/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/Problem11_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:05:38,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:05:38,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:05:38,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:05:38,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:05:38,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:05:38,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:05:38,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:05:38,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:05:38,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:05:38,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:05:38,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:05:38,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:05:38,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:05:38,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:05:38,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:05:38,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:05:38,886 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 21:05:38,901 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:05:38,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:05:38,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:05:38,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:05:38,905 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:05:38,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:05:38,905 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:05:38,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:05:38,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:05:38,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:05:38,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:05:38,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:05:38,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:05:38,907 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:05:38,908 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:05:38,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:05:38,908 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:05:38,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:05:38,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:05:38,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:05:38,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:05:38,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:05:38,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:05:38,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:05:38,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:05:38,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:05:38,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:05:38,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:05:38,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:05:38,913 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:05:39,201 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:05:39,219 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:05:39,223 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:05:39,224 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:05:39,225 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:05:39,225 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label28.c [2019-11-23 21:05:39,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9413a17e/ce962da71d3e470ba33c50864cb4f230/FLAGf203d2114 [2019-11-23 21:05:39,885 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:05:39,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label28.c [2019-11-23 21:05:39,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9413a17e/ce962da71d3e470ba33c50864cb4f230/FLAGf203d2114 [2019-11-23 21:05:40,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9413a17e/ce962da71d3e470ba33c50864cb4f230 [2019-11-23 21:05:40,059 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:05:40,063 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:05:40,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:05:40,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:05:40,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:05:40,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:05:40" (1/1) ... [2019-11-23 21:05:40,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8efd2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:05:40, skipping insertion in model container [2019-11-23 21:05:40,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:05:40" (1/1) ... [2019-11-23 21:05:40,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:05:40,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:05:40,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:05:40,827 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:05:41,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:05:41,318 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:05:41,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:05:41 WrapperNode [2019-11-23 21:05:41,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:05:41,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:05:41,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:05:41,320 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:05:41,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:05:41" (1/1) ... [2019-11-23 21:05:41,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:05:41" (1/1) ... [2019-11-23 21:05:41,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:05:41,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:05:41,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:05:41,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:05:41,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:05:41" (1/1) ... [2019-11-23 21:05:41,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:05:41" (1/1) ... [2019-11-23 21:05:41,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:05:41" (1/1) ... [2019-11-23 21:05:41,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:05:41" (1/1) ... [2019-11-23 21:05:41,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:05:41" (1/1) ... [2019-11-23 21:05:41,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:05:41" (1/1) ... [2019-11-23 21:05:41,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:05:41" (1/1) ... [2019-11-23 21:05:41,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:05:41,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:05:41,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:05:41,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:05:41,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:05:41" (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 21:05:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:05:41,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:05:43,515 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:05:43,515 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 21:05:43,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:05:43 BoogieIcfgContainer [2019-11-23 21:05:43,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:05:43,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:05:43,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:05:43,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:05:43,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:05:40" (1/3) ... [2019-11-23 21:05:43,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d71976a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:05:43, skipping insertion in model container [2019-11-23 21:05:43,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:05:41" (2/3) ... [2019-11-23 21:05:43,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d71976a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:05:43, skipping insertion in model container [2019-11-23 21:05:43,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:05:43" (3/3) ... [2019-11-23 21:05:43,554 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label28.c [2019-11-23 21:05:43,565 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:05:43,573 