/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/Problem15_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:14:35,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:14:35,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:14:35,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 21:14:35,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 21:14:35,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 21:14:35,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 21:14:35,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 21:14:35,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 21:14:35,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 21:14:35,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 21:14:35,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 21:14:35,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:14:35,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:14:35,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:14:35,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:14:35,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:14:35,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:14:35,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:14:35,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:14:35,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:14:35,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:14:35,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:14:35,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:14:35,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 21:14:35,980 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 21:14:36,000 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:14:36,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:14:36,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:14:36,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:14:36,002 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:14:36,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:14:36,002 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:14:36,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:14:36,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:14:36,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:14:36,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:14:36,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:14:36,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:14:36,005 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:14:36,005 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:14:36,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:14:36,005 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:14:36,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:14:36,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:14:36,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:14:36,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:14:36,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:14:36,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:14:36,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:14:36,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:14:36,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:14:36,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:14:36,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:14:36,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:14:36,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:14:36,327 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:14:36,345 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:14:36,349 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:14:36,350 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:14:36,351 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:14:36,352 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label31.c [2019-11-23 21:14:36,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eb784f89/e50269f5e6394be39a11e7efa66f50ba/FLAGd99f05d2b [2019-11-23 21:14:37,071 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:14:37,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label31.c [2019-11-23 21:14:37,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eb784f89/e50269f5e6394be39a11e7efa66f50ba/FLAGd99f05d2b [2019-11-23 21:14:37,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eb784f89/e50269f5e6394be39a11e7efa66f50ba [2019-11-23 21:14:37,219 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:14:37,221 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:14:37,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:14:37,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:14:37,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:14:37,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:14:37" (1/1) ... [2019-11-23 21:14:37,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42d63343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:37, skipping insertion in model container [2019-11-23 21:14:37,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:14:37" (1/1) ... [2019-11-23 21:14:37,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:14:37,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:14:38,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:14:38,197 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:14:38,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:14:38,486 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:14:38,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:38 WrapperNode [2019-11-23 21:14:38,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:14:38,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:14:38,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:14:38,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:14:38,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:38" (1/1) ... [2019-11-23 21:14:38,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:38" (1/1) ... [2019-11-23 21:14:38,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:14:38,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:14:38,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:14:38,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:14:38,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:38" (1/1) ... [2019-11-23 21:14:38,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:38" (1/1) ... [2019-11-23 21:14:38,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:38" (1/1) ... [2019-11-23 21:14:38,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:38" (1/1) ... [2019-11-23 21:14:38,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:38" (1/1) ... [2019-11-23 21:14:38,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:38" (1/1) ... [2019-11-23 21:14:38,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:38" (1/1) ... [2019-11-23 21:14:38,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:14:38,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:14:38,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:14:38,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:14:38,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:38" (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 21:14:38,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:14:38,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:14:41,868 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:14:41,868 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 21:14:41,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:14:41 BoogieIcfgContainer [2019-11-23 21:14:41,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:14:41,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:14:41,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:14:41,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:14:41,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:14:37" (1/3) ... [2019-11-23 21:14:41,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe59613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:14:41, skipping insertion in model container [2019-11-23 21:14:41,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:38" (2/3) ... [2019-11-23 21:14:41,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe59613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:14:41, skipping insertion in model container [2019-11-23 21:14:41,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:14:41" (3/3) ... [2019-11-23 