/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/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 03:32:24,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 03:32:24,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 03:32:24,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 03:32:24,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 03:32:24,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 03:32:24,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 03:32:24,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 03:32:24,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 03:32:24,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 03:32:24,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 03:32:24,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 03:32:24,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 03:32:24,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 03:32:24,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 03:32:24,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 03:32:24,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 03:32:24,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 03:32:24,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 03:32:24,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 03:32:24,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 03:32:24,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 03:32:24,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 03:32:24,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 03:32:24,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 03:32:24,657 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 03:32:24,657 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 03:32:24,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 03:32:24,659 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 03:32:24,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 03:32:24,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 03:32:24,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 03:32:24,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 03:32:24,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 03:32:24,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 03:32:24,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 03:32:24,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 03:32:24,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 03:32:24,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 03:32:24,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 03:32:24,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 03:32:24,672 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 03:32:24,727 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 03:32:24,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 03:32:24,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 03:32:24,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 03:32:24,729 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 03:32:24,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 03:32:24,729 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 03:32:24,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 03:32:24,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 03:32:24,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 03:32:24,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 03:32:24,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 03:32:24,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 03:32:24,733 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 03:32:24,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 03:32:24,733 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 03:32:24,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 03:32:24,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 03:32:24,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 03:32:24,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 03:32:24,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 03:32:24,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:32:24,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 03:32:24,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 03:32:24,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 03:32:24,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 03:32:24,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 03:32:24,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 03:32:24,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 03:32:24,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; [2020-08-19 03:32:25,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 03:32:25,038 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 03:32:25,042 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 03:32:25,043 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 03:32:25,044 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 03:32:25,044 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-08-19 03:32:25,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad7f3b46e/9a366fa29e78415296114e23dea87fad/FLAGf777de2f1 [2020-08-19 03:32:25,542 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 03:32:25,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-08-19 03:32:25,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad7f3b46e/9a366fa29e78415296114e23dea87fad/FLAGf777de2f1 [2020-08-19 03:32:25,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad7f3b46e/9a366fa29e78415296114e23dea87fad [2020-08-19 03:32:25,879 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 03:32:25,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 03:32:25,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 03:32:25,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 03:32:25,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 03:32:25,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:32:25" (1/1) ... [2020-08-19 03:32:25,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3afd2ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:25, skipping insertion in model container [2020-08-19 03:32:25,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:32:25" (1/1) ... [2020-08-19 03:32:25,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 03:32:25,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 03:32:26,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:32:26,095 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 03:32:26,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:32:26,130 INFO L208 MainTranslator]: Completed translation [2020-08-19 03:32:26,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:26 WrapperNode [2020-08-19 03:32:26,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 03:32:26,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 03:32:26,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 03:32:26,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 03:32:26,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:26" (1/1) ... [2020-08-19 03:32:26,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:26" (1/1) ... [2020-08-19 03:32:26,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:26" (1/1) ... [2020-08-19 03:32:26,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:26" (1/1) ... [2020-08-19 03:32:26,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:26" (1/1) ... [2020-08-19 03:32:26,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:26" (1/1) ... [2020-08-19 03:32:26,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:26" (1/1) ... [2020-08-19 03:32:26,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 03:32:26,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 03:32:26,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 03:32:26,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 03:32:26,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-19 03:32:26,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 03:32:26,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 03:32:26,311 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-08-19 03:32:26,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 03:32:26,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 03:32:26,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 03:32:26,312 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-08-19 03:32:26,312 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 03:32:26,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 03:32:26,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 03:32:26,586 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 03:32:26,586 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 03:32:26,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:32:26 BoogieIcfgContainer [2020-08-19 03:32:26,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 03:32:26,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 03:32:26,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 03:32:26,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 03:32:26,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 03:32:25" (1/3) ... [2020-08-19 03:32:26,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee3f558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:32:26, skipping insertion in model container [2020-08-19 03:32:26,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:32:26" (2/3) ... [2020-08-19 03:32:26,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee3f558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:32:26, skipping insertion in model container [2020-08-19 03:32:26,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:32:26" (3/3) ... [2020-08-19 03:32:26,601 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-08-19 03:32:26,615 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 03:32:26,623 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 03:32:26,638 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 03:32:26,670 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 03:32:26,670 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 03:32:26,671 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 03:32:26,671 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 03:32:26,671 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 03:32:26,671 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 03:32:26,671 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 03:32:26,671 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 03:32:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-19 03:32:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 03:32:26,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:26,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:26,705 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:26,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:26,712 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-08-19 03:32:26,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:26,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778746352] [2020-08-19 03:32:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:26,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:26,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:26,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-19 03:32:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:32:26,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778746352] [2020-08-19 03:32:26,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:26,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 03:32:26,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571476789] [2020-08-19 03:32:26,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 03:32:26,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:26,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 03:32:26,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:32:26,998 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-08-19 03:32:27,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:27,134 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-08-19 03:32:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:32:27,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-08-19 03:32:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:27,147 INFO L225 Difference]: With dead ends: 41 [2020-08-19 03:32:27,148 INFO L226 Difference]: Without dead ends: 25 [2020-08-19 03:32:27,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 03:32:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-19 03:32:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-19 03:32:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-19 03:32:27,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-08-19 03:32:27,196 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-08-19 03:32:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:27,197 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-08-19 03:32:27,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 03:32:27,198 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-08-19 03:32:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 03:32:27,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:27,201 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:27,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 03:32:27,201 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:27,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:27,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-08-19 03:32:27,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:27,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690914383] [2020-08-19 03:32:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:27,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:27,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:27,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:27,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:32:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 