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:05:43,584 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:05:43,622 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:05:43,623 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:05:43,623 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:05:43,623 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:05:43,624 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:05:43,624 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:05:43,625 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:05:43,625 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:05:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states. [2019-11-23 21:05:43,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 21:05:43,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:05:43,669 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:05:43,669 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:05:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:05:43,675 INFO L82 PathProgramCache]: Analyzing trace with hash 563919826, now seen corresponding path program 1 times [2019-11-23 21:05:43,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:05:43,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508239443] [2019-11-23 21:05:43,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:05:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:05:44,003 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 21:05:44,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508239443] [2019-11-23 21:05:44,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:05:44,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:05:44,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951591147] [2019-11-23 21:05:44,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:05:44,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:05:44,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:05:44,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:05:44,030 INFO L87 Difference]: Start difference. First operand 283 states. Second operand 4 states. [2019-11-23 21:05:46,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:05:46,165 INFO L93 Difference]: Finished difference Result 968 states and 1740 transitions. [2019-11-23 21:05:46,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:05:46,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2019-11-23 21:05:46,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:05:46,191 INFO L225 Difference]: With dead ends: 968 [2019-11-23 21:05:46,191 INFO L226 Difference]: Without dead ends: 602 [2019-11-23 21:05:46,196 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 21:05:46,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2019-11-23 21:05:46,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 407. [2019-11-23 21:05:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2019-11-23 21:05:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 590 transitions. [2019-11-23 21:05:46,278 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 590 transitions. Word has length 48 [2019-11-23 21:05:46,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:05:46,278 INFO L462 AbstractCegarLoop]: Abstraction has 407 states and 590 transitions. [2019-11-23 21:05:46,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:05:46,279 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 590 transitions. [2019-11-23 21:05:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-23 21:05:46,283 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:05:46,283 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 21:05:46,283 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:05:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:05:46,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2122398730, now seen corresponding path program 1 times [2019-11-23 21:05:46,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:05:46,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554936657] [2019-11-23 21:05:46,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:05:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:05:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:05:46,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554936657] [2019-11-23 21:05:46,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:05:46,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:05:46,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320469476] [2019-11-23 21:05:46,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:05:46,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:05:46,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:05:46,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:05:46,484 INFO L87 Difference]: Start difference. First operand 407 states and 590 transitions. Second operand 4 states. [2019-11-23 21:05:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:05:48,248 INFO L93 Difference]: Finished difference Result 1567 states and 2285 transitions. [2019-11-23 21:05:48,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:05:48,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-11-23 21:05:48,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:05:48,256 INFO L225 Difference]: With dead ends: 1567 [2019-11-23 21:05:48,257 INFO L226 Difference]: Without dead ends: 1162 [2019-11-23 21:05:48,260 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 21:05:48,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2019-11-23 21:05:48,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1148. [2019-11-23 21:05:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1148 states. [2019-11-23 21:05:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1565 transitions. [2019-11-23 21:05:48,308 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1565 transitions. Word has length 116 [2019-11-23 21:05:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:05:48,308 INFO L462 AbstractCegarLoop]: Abstraction has 1148 states and 1565 transitions. [2019-11-23 21:05:48,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:05:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1565 transitions. [2019-11-23 21:05:48,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 21:05:48,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:05:48,313 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:05:48,314 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:05:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:05:48,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1068723632, now seen corresponding path program 1 times [2019-11-23 21:05:48,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:05:48,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940213851] [2019-11-23 21:05:48,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:05:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:05:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:05:48,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940213851] [2019-11-23 21:05:48,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:05:48,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:05:48,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748767583] [2019-11-23 21:05:48,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:05:48,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:05:48,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:05:48,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:05:48,461 INFO L87 Difference]: Start difference. First operand 1148 states and 1565 transitions. Second operand 4 states. [2019-11-23 21:05:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:05:50,139 INFO L93 Difference]: Finished difference Result 4144 states and 5715 transitions. [2019-11-23 21:05:50,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:05:50,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2019-11-23 21:05:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:05:50,155 INFO L225 Difference]: With dead ends: 4144 [2019-11-23 21:05:50,155 INFO L226 Difference]: Without dead ends: 2998 [2019-11-23 21:05:50,158 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 