21:14:41,880 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label31.c [2019-11-23 21:14:41,895 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:14:41,906 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:14:41,923 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:14:41,959 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:14:41,960 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:14:41,960 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:14:41,960 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:14:41,960 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:14:41,960 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:14:41,961 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:14:41,961 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:14:41,991 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states. [2019-11-23 21:14:42,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 21:14:42,003 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:42,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:42,005 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:42,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:42,015 INFO L82 PathProgramCache]: Analyzing trace with hash 962891993, now seen corresponding path program 1 times [2019-11-23 21:14:42,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:42,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038131633] [2019-11-23 21:14:42,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:42,393 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 21:14:42,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038131633] [2019-11-23 21:14:42,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:42,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:14:42,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426165108] [2019-11-23 21:14:42,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:14:42,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:42,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:14:42,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:14:42,421 INFO L87 Difference]: Start difference. First operand 424 states. Second operand 4 states. [2019-11-23 21:14:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:48,477 INFO L93 Difference]: Finished difference Result 1466 states and 2715 transitions. [2019-11-23 21:14:48,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:14:48,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2019-11-23 21:14:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:48,504 INFO L225 Difference]: With dead ends: 1466 [2019-11-23 21:14:48,504 INFO L226 Difference]: Without dead ends: 974 [2019-11-23 21:14:48,511 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 21:14:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2019-11-23 21:14:48,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 972. [2019-11-23 21:14:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 972 states. [2019-11-23 21:14:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1407 transitions. [2019-11-23 21:14:48,656 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1407 transitions. Word has length 65 [2019-11-23 21:14:48,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:48,657 INFO L462 AbstractCegarLoop]: Abstraction has 972 states and 1407 transitions. [2019-11-23 21:14:48,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:14:48,657 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1407 transitions. [2019-11-23 21:14:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-23 21:14:48,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:48,669 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, 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] [2019-11-23 21:14:48,669 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash -597315905, now seen corresponding path program 1 times [2019-11-23 21:14:48,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:48,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740639172] [2019-11-23 21:14:48,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:14:49,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740639172] [2019-11-23 21:14:49,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:49,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:14:49,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109477692] [2019-11-23 21:14:49,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:14:49,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:49,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:14:49,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:14:49,015 INFO L87 Difference]: Start difference. First operand 972 states and 1407 transitions. Second operand 5 states. [2019-11-23 21:14:55,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:55,203 INFO L93 Difference]: Finished difference Result 3160 states and 4506 transitions. [2019-11-23 21:14:55,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:14:55,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-11-23 21:14:55,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:55,221 INFO L225 Difference]: With dead ends: 3160 [2019-11-23 21:14:55,223 INFO L226 Difference]: Without dead ends: 2190 [2019-11-23 21:14:55,234 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:14:55,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2019-11-23 21:14:55,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1883. [2019-11-23 21:14:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1883 states. [2019-11-23 21:14:55,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 2528 transitions. [2019-11-23 21:14:55,332 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 2528 transitions. Word has length 130 [2019-11-23 21:14:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:55,336 INFO L462 AbstractCegarLoop]: Abstraction has 1883 states and 2528 transitions. [2019-11-23 21:14:55,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:14:55,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 2528 transitions. [2019-11-23 21:14:55,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 21:14:55,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:55,353 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, 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 21:14:55,353 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:55,355 INFO L82 PathProgramCache]: Analyzing trace with hash 292340142, now seen corresponding path program 1 times [2019-11-23 21:14:55,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:55,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947102436] [2019-11-23 21:14:55,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:14:55,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947102436] [2019-11-23 21:14:55,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:55,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:14:55,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249824589] [2019-11-23 21:14:55,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:14:55,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:55,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:14:55,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:14:55,597 INFO L87 Difference]: Start difference. First operand 1883 states and 2528 transitions. Second operand 4 states. [2019-11-23 21:15:00,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:00,202 INFO L93 Difference]: Finished difference Result 7063 states and 9566 transitions. [2019-11-23 21:15:00,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:15:00,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2019-11-23 21:15:00,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:00,228 INFO L225 Difference]: With dead ends: 7063 [2019-11-23 21:15:00,228 INFO L226 Difference]: Without dead ends: 5182 [2019-11-23 21:15:00,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:15:00,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5182 states. [2019-11-23 21:15:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5182 to 4877. [2019-11-23 21:15:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4877 states. [2019-11-23 21:15:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4877 states to 4877 states and 6146 transitions. [2019-11-23 21:15:00,332 INFO L78 