03:32:27,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690914383] [2020-08-19 03:32:27,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:32:27,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 03:32:27,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874377898] [2020-08-19 03:32:27,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 03:32:27,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:27,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 03:32:27,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:32:27,335 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-08-19 03:32:27,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:27,416 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-08-19 03:32:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:32:27,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-19 03:32:27,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:27,418 INFO L225 Difference]: With dead ends: 29 [2020-08-19 03:32:27,418 INFO L226 Difference]: Without dead ends: 25 [2020-08-19 03:32:27,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 03:32:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-19 03:32:27,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-19 03:32:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-19 03:32:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-08-19 03:32:27,428 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-08-19 03:32:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:27,428 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-08-19 03:32:27,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 03:32:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-08-19 03:32:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 03:32:27,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:27,431 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:27,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 03:32:27,431 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:27,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:27,432 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-08-19 03:32:27,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:27,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458985266] [2020-08-19 03:32:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:27,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:27,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:27,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:27,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:32:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:27,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-19 03:32:27,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458985266] [2020-08-19 03:32:27,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:27,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 03:32:27,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932047463] [2020-08-19 03:32:27,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 03:32:27,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:27,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 03:32:27,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-08-19 03:32:27,902 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 15 states. [2020-08-19 03:32:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:28,320 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-08-19 03:32:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 03:32:28,320 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-08-19 03:32:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:28,322 INFO L225 Difference]: With dead ends: 43 [2020-08-19 03:32:28,323 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 03:32:28,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-08-19 03:32:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 03:32:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-08-19 03:32:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-19 03:32:28,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-08-19 03:32:28,340 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-08-19 03:32:28,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:28,340 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-08-19 03:32:28,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 03:32:28,341 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-08-19 03:32:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 03:32:28,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:28,345 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:28,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 03:32:28,347 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:28,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-08-19 03:32:28,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:28,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586230212] [2020-08-19 03:32:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:28,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:28,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:28,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:28,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:32:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:28,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:28,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 03:32:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-19 03:32:28,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586230212] [2020-08-19 03:32:28,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:28,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 03:32:28,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37715603] [2020-08-19 03:32:28,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 03:32:28,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:28,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 03:32:28,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 03:32:28,538 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 6 states. [2020-08-19 03:32:28,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:28,606 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-08-19 03:32:28,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 03:32:28,607 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-08-19 03:32:28,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:28,608 INFO L225 Difference]: With dead ends: 54 [2020-08-19 03:32:28,608 INFO L226 Difference]: Without dead ends: 28 [2020-08-19 03:32:28,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-19 03:32:28,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-19 03:32:28,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-19 03:32:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-19 03:32:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-08-19 03:32:28,617 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2020-08-19 03:32:28,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:28,618 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-08-19 03:32:28,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 03:32:28,618 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-08-19 03:32:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-19 03:32:28,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:28,620 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:28,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 03:32:28,620 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:28,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-08-19 03:32:28,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:28,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600553691] [2020-08-19 03:32:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:28,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:28,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:28,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:28,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:32:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:28,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:29,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-19 03:32:29,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600553691] [2020-08-19 03:32:29,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:29,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 03:32:29,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025941043] [2020-08-19 03:32:29,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 03:32:29,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:29,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 03:32:29,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-08-19 03:32:29,103 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 19 states. [2020-08-19 03:32:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:29,544 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-08-19 03:32:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 03:32:29,545 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-08-19 03:32:29,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:29,546 INFO L225 Difference]: With dead ends: 39 [2020-08-19 03:32:29,547 INFO L226 Difference]: Without dead ends: 35 [2020-08-19 03:32:29,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-08-19 03:32:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-19 03:32:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-08-19 03:32:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-19 03:32:29,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-08-19 03:32:29,556 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 44 [2020-08-19 03:32:29,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:29,556 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-08-19 03:32:29,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 03:32:29,557 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-08-19 03:32:29,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 03:32:29,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:29,558 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:29,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 03:32:29,559 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:29,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:29,559 INFO L82 PathProgramCache]: Analyzing trace with hash 430867302, now seen corresponding path program 4 times [2020-08-19 03:32:29,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:29,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225051823] [2020-08-19 03:32:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:29,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:29,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:29,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:29,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:32:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:29,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:29,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:29,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-08-19 03:32:30,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225051823] [2020-08-19 03:32:30,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:30,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 03:32:30,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757571435] [2020-08-19 03:32:30,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 03:32:30,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:30,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 03:32:30,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-08-19 03:32:30,033 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 21 states. [2020-08-19 03:32:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:30,649 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-08-19 03:32:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 03:32:30,650 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-08-19 03:32:30,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:30,652 INFO L225 Difference]: With dead ends: 42 [2020-08-19 03:32:30,653 INFO L226 Difference]: Without dead ends: 38 [2020-08-19 03:32:30,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2020-08-19 03:32:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-19 03:32:30,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-19 03:32:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-19 03:32:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-08-19 03:32:30,663 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 51 [2020-08-19 03:32:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:30,664 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-08-19 03:32:30,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 03:32:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-08-19 03:32:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 03:32:30,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:30,665 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:30,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 03:32:30,675 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:30,675 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 5 times [2020-08-19 03:32:30,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:30,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249344362] [2020-08-19 03:32:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:30,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:30,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:30,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:30,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:32:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:30,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:31,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:31,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:31,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-08-19 