21:05:50,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2019-11-23 21:05:50,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2998. [2019-11-23 21:05:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2998 states. [2019-11-23 21:05:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 3663 transitions. [2019-11-23 21:05:50,245 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 3663 transitions. Word has length 141 [2019-11-23 21:05:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:05:50,246 INFO L462 AbstractCegarLoop]: Abstraction has 2998 states and 3663 transitions. [2019-11-23 21:05:50,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:05:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 3663 transitions. [2019-11-23 21:05:50,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-11-23 21:05:50,254 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:05:50,254 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:05:50,254 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:05:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:05:50,256 INFO L82 PathProgramCache]: Analyzing trace with hash -381057166, now seen corresponding path program 1 times [2019-11-23 21:05:50,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:05:50,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59423358] [2019-11-23 21:05:50,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:05:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:05:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:05:50,522 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59423358] [2019-11-23 21:05:50,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:05:50,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:05:50,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943832348] [2019-11-23 21:05:50,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:05:50,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:05:50,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:05:50,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:05:50,525 INFO L87 Difference]: Start difference. First operand 2998 states and 3663 transitions. Second operand 4 states. [2019-11-23 21:05:52,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:05:52,123 INFO L93 Difference]: Finished difference Result 7485 states and 9308 transitions. [2019-11-23 21:05:52,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:05:52,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2019-11-23 21:05:52,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:05:52,145 INFO L225 Difference]: With dead ends: 7485 [2019-11-23 21:05:52,145 INFO L226 Difference]: Without dead ends: 4673 [2019-11-23 21:05:52,150 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 21:05:52,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4673 states. [2019-11-23 21:05:52,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4673 to 4470. [2019-11-23 21:05:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4470 states. [2019-11-23 21:05:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4470 states to 4470 states and 5440 transitions. [2019-11-23 21:05:52,242 INFO L78 Accepts]: Start accepts. Automaton has 4470 states and 5440 transitions. Word has length 236 [2019-11-23 21:05:52,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:05:52,243 INFO L462 AbstractCegarLoop]: Abstraction has 4470 states and 5440 transitions. [2019-11-23 21:05:52,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:05:52,244 INFO L276 IsEmpty]: Start isEmpty. Operand 4470 states and 5440 transitions. [2019-11-23 21:05:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-11-23 21:05:52,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:05:52,252 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:05:52,252 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:05:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:05:52,252 INFO L82 PathProgramCache]: Analyzing trace with hash -356634931, now seen corresponding path program 1 times [2019-11-23 21:05:52,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:05:52,254 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113479408] [2019-11-23 21:05:52,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:05:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:05:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-11-23 21:05:52,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113479408] [2019-11-23 21:05:52,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:05:52,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 21:05:52,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351769898] [2019-11-23 21:05:52,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:05:52,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:05:52,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:05:52,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:05:52,586 INFO L87 Difference]: Start difference. First operand 4470 states and 5440 transitions. Second operand 3 states. [2019-11-23 21:05:53,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:05:53,566 INFO L93 Difference]: Finished difference Result 10041 states and 12450 transitions. [2019-11-23 21:05:53,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:05:53,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 251 [2019-11-23 21:05:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:05:53,594 INFO L225 Difference]: With dead ends: 10041 [2019-11-23 21:05:53,594 INFO L226 Difference]: Without dead ends: 5757 [2019-11-23 21:05:53,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 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 21:05:53,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5757 states. [2019-11-23 21:05:53,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5757 to 5572. [2019-11-23 21:05:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5572 states. [2019-11-23 21:05:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5572 states to 5572 states and 6703 transitions. [2019-11-23 21:05:53,690 INFO L78 Accepts]: Start accepts. Automaton has 5572 states and 6703 transitions. Word has length 251 [2019-11-23 21:05:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:05:53,691 INFO L462 AbstractCegarLoop]: Abstraction has 5572 states and 6703 transitions. [2019-11-23 21:05:53,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:05:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 5572 states and 6703 transitions. [2019-11-23 21:05:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-11-23 21:05:53,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:05:53,697 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:05:53,698 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:05:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:05:53,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1030741549, now seen corresponding path program 1 times [2019-11-23 21:05:53,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:05:53,699 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001532268] [2019-11-23 21:05:53,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:05:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:05:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 66 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:05:54,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001532268] [2019-11-23 21:05:54,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978918521] [2019-11-23 21:05:54,359 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 21:05:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:05:54,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:05:54,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:05:54,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:05:54,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:05:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:05:55,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:05:55,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2019-11-23 21:05:55,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903985453] [2019-11-23 