Accepts]: Start accepts. Automaton has 4877 states and 6146 transitions. Word has length 135 [2019-11-23 21:15:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:00,334 INFO L462 AbstractCegarLoop]: Abstraction has 4877 states and 6146 transitions. [2019-11-23 21:15:00,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:15:00,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4877 states and 6146 transitions. [2019-11-23 21:15:00,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-11-23 21:15:00,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:00,345 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:15:00,346 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:00,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:00,346 INFO L82 PathProgramCache]: Analyzing trace with hash 558702324, now seen corresponding path program 1 times [2019-11-23 21:15:00,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:00,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000008522] [2019-11-23 21:15:00,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 125 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 21:15:00,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000008522] [2019-11-23 21:15:00,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553999937] [2019-11-23 21:15:00,598 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 21:15:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:00,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:15:00,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:15:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:15:00,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:15:00,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-11-23 21:15:00,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872190844] [2019-11-23 21:15:00,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:15:00,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:00,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:15:00,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:15:00,785 INFO L87 Difference]: Start difference. First operand 4877 states and 6146 transitions. Second operand 3 states. [2019-11-23 21:15:02,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:02,953 INFO L93 Difference]: Finished difference Result 13042 states and 16554 transitions. [2019-11-23 21:15:02,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:15:02,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2019-11-23 21:15:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:02,989 INFO L225 Difference]: With dead ends: 13042 [2019-11-23 21:15:02,989 INFO L226 Difference]: Without dead ends: 8167 [2019-11-23 21:15:02,995 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 235 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 21:15:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8167 states. [2019-11-23 21:15:03,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8167 to 5474. [2019-11-23 21:15:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5474 states. [2019-11-23 21:15:03,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 6846 transitions. [2019-11-23 21:15:03,114 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 6846 transitions. Word has length 235 [2019-11-23 21:15:03,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:03,115 INFO L462 AbstractCegarLoop]: Abstraction has 5474 states and 6846 transitions. [2019-11-23 21:15:03,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:15:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 6846 transitions. [2019-11-23 21:15:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2019-11-23 21:15:03,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:03,122 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:03,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:03,328 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:03,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:03,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1551389644, now seen corresponding path program 1 times [2019-11-23 21:15:03,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:03,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991484313] [2019-11-23 21:15:03,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 21:15:04,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991484313] [2019-11-23 21:15:04,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:15:04,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:15:04,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323669327] [2019-11-23 21:15:04,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:15:04,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:04,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:15:04,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:15:04,023 INFO L87 Difference]: Start difference. First operand 5474 states and 6846 transitions. Second operand 5 states. [2019-11-23 21:15:07,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:07,942 INFO L93 Difference]: Finished difference Result 11846 states and 14670 transitions. [2019-11-23 21:15:07,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:15:07,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2019-11-23 21:15:07,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:07,967 INFO L225 Difference]: With dead ends: 11846 [2019-11-23 21:15:07,968 INFO L226 Difference]: Without dead ends: 6374 [2019-11-23 21:15:07,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:15:07,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6374 states. [2019-11-23 21:15:08,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6374 to 6072. [2019-11-23 21:15:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6072 states. [2019-11-23 21:15:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6072 states to 6072 states and 7468 transitions. [2019-11-23 21:15:08,070 INFO L78 Accepts]: Start accepts. Automaton has 6072 states and 7468 transitions. Word has length 337 [2019-11-23 21:15:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:08,070 INFO L462 AbstractCegarLoop]: Abstraction has 6072 states and 7468 transitions. [2019-11-23 21:15:08,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:15:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 6072 states and 7468 transitions. [2019-11-23 21:15:08,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2019-11-23 21:15:08,078 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:08,079 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:08,079 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:08,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:08,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2046866950, now seen corresponding path program 1 times [2019-11-23 21:15:08,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:08,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987980393] [2019-11-23 21:15:08,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 123 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:15:09,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987980393] [2019-11-23 21:15:09,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794850849] [2019-11-23 21:15:09,165 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 21:15:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:09,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:15:09,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:15:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:15:09,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:15:09,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2019-11-23 21:15:09,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593979040] [2019-11-23 21:15:09,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:15:09,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:09,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:15:09,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-11-23 21:15:09,450 INFO L87 Difference]: Start difference. First operand 6072 states and 7468 transitions. Second operand 3 states. [2019-11-23 21:15:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:11,912 INFO L93 Difference]: Finished difference Result 14236 states and 17584 transitions. [2019-11-23 21:15:11,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:15:11,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 