03:32:31,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249344362] [2020-08-19 03:32:31,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:31,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 03:32:31,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885765588] [2020-08-19 03:32:31,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 03:32:31,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:31,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 03:32:31,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-08-19 03:32:31,264 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 23 states. [2020-08-19 03:32:32,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:32,031 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-19 03:32:32,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 03:32:32,032 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2020-08-19 03:32:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:32,033 INFO L225 Difference]: With dead ends: 45 [2020-08-19 03:32:32,033 INFO L226 Difference]: Without dead ends: 41 [2020-08-19 03:32:32,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 03:32:32,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-19 03:32:32,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-08-19 03:32:32,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-19 03:32:32,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-19 03:32:32,048 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 58 [2020-08-19 03:32:32,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:32,048 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-19 03:32:32,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 03:32:32,049 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-19 03:32:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-19 03:32:32,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:32,050 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:32,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 03:32:32,050 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:32,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:32,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1146349017, now seen corresponding path program 6 times [2020-08-19 03:32:32,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:32,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372703991] [2020-08-19 03:32:32,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:32,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:32,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:32,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:32,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:32,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 03:32:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:32,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-19 03:32:32,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372703991] [2020-08-19 03:32:32,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:32,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 03:32:32,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884502804] [2020-08-19 03:32:32,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 03:32:32,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:32,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 03:32:32,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-08-19 03:32:32,345 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 17 states. [2020-08-19 03:32:32,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:32,831 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-08-19 03:32:32,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 03:32:32,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-08-19 03:32:32,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:32,833 INFO L225 Difference]: With dead ends: 47 [2020-08-19 03:32:32,833 INFO L226 Difference]: Without dead ends: 43 [2020-08-19 03:32:32,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2020-08-19 03:32:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-19 03:32:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-19 03:32:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 03:32:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2020-08-19 03:32:32,855 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 44 [2020-08-19 03:32:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:32,856 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2020-08-19 03:32:32,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 03:32:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2020-08-19 03:32:32,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 03:32:32,859 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:32,859 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:32,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 03:32:32,860 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:32,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:32,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1872336740, now seen corresponding path program 7 times [2020-08-19 03:32:32,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:32,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682805640] [2020-08-19 03:32:32,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:32,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:32,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:32,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:33,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:33,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 03:32:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:33,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:33,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-08-19 03:32:33,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682805640] [2020-08-19 03:32:33,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:33,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 03:32:33,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260898711] [2020-08-19 03:32:33,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 03:32:33,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:33,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 03:32:33,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-08-19 03:32:33,203 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand 15 states. [2020-08-19 03:32:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:33,528 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2020-08-19 03:32:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 03:32:33,529 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-08-19 03:32:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:33,531 INFO L225 Difference]: With dead ends: 47 [2020-08-19 03:32:33,531 INFO L226 Difference]: Without dead ends: 43 [2020-08-19 03:32:33,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-08-19 03:32:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-19 03:32:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-19 03:32:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 03:32:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-08-19 03:32:33,540 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 51 [2020-08-19 03:32:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:33,541 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-08-19 03:32:33,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 03:32:33,541 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-08-19 03:32:33,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 03:32:33,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:33,542 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:33,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 03:32:33,543 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:33,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1605933725, now seen corresponding path program 8 times [2020-08-19 03:32:33,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:33,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708646928] [2020-08-19 03:32:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:33,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:33,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:33,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:33,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:33,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 03:32:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:33,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:33,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:34,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-08-19 03:32:34,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708646928] [2020-08-19 03:32:34,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:34,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 03:32:34,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176518374] [2020-08-19 03:32:34,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 03:32:34,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:34,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 03:32:34,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-08-19 03:32:34,054 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 22 states. [2020-08-19 03:32:34,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:34,719 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-08-19 03:32:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 03:32:34,720 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-19 03:32:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:34,722 INFO L225 Difference]: With dead ends: 47 [2020-08-19 03:32:34,722 INFO L226 Difference]: Without dead ends: 43 [2020-08-19 03:32:34,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-08-19 03:32:34,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-19 03:32:34,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-19 03:32:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 03:32:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2020-08-19 03:32:34,731 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 58 [2020-08-19 03:32:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:34,731 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2020-08-19 03:32:34,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 03:32:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2020-08-19 03:32:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 03:32:34,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:34,732 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:34,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 03:32:34,733 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:34,733 INFO L82 PathProgramCache]: Analyzing trace with hash 921134702, now seen corresponding path program 9 times [2020-08-19 03:32:34,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:34,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478269088] [2020-08-19 03:32:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:34,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:34,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:34,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:34,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:35,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 03:32:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:35,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:35,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:35,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:35,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-08-19 03:32:35,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478269088] [2020-08-19 03:32:35,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:35,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 03:32:35,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295809237] [2020-08-19 03:32:35,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 03:32:35,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:35,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 03:32:35,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-08-19 03:32:35,354 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 24 states. [2020-08-19 03:32:36,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:36,180 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-08-19 03:32:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 03:32:36,181 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-08-19 03:32:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:36,182 INFO L225 Difference]: With dead ends: 47 [2020-08-19 03:32:36,183 INFO L226 Difference]: Without dead ends: 43 [2020-08-19 03:32:36,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 03:32:36,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-19 03:32:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-08-19 03:32:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-19 03:32:36,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-19 03:32:36,192 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 65 [2020-08-19 03:32:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:36,193 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-19 03:32:36,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 03:32:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-19 03:32:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 03:32:36,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:36,194 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:36,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 03:32:36,194 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:36,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:36,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 10 times [2020-08-19 03:32:36,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:36,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229335030] [2020-08-19 03:32:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:36,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:36,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:36,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:36,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:32:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:36,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:36,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:36,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:36,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:36,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 11 proven. 