21:05:55,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:05:55,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:05:55,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:05:55,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:05:55,062 INFO L87 Difference]: Start difference. First operand 5572 states and 6703 transitions. Second operand 4 states. [2019-11-23 21:05:57,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:05:57,634 INFO L93 Difference]: Finished difference Result 15571 states and 18826 transitions. [2019-11-23 21:05:57,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:05:57,635 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 267 [2019-11-23 21:05:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:05:57,676 INFO L225 Difference]: With dead ends: 15571 [2019-11-23 21:05:57,676 INFO L226 Difference]: Without dead ends: 10185 [2019-11-23 21:05:57,684 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 265 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:05:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10185 states. [2019-11-23 21:05:57,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10185 to 9443. [2019-11-23 21:05:57,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9443 states. [2019-11-23 21:05:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9443 states to 9443 states and 11279 transitions. [2019-11-23 21:05:57,845 INFO L78 Accepts]: Start accepts. Automaton has 9443 states and 11279 transitions. Word has length 267 [2019-11-23 21:05:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:05:57,846 INFO L462 AbstractCegarLoop]: Abstraction has 9443 states and 11279 transitions. [2019-11-23 21:05:57,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:05:57,846 INFO L276 IsEmpty]: Start isEmpty. Operand 9443 states and 11279 transitions. [2019-11-23 21:05:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-11-23 21:05:57,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:05:57,854 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:05:58,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:05:58,067 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:05:58,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:05:58,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1546626242, now seen corresponding path program 1 times [2019-11-23 21:05:58,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:05:58,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135719526] [2019-11-23 21:05:58,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:05:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:05:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 147 proven. 4 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-23 21:05:58,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135719526] [2019-11-23 21:05:58,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568150232] [2019-11-23 21:05:58,336 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 21:05:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:05:58,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:05:58,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:05:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-11-23 21:05:58,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:05:58,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-23 21:05:58,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509025841] [2019-11-23 21:05:58,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:05:58,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:05:58,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:05:58,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:05:58,584 INFO L87 Difference]: Start difference. First operand 9443 states and 11279 transitions. Second operand 3 states. [2019-11-23 21:05:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:05:59,512 INFO L93 Difference]: Finished difference Result 18514 states and 22156 transitions. [2019-11-23 21:05:59,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:05:59,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 278 [2019-11-23 21:05:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:05:59,567 INFO L225 Difference]: With dead ends: 18514 [2019-11-23 21:05:59,568 INFO L226 Difference]: Without dead ends: 9257 [2019-11-23 21:05:59,583 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 279 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 21:05:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9257 states. [2019-11-23 21:05:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9257 to 9257. [2019-11-23 21:05:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9257 states. [2019-11-23 21:05:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9257 states to 9257 states and 10788 transitions. [2019-11-23 21:05:59,733 INFO L78 Accepts]: Start accepts. Automaton has 9257 states and 10788 transitions. Word has length 278 [2019-11-23 21:05:59,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:05:59,734 INFO L462 AbstractCegarLoop]: Abstraction has 9257 states and 10788 transitions. [2019-11-23 21:05:59,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:05:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 9257 states and 10788 transitions. [2019-11-23 21:05:59,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-11-23 21:05:59,741 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:05:59,742 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:05:59,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:05:59,947 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:05:59,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:05:59,948 INFO L82 PathProgramCache]: Analyzing trace with hash 627435673, now seen corresponding path program 1 times [2019-11-23 21:05:59,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:05:59,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486061248] [2019-11-23 21:05:59,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:06:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:06:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:06:00,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486061248] [2019-11-23 21:06:00,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:06:00,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:06:00,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829438307] [2019-11-23 21:06:00,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:06:00,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:06:00,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:06:00,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:06:00,311 INFO L87 Difference]: Start difference. First operand 9257 states and 10788 transitions. Second operand 4 states. [2019-11-23 21:06:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:06:01,585 INFO L93 Difference]: Finished difference Result 19084 states and 22277 transitions. [2019-11-23 21:06:01,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:06:01,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 281 [2019-11-23 21:06:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:06:01,602 INFO L225 Difference]: With dead ends: 19084 [2019-11-23 21:06:01,602 INFO L226 Difference]: Without dead ends: 10013 [2019-11-23 21:06:01,613 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 21:06:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10013 states. [2019-11-23 21:06:01,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10013 to 9627. [2019-11-23 21:06:01,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9627 states. [2019-11-23 21:06:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9627 states to 9627 states and 11195 transitions. [2019-11-23 21:06:01,745 INFO L78 Accepts]: Start accepts. Automaton has 9627 states and 11195 transitions. Word has length 281 [2019-11-23 21:06:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:06:01,745 INFO L462 AbstractCegarLoop]: Abstraction has 9627 states and 11195 transitions. [2019-11-23 21:06:01,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:06:01,746 INFO L276 