411 [2019-11-23 21:15:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:11,961 INFO L225 Difference]: With dead ends: 14236 [2019-11-23 21:15:11,961 INFO L226 Difference]: Without dead ends: 8166 [2019-11-23 21:15:11,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 411 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-11-23 21:15:11,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8166 states. [2019-11-23 21:15:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8166 to 7566. [2019-11-23 21:15:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7566 states. [2019-11-23 21:15:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7566 states to 7566 states and 9207 transitions. [2019-11-23 21:15:12,082 INFO L78 Accepts]: Start accepts. Automaton has 7566 states and 9207 transitions. Word has length 411 [2019-11-23 21:15:12,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:12,083 INFO L462 AbstractCegarLoop]: Abstraction has 7566 states and 9207 transitions. [2019-11-23 21:15:12,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:15:12,083 INFO L276 IsEmpty]: Start isEmpty. Operand 7566 states and 9207 transitions. [2019-11-23 21:15:12,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2019-11-23 21:15:12,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:12,091 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:15:12,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:12,298 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1315766337, now seen corresponding path program 1 times [2019-11-23 21:15:12,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:12,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582385876] [2019-11-23 21:15:12,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 363 proven. 3 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 21:15:13,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582385876] [2019-11-23 21:15:13,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84893989] [2019-11-23 21:15:13,355 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 21:15:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:13,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:15:13,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:15:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-23 21:15:13,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:15:13,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2019-11-23 21:15:13,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311977498] [2019-11-23 21:15:13,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:15:13,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:13,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:15:13,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:15:13,690 INFO L87 Difference]: Start difference. First operand 7566 states and 9207 transitions. Second operand 3 states. [2019-11-23 21:15:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:16,613 INFO L93 Difference]: Finished difference Result 15129 states and 18411 transitions. [2019-11-23 21:15:16,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:15:16,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 428 [2019-11-23 21:15:16,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:16,627 INFO L225 Difference]: With dead ends: 15129 [2019-11-23 21:15:16,628 INFO L226 Difference]: Without dead ends: 7565 [2019-11-23 21:15:16,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 427 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:15:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7565 states. [2019-11-23 21:15:16,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7565 to 7266. [2019-11-23 21:15:16,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7266 states. [2019-11-23 21:15:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7266 states to 7266 states and 8610 transitions. [2019-11-23 21:15:16,724 INFO L78 Accepts]: Start accepts. Automaton has 7266 states and 8610 transitions. Word has length 428 [2019-11-23 21:15:16,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:16,725 INFO L462 AbstractCegarLoop]: Abstraction has 7266 states and 8610 transitions. [2019-11-23 21:15:16,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:15:16,725 INFO L276 IsEmpty]: Start isEmpty. Operand 7266 states and 8610 transitions. [2019-11-23 21:15:16,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2019-11-23 21:15:16,737 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:16,737 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:15:16,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:16,942 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:16,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:16,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1977592393, now seen corresponding path program 1 times [2019-11-23 21:15:16,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:16,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165012073] [2019-11-23 21:15:16,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 276 proven. 134 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-23 21:15:17,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165012073] [2019-11-23 21:15:17,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973411907] [2019-11-23 21:15:17,723 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 21:15:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:17,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:15:17,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:15:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-11-23 21:15:18,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:15:18,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-23 21:15:18,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091371196] [2019-11-23 21:15:18,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:15:18,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:18,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:15:18,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:15:18,033 INFO L87 Difference]: Start difference. First operand 7266 states and 8610 transitions. Second operand 3 states. [2019-11-23 21:15:20,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:20,031 INFO L93 Difference]: Finished difference Result 14531 states and 17221 transitions. [2019-11-23 21:15:20,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:15:20,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 520 [2019-11-23 21:15:20,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:20,045 INFO L225 Difference]: With dead ends: 14531 [2019-11-23 21:15:20,045 INFO L226 Difference]: Without dead ends: 7267 [2019-11-23 21:15:20,052 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 521 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:15:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7267 states. [2019-11-23 21:15:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7267 to 7266. [2019-11-23 21:15:20,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7266 states. [2019-11-23 21:15:20,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7266 states to 7266 states and 8141 transitions. [2019-11-23 21:15:20,127 INFO L78 Accepts]: Start accepts. Automaton has 7266 states and 8141 transitions. Word has length 520 [2019-11-23 21:15:20,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:20,128 INFO L462 AbstractCegarLoop]: Abstraction has 7266 states and 8141 transitions. [2019-11-23 21:15:20,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:15:20,128 INFO L276 IsEmpty]: Start isEmpty. Operand 7266 states and 8141 transitions. [2019-11-23 21:15:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2019-11-23 21:15:20,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:20,142 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:20,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:20,346 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:20,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1474694364, now seen corresponding path program 1 times [2019-11-23 21:15:20,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:20,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162192449] [2019-11-23 21:15:20,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 579 proven. 