95 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-19 03:32:36,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229335030] [2020-08-19 03:32:36,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:36,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 03:32:36,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457889121] [2020-08-19 03:32:36,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 03:32:36,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:36,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 03:32:36,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-08-19 03:32:36,856 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 25 states. [2020-08-19 03:32:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:37,798 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-08-19 03:32:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 03:32:37,798 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-08-19 03:32:37,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:37,800 INFO L225 Difference]: With dead ends: 50 [2020-08-19 03:32:37,800 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 03:32:37,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2020-08-19 03:32:37,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 03:32:37,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-19 03:32:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 03:32:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-19 03:32:37,809 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 65 [2020-08-19 03:32:37,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:37,810 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-19 03:32:37,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 03:32:37,810 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-19 03:32:37,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 03:32:37,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:37,811 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:37,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 03:32:37,812 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:37,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:37,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 11 times [2020-08-19 03:32:37,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:37,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773444491] [2020-08-19 03:32:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:37,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:37,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:37,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:38,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:38,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 03:32:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:38,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:38,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:38,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:38,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:38,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-19 03:32:38,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773444491] [2020-08-19 03:32:38,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:38,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 03:32:38,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824827328] [2020-08-19 03:32:38,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 03:32:38,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:38,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 03:32:38,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-19 03:32:38,592 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 26 states. [2020-08-19 03:32:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:39,719 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-08-19 03:32:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 03:32:39,719 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-19 03:32:39,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:39,720 INFO L225 Difference]: With dead ends: 50 [2020-08-19 03:32:39,720 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 03:32:39,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2020-08-19 03:32:39,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 03:32:39,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-19 03:32:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-19 03:32:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-08-19 03:32:39,729 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 72 [2020-08-19 03:32:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:39,730 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-08-19 03:32:39,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 03:32:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-08-19 03:32:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 03:32:39,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:39,731 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:39,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 03:32:39,732 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:39,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:39,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1677321585, now seen corresponding path program 12 times [2020-08-19 03:32:39,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:39,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907295675] [2020-08-19 03:32:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:39,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:39,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:39,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:39,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:39,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:40,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 03:32:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:40,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:40,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:40,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:40,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-19 03:32:40,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907295675] [2020-08-19 03:32:40,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:40,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 03:32:40,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312147567] [2020-08-19 03:32:40,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 03:32:40,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:40,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 03:32:40,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-19 03:32:40,392 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 26 states. [2020-08-19 03:32:41,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:41,415 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-08-19 03:32:41,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 03:32:41,416 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-19 03:32:41,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:41,417 INFO L225 Difference]: With dead ends: 50 [2020-08-19 03:32:41,417 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 03:32:41,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-08-19 03:32:41,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 03:32:41,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-19 03:32:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 03:32:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-08-19 03:32:41,437 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 72 [2020-08-19 03:32:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:41,438 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-08-19 03:32:41,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 03:32:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-08-19 03:32:41,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 03:32:41,439 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:41,439 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:41,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 03:32:41,440 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:41,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1255254341, now seen corresponding path program 13 times [2020-08-19 03:32:41,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:41,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382622686] [2020-08-19 03:32:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:41,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:41,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:41,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:41,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:41,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:41,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 03:32:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:41,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:42,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-08-19 03:32:42,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382622686] [2020-08-19 03:32:42,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:42,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 03:32:42,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707519037] [2020-08-19 03:32:42,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 03:32:42,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:42,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 03:32:42,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-08-19 03:32:42,061 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 22 states. [2020-08-19 03:32:42,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:42,796 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2020-08-19 03:32:42,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 03:32:42,797 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-19 03:32:42,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:42,798 INFO L225 Difference]: With dead ends: 50 [2020-08-19 03:32:42,798 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 03:32:42,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-08-19 03:32:42,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 03:32:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-19 03:32:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 03:32:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2020-08-19 03:32:42,806 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 58 [2020-08-19 03:32:42,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:42,807 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2020-08-19 03:32:42,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 03:32:42,807 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2020-08-19 03:32:42,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 03:32:42,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:42,808 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:42,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 03:32:42,808 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:42,809 INFO L82 PathProgramCache]: Analyzing trace with hash 912513436, now seen corresponding path program 14 times [2020-08-19 03:32:42,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:42,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286418221] [2020-08-19 03:32:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:42,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:42,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:42,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:42,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:43,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:43,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 03:32:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:43,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:43,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:43,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 82 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-19 03:32:43,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286418221] [2020-08-19 03:32:43,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:43,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 03:32:43,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765685088] [2020-08-19 03:32:43,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 03:32:43,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:43,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 03:32:43,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-19 03:32:43,212 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 17 states. [2020-08-19 