IsEmpty]: Start isEmpty. Operand 9627 states and 11195 transitions. [2019-11-23 21:06:01,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2019-11-23 21:06:01,754 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:06:01,755 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-11-23 21:06:01,755 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:06:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:06:01,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1328057524, now seen corresponding path program 1 times [2019-11-23 21:06:01,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:06:01,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328503915] [2019-11-23 21:06:01,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:06:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:06:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 107 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:06:02,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328503915] [2019-11-23 21:06:02,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210225110] [2019-11-23 21:06:02,661 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 21:06:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:06:02,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:06:02,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:06:02,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:06:02,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:06:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-11-23 21:06:03,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:06:03,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 13 [2019-11-23 21:06:03,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999698631] [2019-11-23 21:06:03,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:06:03,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:06:03,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:06:03,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-11-23 21:06:03,060 INFO L87 Difference]: Start difference. First operand 9627 states and 11195 transitions. Second operand 3 states. [2019-11-23 21:06:39,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:06:39,421 INFO L93 Difference]: Finished difference Result 22027 states and 25765 transitions. [2019-11-23 21:06:39,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:06:39,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 305 [2019-11-23 21:06:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:06:39,449 INFO L225 Difference]: With dead ends: 22027 [2019-11-23 21:06:39,450 INFO L226 Difference]: Without dead ends: 12034 [2019-11-23 21:06:39,461 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-11-23 21:06:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12034 states. [2019-11-23 21:06:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12034 to 11847. [2019-11-23 21:06:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11847 states. [2019-11-23 21:06:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11847 states to 11847 states and 13785 transitions. [2019-11-23 21:06:39,618 INFO L78 Accepts]: Start accepts. Automaton has 11847 states and 13785 transitions. Word has length 305 [2019-11-23 21:06:39,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:06:39,619 INFO L462 AbstractCegarLoop]: Abstraction has 11847 states and 13785 transitions. [2019-11-23 21:06:39,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:06:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 11847 states and 13785 transitions. [2019-11-23 21:06:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2019-11-23 21:06:39,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:06:39,629 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:06:39,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:06:39,833 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:06:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:06:39,834 INFO L82 PathProgramCache]: Analyzing trace with hash 510288335, now seen corresponding path program 1 times [2019-11-23 21:06:39,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:06:39,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391950413] [2019-11-23 21:06:39,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:06:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:06:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-11-23 21:06:40,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391950413] [2019-11-23 21:06:40,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:06:40,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:06:40,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952725737] [2019-11-23 21:06:40,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:06:40,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:06:40,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:06:40,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:06:40,031 INFO L87 Difference]: Start difference. First operand 11847 states and 13785 transitions. Second operand 3 states. [2019-11-23 21:06:41,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:06:41,423 INFO L93 Difference]: Finished difference Result 25531 states and 29730 transitions. [2019-11-23 21:06:41,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:06:41,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 310 [2019-11-23 21:06:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:06:41,449 INFO L225 Difference]: With dead ends: 25531 [2019-11-23 21:06:41,449 INFO L226 Difference]: Without dead ends: 13134 [2019-11-23 21:06:41,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 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 21:06:41,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13134 states. [2019-11-23 21:06:41,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13134 to 10914. [2019-11-23 21:06:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10914 states. [2019-11-23 21:06:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10914 states to 10914 states and 12544 transitions. [2019-11-23 21:06:41,604 INFO L78 Accepts]: Start accepts. Automaton has 10914 states and 12544 transitions. Word has length 310 [2019-11-23 21:06:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:06:41,605 INFO L462 AbstractCegarLoop]: Abstraction has 10914 states and 12544 transitions. [2019-11-23 21:06:41,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:06:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 10914 states and 12544 transitions. [2019-11-23 21:06:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2019-11-23 21:06:41,617 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:06:41,618 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:06:41,618 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:06:41,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:06:41,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2040805826, now seen corresponding path program 1 times [2019-11-23 21:06:41,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:06:41,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385716251] [2019-11-23 21:06:41,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:06:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:06:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 311 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-11-23 21:06:41,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385716251] [2019-11-23 21:06:41,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:06:41,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:06:41,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877276722] [2019-11-23 21:06:41,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:06:41,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:06:41,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:06:41,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:06:41,910 INFO L87 Difference]: Start difference. First operand 10914 states and 12544 transitions. Second operand 3 states. [2019-11-23 21:06:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:06:42,817 INFO L93 Difference]: Finished difference Result 22200 states and 25551 transitions. [2019-11-23 21:06:42,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:06:42,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2019-11-23 21:06:42,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:06:42,833 INFO L225 Difference]: With dead ends: 22200 [2019-11-23 21:06:42,833 INFO L226 Difference]: Without dead ends: 11104 [2019-11-23 21:06:42,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 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 21:06:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11104 states. [2019-11-23 21:06:43,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11104 to 10182. [2019-11-23 21:06:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10182 states. [2019-11-23 21:06:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 11676 transitions. [2019-11-23 21:06:43,095 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 11676 transitions. Word has length 335 [2019-11-23 21:06:43,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:06:43,095 INFO L462 AbstractCegarLoop]: Abstraction has 10182 states and 11676 transitions. [2019-11-23 21:06:43,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:06:43,096 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 11676 transitions. [2019-11-23 21:06:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-11-23 21:06:43,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:06:43,108 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:06:43,108 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:06:43,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:06:43,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1721381139, now seen corresponding path program 1 times [2019-11-23 21:06:43,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:06:43,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897830329] [2019-11-23 21:06:43,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:06:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:06:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-23 21:06:43,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897830329] [2019-11-23 21:06:43,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:06:43,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:06:43,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233457139] [2019-11-23 21:06:43,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:06:43,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:06:43,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:06:43,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:06:43,358 INFO L87 Difference]: Start difference. First operand 10182 states and 11676 transitions. Second operand 4 states. [2019-11-23 21:06:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:06:45,194 INFO L93 Difference]: Finished difference Result 20750 states and 23777 transitions. [2019-11-23 21:06:45,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:06:45,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2019-11-23 21:06:45,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:06:45,211 INFO L225 Difference]: With dead ends: 20750 [2019-11-23 21:06:45,212 INFO L226 Difference]: Without dead ends: 10754 [2019-11-23 21:06:45,228 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 21:06:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10754 states. [2019-11-23 21:06:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10754 to 10182. [2019-11-23 21:06:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10182 states. [2019-11-23 21:06:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 11490 transitions. [2019-11-23 21:06:45,393 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 11490 transitions. Word has length 336 [2019-11-23 21:06:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:06:45,394 INFO L462 AbstractCegarLoop]: Abstraction has 10182 states and 11490 transitions. [2019-11-23 21:06:45,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:06:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 11490 transitions. [2019-11-23 21:06:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2019-11-23 21:06:45,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:06:45,409 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-11-23 21:06:45,409 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:06:45,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:06:45,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1682522593, now seen corresponding path program 1 times [2019-11-23 21:06:45,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:06:45,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81469794] [2019-11-23 21:06:45,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:06:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:06:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 46 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:06:46,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81469794] [2019-11-23 21:06:46,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617323979] [2019-11-23 21:06:46,158 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 21:06:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:06:46,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:06:46,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:06:46,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:06:46,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:06:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 391 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-11-23 21:06:46,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:06:46,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2019-11-23 21:06:46,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324616173] [2019-11-23 21:06:46,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:06:46,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:06:46,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:06:46,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:06:46,678 INFO L87 Difference]: Start difference. First operand 10182 states and 11490 transitions. Second operand 4 states. [2019-11-23 21:06:48,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:06:48,976 INFO L93 Difference]: Finished difference Result 22762 states and 25749 transitions. [2019-11-23 21:06:48,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:06:48,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 379 [2019-11-23 21:06:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:06:48,989 INFO L225 Difference]: With dead ends: 22762 [2019-11-23 21:06:48,989 INFO L226 Difference]: Without dead ends: 12766 [2019-11-23 21:06:48,995 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:06:49,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12766 states. [2019-11-23 21:06:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12766 to 12024. [2019-11-23 21:06:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12024 states. [2019-11-23 21:06:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12024 states to 12024 states and 13467 transitions. [2019-11-23 21:06:49,140 INFO L78 Accepts]: Start accepts. Automaton has 12024 states and 13467 transitions. Word has length 379 [2019-11-23 21:06:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:06:49,141 INFO L462 AbstractCegarLoop]: Abstraction has 12024 states and 13467 transitions. [2019-11-23 21:06:49,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:06:49,141 INFO L276 IsEmpty]: Start isEmpty. Operand 12024 states and 13467 transitions. [2019-11-23 21:06:49,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2019-11-23 21:06:49,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:06:49,153 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-11-23 21:06:49,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:06:49,358 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:06:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:06:49,358 INFO L82 PathProgramCache]: Analyzing trace with hash 732027564, now seen corresponding path program 1 times [2019-11-23 21:06:49,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:06:49,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365212282] [2019-11-23 21:06:49,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:06:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:06:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-23 21:06:49,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365212282] [2019-11-23 21:06:49,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:06:49,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:06:49,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119934771] [2019-11-23 21:06:49,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:06:49,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:06:49,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:06:49,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:06:49,660 INFO L87 Difference]: Start difference. First operand 12024 states and 13467 transitions. Second operand 4 states. [2019-11-23 21:06:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:06:51,383 INFO L93 Difference]: Finished difference Result 24059 states and 26951 transitions. [2019-11-23 21:06:51,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:06:51,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 379 [2019-11-23 21:06:51,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:06:51,396 INFO L225 Difference]: With dead ends: 24059 [2019-11-23 21:06:51,396 INFO L226 Difference]: Without dead ends: 12221 [2019-11-23 21:06:51,404 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 21:06:51,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12221 states. [2019-11-23 21:06:51,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12221 to 12024. [2019-11-23 21:06:51,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12024 states. [2019-11-23 21:06:51,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12024 states to 12024 states and 13243 transitions. [2019-11-23 21:06:51,544 INFO L78 Accepts]: Start accepts. Automaton has 12024 states and 13243 transitions. Word has length 379 [2019-11-23 21:06:51,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:06:51,544 INFO L462 AbstractCegarLoop]: Abstraction has 12024 states and 13243 transitions. [2019-11-23 21:06:51,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:06:51,544 INFO L276 IsEmpty]: Start isEmpty. Operand 12024 states and 13243 transitions. [2019-11-23 21:06:51,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2019-11-23 21:06:51,553 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:06:51,554 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 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 21:06:51,554 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:06:51,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:06:51,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1821887244, now seen corresponding path program 1 times [2019-11-23 21:06:51,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:06:51,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712965259] [2019-11-23 21:06:51,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:06:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:06:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 443 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:06:51,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712965259] [2019-11-23 21:06:51,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711122252] [2019-11-23 21:06:51,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:06:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:06:52,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:06:52,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:06:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-23 21:06:52,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:06:52,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-23 21:06:52,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692577691] [2019-11-23 21:06:52,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:06:52,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:06:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:06:52,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:06:52,361 INFO L87 Difference]: Start difference. First operand 12024 states and 13243 transitions. Second operand 3 states. [2019-11-23 21:06:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:06:53,465 INFO L93 Difference]: Finished difference Result 24052 states and 26514 transitions. [2019-11-23 21:06:53,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:06:53,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 384 [2019-11-23 21:06:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:06:53,479 INFO L225 Difference]: With dead ends: 24052 [2019-11-23 21:06:53,479 INFO L226 Difference]: Without dead ends: 12214 [2019-11-23 21:06:53,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:06:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12214 states. [2019-11-23 21:06:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12214 to 12210. [2019-11-23 21:06:53,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12210 states. [2019-11-23 21:06:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12210 states to 12210 states and 13440 transitions. [2019-11-23 21:06:53,660 INFO L78 Accepts]: Start accepts. Automaton has 12210 states and 13440 transitions. Word has length 384 [2019-11-23 21:06:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:06:53,661 INFO L462 AbstractCegarLoop]: Abstraction has 12210 states and 13440 transitions. [2019-11-23 21:06:53,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:06:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 12210 states and 13440 transitions. [2019-11-23 21:06:53,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2019-11-23 21:06:53,672 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:06:53,673 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-11-23 21:06:53,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:06:53,885 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:06:53,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:06:53,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1802628130, now seen corresponding path program 1 times [2019-11-23 21:06:53,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:06:53,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135366765] [2019-11-23 21:06:53,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:06:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:06:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 42 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:06:55,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135366765] [2019-11-23 21:06:55,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274936099] [2019-11-23 21:06:55,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:06:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:06:55,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 21:06:55,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:06:55,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:06:55,483 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:06:55,483 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:06:55,484 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:06:55,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:06:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 242 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:06:56,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:06:56,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 16 [2019-11-23 21:06:56,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356642439] [2019-11-23 21:06:56,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 21:06:56,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:06:56,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 21:06:56,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-11-23 21:06:56,125 INFO L87 Difference]: Start difference. First operand 12210 states and 13440 transitions. Second operand 17 states.