3 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2019-11-23 21:15:21,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162192449] [2019-11-23 21:15:21,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240866149] [2019-11-23 21:15:21,264 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 21:15:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:21,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:15:21,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:15:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2019-11-23 21:15:21,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:15:21,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2019-11-23 21:15:21,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097394294] [2019-11-23 21:15:21,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:15:21,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:21,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:15:21,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:15:21,684 INFO L87 Difference]: Start difference. First operand 7266 states and 8141 transitions. Second operand 3 states. [2019-11-23 21:15:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:23,723 INFO L93 Difference]: Finished difference Result 16624 states and 18688 transitions. [2019-11-23 21:15:23,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:15:23,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 553 [2019-11-23 21:15:23,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:23,746 INFO L225 Difference]: With dead ends: 16624 [2019-11-23 21:15:23,746 INFO L226 Difference]: Without dead ends: 9360 [2019-11-23 21:15:23,754 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 552 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:15:23,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2019-11-23 21:15:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 9061. [2019-11-23 21:15:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9061 states. [2019-11-23 21:15:23,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9061 states to 9061 states and 10079 transitions. [2019-11-23 21:15:23,851 INFO L78 Accepts]: Start accepts. Automaton has 9061 states and 10079 transitions. Word has length 553 [2019-11-23 21:15:23,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:23,852 INFO L462 AbstractCegarLoop]: Abstraction has 9061 states and 10079 transitions. [2019-11-23 21:15:23,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:15:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 9061 states and 10079 transitions. [2019-11-23 21:15:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2019-11-23 21:15:23,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:23,865 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:24,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:24,069 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:24,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:24,070 INFO L82 PathProgramCache]: Analyzing trace with hash 853699833, now seen corresponding path program 1 times [2019-11-23 21:15:24,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:24,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734088335] [2019-11-23 21:15:24,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 617 proven. 3 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-11-23 21:15:25,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734088335] [2019-11-23 21:15:25,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079023580] [2019-11-23 21:15:25,220 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 21:15:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:25,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 21:15:25,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:15:25,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:15:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 581 proven. 39 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-11-23 21:15:26,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:15:26,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 21:15:26,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578899298] [2019-11-23 21:15:26,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 21:15:26,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:26,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 21:15:26,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:15:26,180 INFO L87 Difference]: Start difference. First operand 9061 states and 10079 transitions. Second operand 9 states. [2019-11-23 21:15:36,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:15:36,001 INFO L93 Difference]: Finished difference Result 22760 states and 25199 transitions. [2019-11-23 21:15:36,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 21:15:36,002 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 592 [2019-11-23 21:15:36,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:15:36,017 INFO L225 Difference]: With dead ends: 22760 [2019-11-23 21:15:36,017 INFO L226 Difference]: Without dead ends: 9957 [2019-11-23 21:15:36,028 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 590 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-11-23 21:15:36,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9957 states. [2019-11-23 21:15:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9957 to 9657. [2019-11-23 21:15:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9657 states. [2019-11-23 21:15:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9657 states to 9657 states and 10099 transitions. [2019-11-23 21:15:36,148 INFO L78 Accepts]: Start accepts. Automaton has 9657 states and 10099 transitions. Word has length 592 [2019-11-23 21:15:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:15:36,149 INFO L462 AbstractCegarLoop]: Abstraction has 9657 states and 10099 transitions. [2019-11-23 21:15:36,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 21:15:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 9657 states and 10099 transitions. [2019-11-23 21:15:36,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2019-11-23 21:15:36,156 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:15:36,157 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:15:36,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:36,364 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:15:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:15:36,365 INFO L82 PathProgramCache]: Analyzing trace with hash -46682771, now seen corresponding path program 1 times [2019-11-23 21:15:36,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:15:36,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793309378] [2019-11-23 21:15:36,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:15:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:15:38,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793309378] [2019-11-23 21:15:38,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201862079] [2019-11-23 21:15:38,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:15:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:15:38,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 21:15:38,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:15:39,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:15:39,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:39,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:39,046 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:39,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:39,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:39,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:15:39,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-23 21:15:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 287 proven. 52 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-23 21:15:39,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:15:39,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 19 [2019-11-23 21:15:39,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525304228] [2019-11-23 21:15:39,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 21:15:39,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:15:39,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 21:15:39,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2019-11-23 21:15:39,500 INFO L87 Difference]: Start difference. First operand 9657 states and 10099 transitions. Second operand 19 states.