03:32:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:43,724 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-08-19 03:32:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 03:32:43,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-08-19 03:32:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:43,726 INFO L225 Difference]: With dead ends: 50 [2020-08-19 03:32:43,726 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 03:32:43,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-19 03:32:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 03:32:43,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-19 03:32:43,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 03:32:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2020-08-19 03:32:43,733 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 58 transitions. Word has length 65 [2020-08-19 03:32:43,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:43,733 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 58 transitions. [2020-08-19 03:32:43,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 03:32:43,733 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 58 transitions. [2020-08-19 03:32:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 03:32:43,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:43,734 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:43,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 03:32:43,735 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:43,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:43,735 INFO L82 PathProgramCache]: Analyzing trace with hash -746065050, now seen corresponding path program 15 times [2020-08-19 03:32:43,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:43,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339392795] [2020-08-19 03:32:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:43,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:43,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:43,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:43,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:43,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:44,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 03:32:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:44,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-08-19 03:32:44,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339392795] [2020-08-19 03:32:44,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:44,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 03:32:44,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817581056] [2020-08-19 03:32:44,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 03:32:44,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:44,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 03:32:44,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-08-19 03:32:44,168 INFO L87 Difference]: Start difference. First operand 42 states and 58 transitions. Second operand 19 states. [2020-08-19 03:32:44,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:44,766 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-08-19 03:32:44,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 03:32:44,767 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-08-19 03:32:44,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:44,768 INFO L225 Difference]: With dead ends: 50 [2020-08-19 03:32:44,768 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 03:32:44,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-08-19 03:32:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 03:32:44,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-19 03:32:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 03:32:44,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-19 03:32:44,777 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 51 [2020-08-19 03:32:44,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:44,778 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-19 03:32:44,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 03:32:44,778 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-19 03:32:44,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 03:32:44,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:44,779 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:44,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 03:32:44,780 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:44,780 INFO L82 PathProgramCache]: Analyzing trace with hash -2039564078, now seen corresponding path program 16 times [2020-08-19 03:32:44,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:44,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037792747] [2020-08-19 03:32:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:44,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:44,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:44,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:44,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:45,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:45,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 03:32:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:45,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:45,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:45,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:45,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:45,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-08-19 03:32:45,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037792747] [2020-08-19 03:32:45,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:45,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-19 03:32:45,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897692037] [2020-08-19 03:32:45,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-19 03:32:45,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:45,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-19 03:32:45,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-08-19 03:32:45,631 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 28 states. [2020-08-19 03:32:46,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:46,833 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-08-19 03:32:46,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 03:32:46,834 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-19 03:32:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:46,835 INFO L225 Difference]: With dead ends: 50 [2020-08-19 03:32:46,836 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 03:32:46,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-08-19 03:32:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 03:32:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-19 03:32:46,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-19 03:32:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-08-19 03:32:46,843 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 79 [2020-08-19 03:32:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:46,843 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-08-19 03:32:46,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-19 03:32:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-08-19 03:32:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 03:32:46,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:46,844 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:46,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 03:32:46,845 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:46,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 17 times [2020-08-19 03:32:46,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:46,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669400721] [2020-08-19 03:32:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:46,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:46,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:47,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:47,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:32:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:47,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:47,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:47,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:47,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:47,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:47,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 13 proven. 121 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-08-19 03:32:47,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669400721] [2020-08-19 03:32:47,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:47,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 03:32:47,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487028910] [2020-08-19 03:32:47,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 03:32:47,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:47,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 03:32:47,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2020-08-19 03:32:47,760 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 27 states. [2020-08-19 03:32:48,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:48,952 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-08-19 03:32:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 03:32:48,953 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2020-08-19 03:32:48,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:48,954 INFO L225 Difference]: With dead ends: 53 [2020-08-19 03:32:48,954 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 03:32:48,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2020-08-19 03:32:48,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 03:32:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-19 03:32:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 03:32:48,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-19 03:32:48,961 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 72 [2020-08-19 03:32:48,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:48,962 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-19 03:32:48,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 03:32:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-19 03:32:48,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 03:32:48,963 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:48,963 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:48,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 03:32:48,963 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:48,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:48,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1806425208, now seen corresponding path program 18 times [2020-08-19 03:32:48,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:48,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494628532] [2020-08-19 03:32:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:49,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:49,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:49,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:49,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:49,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 03:32:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:49,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:49,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:49,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:49,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:49,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:49,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-08-19 03:32:49,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494628532] [2020-08-19 03:32:49,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:49,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-19 03:32:49,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750426743] [2020-08-19 03:32:49,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-19 03:32:49,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:49,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-19 03:32:49,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-08-19 03:32:49,779 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 28 states. [2020-08-19 03:32:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:51,126 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-08-19 03:32:51,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 03:32:51,126 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-19 03:32:51,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:51,128 INFO L225 Difference]: With dead ends: 55 [2020-08-19 03:32:51,128 INFO L226 Difference]: Without dead ends: 51 [2020-08-19 03:32:51,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2020-08-19 03:32:51,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-19 03:32:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-08-19 03:32:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 03:32:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-19 03:32:51,135 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 79 [2020-08-19 03:32:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:51,136 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-19 03:32:51,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-19 03:32:51,136 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-19 03:32:51,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 03:32:51,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:51,138 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:51,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 03:32:51,138 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:51,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:51,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1615348441, now