen corresponding path program 1 times [2019-11-23 21:26:01,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:26:01,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140402025] [2019-11-23 21:26:01,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:26:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:26:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2382 backedges. 1219 proven. 0 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2019-11-23 21:26:04,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140402025] [2019-11-23 21:26:04,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:26:04,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:26:04,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52024269] [2019-11-23 21:26:04,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:26:04,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:26:04,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:26:04,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:26:04,081 INFO L87 Difference]: Start difference. First operand 57274 states and 58698 transitions. Second operand 3 states.