seen corresponding path program 19 times [2020-08-19 03:32:51,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:51,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117574045] [2020-08-19 03:32:51,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:51,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:51,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:51,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:51,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:51,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:51,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 03:32:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:51,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:51,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:51,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:51,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:51,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:52,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-19 03:32:52,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117574045] [2020-08-19 03:32:52,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:52,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-19 03:32:52,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774841632] [2020-08-19 03:32:52,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-19 03:32:52,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:52,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-19 03:32:52,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-19 03:32:52,114 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 30 states. [2020-08-19 03:32:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:53,674 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-08-19 03:32:53,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 03:32:53,674 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-19 03:32:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:53,676 INFO L225 Difference]: With dead ends: 53 [2020-08-19 03:32:53,676 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 03:32:53,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=169, Invalid=1811, Unknown=0, NotChecked=0, Total=1980 [2020-08-19 03:32:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 03:32:53,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-19 03:32:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 03:32:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-08-19 03:32:53,692 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 86 [2020-08-19 03:32:53,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:53,693 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-08-19 03:32:53,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-19 03:32:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-08-19 03:32:53,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 03:32:53,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:53,695 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:53,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 03:32:53,696 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:53,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1524702692, now seen corresponding path program 20 times [2020-08-19 03:32:53,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:53,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656397364] [2020-08-19 03:32:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:53,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:53,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:53,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:53,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:54,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:54,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:54,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 03:32:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:54,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:54,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:54,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:54,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 134 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-08-19 03:32:54,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656397364] [2020-08-19 03:32:54,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:54,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 03:32:54,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150086297] [2020-08-19 03:32:54,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 03:32:54,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:54,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 03:32:54,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-08-19 03:32:54,375 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 19 states. [2020-08-19 03:32:55,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:55,132 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2020-08-19 03:32:55,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 03:32:55,132 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-08-19 03:32:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:55,134 INFO L225 Difference]: With dead ends: 53 [2020-08-19 03:32:55,136 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 03:32:55,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2020-08-19 03:32:55,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 03:32:55,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-19 03:32:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 03:32:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 66 transitions. [2020-08-19 03:32:55,147 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 66 transitions. Word has length 79 [2020-08-19 03:32:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:55,147 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 66 transitions. [2020-08-19 03:32:55,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 03:32:55,147 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 66 transitions. [2020-08-19 03:32:55,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 03:32:55,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:55,151 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:55,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 03:32:55,152 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:55,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:55,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1830896665, now seen corresponding path program 21 times [2020-08-19 03:32:55,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:55,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77329854] [2020-08-19 03:32:55,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:55,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:55,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:55,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:55,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:55,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:55,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:55,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 03:32:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:55,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:55,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:55,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 119 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-19 03:32:55,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77329854] [2020-08-19 03:32:55,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:55,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 03:32:55,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485143731] [2020-08-19 03:32:55,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 03:32:55,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:55,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 03:32:55,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-19 03:32:55,932 INFO L87 Difference]: Start difference. First operand 45 states and 66 transitions. Second operand 26 states. [2020-08-19 03:32:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:56,986 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2020-08-19 03:32:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 03:32:56,987 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-19 03:32:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:56,988 INFO L225 Difference]: With dead ends: 53 [2020-08-19 03:32:56,988 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 03:32:56,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-08-19 03:32:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 03:32:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-19 03:32:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 03:32:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2020-08-19 03:32:56,994 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 72 [2020-08-19 03:32:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:56,994 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 65 transitions. [2020-08-19 03:32:56,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 03:32:56,995 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2020-08-19 03:32:56,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 03:32:56,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:56,995 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:56,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 03:32:56,996 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:56,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:56,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2003180303, now seen corresponding path program 22 times [2020-08-19 03:32:56,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:56,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340058137] [2020-08-19 03:32:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:57,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:57,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:57,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:57,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:57,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:57,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:57,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 03:32:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:57,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-19 03:32:57,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340058137] [2020-08-19 03:32:57,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:57,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 03:32:57,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440157415] [2020-08-19 03:32:57,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 03:32:57,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:57,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 03:32:57,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-08-19 03:32:57,531 INFO L87 Difference]: Start difference. First operand 45 states and 65 transitions. Second operand 21 states. [2020-08-19 03:32:58,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:32:58,373 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2020-08-19 03:32:58,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 03:32:58,374 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-08-19 03:32:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:32:58,375 INFO L225 Difference]: With dead ends: 53 [2020-08-19 03:32:58,375 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 03:32:58,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 03:32:58,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 03:32:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-19 03:32:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 03:32:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-08-19 03:32:58,381 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 58 [2020-08-19 03:32:58,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:32:58,382 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-08-19 03:32:58,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 03:32:58,382 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-08-19 03:32:58,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-19 03:32:58,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:32:58,383 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:32:58,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 03:32:58,383 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:32:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:32:58,383 INFO L82 PathProgramCache]: Analyzing trace with hash -335786642, now seen corresponding path program 23 times [2020-08-19 03:32:58,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:32:58,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842338543] [2020-08-19 03:32:58,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:32:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:58,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:32:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:58,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:32:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:58,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:58,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:58,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:58,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:58,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 03:32:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:58,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:59,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:59,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:59,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:59,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:59,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:32:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:32:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-08-19 03:32:59,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842338543] [2020-08-19 03:32:59,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:32:59,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-19 03:32:59,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569261989] [2020-08-19 03:32:59,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-19 03:32:59,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:32:59,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-19 03:32:59,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-08-19 03:32:59,551 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 32 states. [2020-08-19 03:33:01,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:01,272 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2020-08-19 03:33:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 03:33:01,273 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-08-19 03:33:01,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:01,275 INFO L225 Difference]: With dead ends: 53 [2020-08-19 03:33:01,275 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 03:33:01,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=175, Invalid=1987, Unknown=0, NotChecked=0, Total=2162 [2020-08-19 03:33:01,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 03:33:01,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-19 03:33:01,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 03:33:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2020-08-19 03:33:01,282 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 93 [2020-08-19 03:33:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:01,282 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2020-08-19 03:33:01,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-19 03:33:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2020-08-19 03:33:01,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 03:33:01,283 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:01,283 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:01,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 03:33:01,284 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:01,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:01,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1937884195, now seen corresponding path program 24 times [2020-08-19 03:33:01,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:01,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974010972] [2020-08-19 03:33:01,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:01,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:01,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:33:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:01,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:01,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:01,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:01,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:01,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 03:33:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:01,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:01,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:01,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:02,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:02,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-19 03:33:02,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974010972] [2020-08-19 03:33:02,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:02,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-19 03:33:02,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752017370] [2020-08-19 03:33:02,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-19 03:33:02,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:02,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-19 03:33:02,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-19 03:33:02,192 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand 30 states. [2020-08-19 03:33:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:04,181 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-08-19 03:33:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 03:33:04,181 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-19 03:33:04,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:04,182 INFO L225 Difference]: With dead ends: 53 [2020-08-19 03:33:04,182 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 03:33:04,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2020-08-19 03:33:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 03:33:04,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-19 03:33:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 03:33:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-19 03:33:04,188 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 86 [2020-08-19 03:33:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:04,188 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-19 03:33:04,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-19 03:33:04,188 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-19 03:33:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 03:33:04,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:04,189 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:04,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 03:33:04,190 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:04,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:04,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1394734426, now seen corresponding path program 25 times [2020-08-19 03:33:04,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:04,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795257756] [2020-08-19 03:33:04,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:04,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:04,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:33:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:04,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:04,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:04,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:04,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:04,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 03:33:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:04,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:04,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-08-19 03:33:04,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795257756] [2020-08-19 03:33:04,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:04,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 03:33:04,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190915980] [2020-08-19 03:33:04,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 03:33:04,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:04,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 03:33:04,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-08-19 03:33:04,797 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 24 states. [2020-08-19 03:33:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:05,737 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-08-19 03:33:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 03:33:05,738 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-08-19 03:33:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:05,739 INFO L225 Difference]: With dead ends: 53 [2020-08-19 03:33:05,739 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 03:33:05,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 03:33:05,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 03:33:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-19 03:33:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 03:33:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-08-19 03:33:05,746 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 65 [2020-08-19 03:33:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:05,747 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-08-19 03:33:05,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 03:33:05,747 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-08-19 03:33:05,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 03:33:05,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:05,748 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:05,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 03:33:05,748 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:05,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:05,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 26 times [2020-08-19 03:33:05,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:05,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073249942] [2020-08-19 03:33:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:05,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:05,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:33:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:05,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:05,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 03:33:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:06,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:06,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:06,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:06,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:06,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:06,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:06,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-08-19 03:33:06,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073249942] [2020-08-19 03:33:06,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:06,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-19 03:33:06,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100055369] [2020-08-19 03:33:06,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-19 03:33:06,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:06,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-19 03:33:06,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2020-08-19 03:33:06,722 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 29 states. [2020-08-19 03:33:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:08,335 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-08-19 03:33:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 03:33:08,336 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-08-19 03:33:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:08,338 INFO L225 Difference]: With dead ends: 56 [2020-08-19 03:33:08,338 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 03:33:08,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2020-08-19 03:33:08,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 03:33:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-08-19 03:33:08,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 03:33:08,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-19 03:33:08,345 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 79 [2020-08-19 03:33:08,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:08,346 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-19 03:33:08,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-19 03:33:08,346 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-19 03:33:08,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 03:33:08,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:08,347 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:08,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 03:33:08,347 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:08,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:08,348 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 27 times [2020-08-19 03:33:08,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:08,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699318049] [2020-08-19 03:33:08,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:08,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:08,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:33:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:08,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:08,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:08,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 03:33:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:08,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:08,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:08,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:08,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:09,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:09,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:09,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-19 03:33:09,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699318049] [2020-08-19 03:33:09,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:09,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-19 03:33:09,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756718131] [2020-08-19 03:33:09,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-19 03:33:09,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:09,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-19 03:33:09,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-19 03:33:09,482 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 30 states. [2020-08-19 03:33:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:11,155 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-08-19 03:33:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 03:33:11,156 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-19 03:33:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:11,157 INFO L225 Difference]: With dead ends: 58 [2020-08-19 03:33:11,157 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 03:33:11,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=181, Invalid=1981, Unknown=0, NotChecked=0, Total=2162 [2020-08-19 03:33:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 03:33:11,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-19 03:33:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 03:33:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-19 03:33:11,167 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 86 [2020-08-19 03:33:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:11,168 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-19 03:33:11,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-19 03:33:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-19 03:33:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-19 03:33:11,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:11,170 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:11,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 03:33:11,171 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:11,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:11,171 INFO L82 PathProgramCache]: Analyzing trace with hash -313052920, now seen corresponding path program 28 times [2020-08-19 03:33:11,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:11,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815866052] [2020-08-19 03:33:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:11,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:11,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:33:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:11,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:11,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:11,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:11,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 03:33:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:11,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:11,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:11,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:11,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:12,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:12,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:12,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-08-19 03:33:12,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815866052] [2020-08-19 03:33:12,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:12,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-19 03:33:12,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970473817] [2020-08-19 03:33:12,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-19 03:33:12,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:12,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-19 03:33:12,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-08-19 03:33:12,364 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 32 states. [2020-08-19 03:33:14,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:14,239 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-08-19 03:33:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 03:33:14,240 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-08-19 03:33:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:14,242 INFO L225 Difference]: With dead ends: 58 [2020-08-19 03:33:14,242 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 03:33:14,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=187, Invalid=2165, Unknown=0, NotChecked=0, Total=2352 [2020-08-19 03:33:14,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 03:33:14,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-19 03:33:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 03:33:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-19 03:33:14,250 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 93 [2020-08-19 03:33:14,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:14,250 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-19 03:33:14,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-19 03:33:14,250 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-19 03:33:14,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-19 03:33:14,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:14,251 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:14,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 03:33:14,252 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:14,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:14,252 INFO L82 PathProgramCache]: Analyzing trace with hash -789379885, now seen corresponding path program 29 times [2020-08-19 03:33:14,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:14,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735057230] [2020-08-19 03:33:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:14,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:14,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:33:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:14,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:14,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:14,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:14,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:14,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 03:33:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:14,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:14,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:15,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:15,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:15,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:15,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:15,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-08-19 03:33:15,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735057230] [2020-08-19 03:33:15,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:15,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-19 03:33:15,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843941] [2020-08-19 03:33:15,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-19 03:33:15,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:15,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-19 03:33:15,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1050, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 03:33:15,715 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 34 states. [2020-08-19 03:33:17,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:17,797 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-08-19 03:33:17,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 03:33:17,797 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 100 [2020-08-19 03:33:17,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:17,798 INFO L225 Difference]: With dead ends: 56 [2020-08-19 03:33:17,798 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 03:33:17,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=193, Invalid=2357, Unknown=0, NotChecked=0, Total=2550 [2020-08-19 03:33:17,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 03:33:17,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-08-19 03:33:17,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 03:33:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-08-19 03:33:17,805 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 100 [2020-08-19 03:33:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:17,805 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-08-19 03:33:17,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-19 03:33:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-08-19 03:33:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-19 03:33:17,806 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:17,806 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:17,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 03:33:17,806 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:17,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:17,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1159270008, now seen corresponding path program 30 times [2020-08-19 03:33:17,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:17,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947961238] [2020-08-19 03:33:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:17,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:17,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:33:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:17,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:17,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:18,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:18,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:18,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:18,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 03:33:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:18,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:18,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:18,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:18,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:18,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 198 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-08-19 03:33:18,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947961238] [2020-08-19 03:33:18,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:18,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 03:33:18,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930239548] [2020-08-19 03:33:18,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 03:33:18,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:18,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 03:33:18,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-08-19 03:33:18,459 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 21 states. [2020-08-19 03:33:19,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:33:19,486 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2020-08-19 03:33:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 03:33:19,486 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-08-19 03:33:19,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:33:19,487 INFO L225 Difference]: With dead ends: 56 [2020-08-19 03:33:19,488 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 03:33:19,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 03:33:19,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 03:33:19,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-08-19 03:33:19,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 03:33:19,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 72 transitions. [2020-08-19 03:33:19,494 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 72 transitions. Word has length 93 [2020-08-19 03:33:19,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:33:19,495 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 72 transitions. [2020-08-19 03:33:19,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 03:33:19,495 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 72 transitions. [2020-08-19 03:33:19,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 03:33:19,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:33:19,496 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:33:19,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-19 03:33:19,496 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:33:19,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:33:19,497 INFO L82 PathProgramCache]: Analyzing trace with hash -505812782, now seen corresponding path program 31 times [2020-08-19 03:33:19,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:33:19,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203888246] [2020-08-19 03:33:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:33:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:19,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:33:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:19,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 03:33:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:19,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:19,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:19,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:19,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:19,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:20,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 03:33:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:20,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:20,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:20,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 03:33:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:33:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 148 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-08-19 03:33:20,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203888246] [2020-08-19 03:33:20,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:33:20,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-19 03:33:20,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691682425] [2020-08-19 03:33:20,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-19 03:33:20,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:33:20,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-19 03:33:20,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-08-19 03:33:20,475 INFO L87 Difference]: Start difference. First operand 48 states and 72 transitions. Second operand 28 states.