/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 --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:29:39,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:29:39,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:29:39,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:29:39,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:29:39,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:29:39,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:29:39,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:29:39,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:29:39,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:29:39,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:29:39,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:29:39,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:29:39,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:29:39,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:29:39,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:29:39,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:29:39,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:29:39,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:29:39,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:29:39,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:29:39,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:29:39,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:29:39,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:29:39,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:29:39,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:29:39,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:29:39,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:29:39,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:29:39,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:29:39,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:29:39,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:29:39,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:29:39,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:29:39,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:29:39,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:29:39,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:29:39,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:29:39,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:29:39,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:29:39,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:29:39,629 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 [2020-10-12 19:29:39,673 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:29:39,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:29:39,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:29:39,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:29:39,676 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:29:39,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:29:39,676 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:29:39,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:29:39,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:29:39,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:29:39,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:29:39,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:29:39,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:29:39,679 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:29:39,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:29:39,679 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:29:39,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:29:39,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:29:39,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:29:39,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:29:39,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:29:39,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:29:39,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:29:39,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:29:39,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:29:39,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:29:39,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:29:39,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:29:39,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:29:39,682 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.rcfgbuilder: Size of a code block -> SequenceOfStatements 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:29:40,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:29:40,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:29:40,017 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:29:40,019 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:29:40,019 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:29:40,020 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:29:40,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de500c025/76da8c192eb34eefa44c9a30afa54a39/FLAGe055f67d1 [2020-10-12 19:29:40,618 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:29:40,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:29:40,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de500c025/76da8c192eb34eefa44c9a30afa54a39/FLAGe055f67d1 [2020-10-12 19:29:40,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de500c025/76da8c192eb34eefa44c9a30afa54a39 [2020-10-12 19:29:40,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:29:40,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:29:40,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:29:40,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:29:40,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:29:40,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:29:40" (1/1) ... [2020-10-12 19:29:40,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a3fa750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:40, skipping insertion in model container [2020-10-12 19:29:40,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:29:40" (1/1) ... [2020-10-12 19:29:40,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:29:41,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:29:41,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:29:41,271 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:29:41,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:29:41,473 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:29:41,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:41 WrapperNode [2020-10-12 19:29:41,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:29:41,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:29:41,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:29:41,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:29:41,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:41" (1/1) ... [2020-10-12 19:29:41,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:41" (1/1) ... [2020-10-12 19:29:41,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:41" (1/1) ... [2020-10-12 19:29:41,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:41" (1/1) ... [2020-10-12 19:29:41,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:41" (1/1) ... [2020-10-12 19:29:41,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:41" (1/1) ... [2020-10-12 19:29:41,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:41" (1/1) ... [2020-10-12 19:29:41,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:29:41,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:29:41,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:29:41,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:29:41,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:41" (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 [2020-10-12 19:29:41,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:29:41,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:29:41,583 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:29:41,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:29:41,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:29:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:29:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:29:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:29:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:29:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:29:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:29:41,584 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:29:41,585 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:29:41,585 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:29:41,585 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:29:41,585 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:29:41,585 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:29:41,585 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:29:41,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:29:41,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:29:41,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:29:42,073 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:29:42,073 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:29:42,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:29:42 BoogieIcfgContainer [2020-10-12 19:29:42,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:29:42,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:29:42,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:29:42,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:29:42,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:29:40" (1/3) ... [2020-10-12 19:29:42,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69295d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:29:42, skipping insertion in model container [2020-10-12 19:29:42,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:29:41" (2/3) ... [2020-10-12 19:29:42,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69295d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:29:42, skipping insertion in model container [2020-10-12 19:29:42,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:29:42" (3/3) ... [2020-10-12 19:29:42,088 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:29:42,099 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:29:42,107 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:29:42,122 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:29:42,148 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:29:42,148 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:29:42,148 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:29:42,149 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:29:42,149 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:29:42,149 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:29:42,149 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:29:42,150 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:29:42,168 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2020-10-12 19:29:42,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 19:29:42,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:42,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:42,177 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:42,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:42,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1464413452, now seen corresponding path program 1 times [2020-10-12 19:29:42,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:42,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62322187] [2020-10-12 19:29:42,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:42,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:42,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:42,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:43,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:44,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:44,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 19:29:44,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:29:44,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2141 [2020-10-12 19:29:44,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:44,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:29:44,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:29:44,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 19:29:44,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 18 [2020-10-12 19:29:44,847 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-12 19:29:44,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:44,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:44,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:44,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:44,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:44,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 19:29:44,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:44,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:29:44,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:44,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:29:44,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:29:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:44,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62322187] [2020-10-12 19:29:44,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:44,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:29:44,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817452731] [2020-10-12 19:29:44,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:29:44,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:44,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:29:44,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:29:44,945 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 6 states. [2020-10-12 19:29:45,150 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-12 19:29:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:45,540 INFO L93 Difference]: Finished difference Result 164 states and 251 transitions. [2020-10-12 19:29:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:29:45,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-12 19:29:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:45,556 INFO L225 Difference]: With dead ends: 164 [2020-10-12 19:29:45,556 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 19:29:45,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:29:45,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 19:29:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-10-12 19:29:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 19:29:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 151 transitions. [2020-10-12 19:29:45,618 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 151 transitions. Word has length 41 [2020-10-12 19:29:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:45,619 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 151 transitions. [2020-10-12 19:29:45,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:29:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 151 transitions. [2020-10-12 19:29:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 19:29:45,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:45,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:45,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:29:45,623 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:45,623 INFO L82 PathProgramCache]: Analyzing trace with hash -598881063, now seen corresponding path program 1 times [2020-10-12 19:29:45,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:45,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246636922] [2020-10-12 19:29:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:45,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:45,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:45,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:46,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:46,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 19:29:46,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:29:46,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-12 19:29:46,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:46,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:29:46,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:29:46,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 19:29:46,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:29:46,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:46,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:46,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:46,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:46,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:46,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:29:46,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:46,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:46,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:46,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:46,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:46,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246636922] [2020-10-12 19:29:46,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:46,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:29:46,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838265742] [2020-10-12 19:29:46,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:29:46,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:46,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:29:46,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:29:46,223 INFO L87 Difference]: Start difference. First operand 104 states and 151 transitions. Second operand 6 states. [2020-10-12 19:29:46,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:46,721 INFO L93 Difference]: Finished difference Result 590 states and 919 transitions. [2020-10-12 19:29:46,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:29:46,722 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-12 19:29:46,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:46,727 INFO L225 Difference]: With dead ends: 590 [2020-10-12 19:29:46,727 INFO L226 Difference]: Without dead ends: 509 [2020-10-12 19:29:46,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:29:46,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2020-10-12 19:29:46,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 183. [2020-10-12 19:29:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-12 19:29:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 274 transitions. [2020-10-12 19:29:46,778 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 274 transitions. Word has length 41 [2020-10-12 19:29:46,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:46,779 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 274 transitions. [2020-10-12 19:29:46,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:29:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 274 transitions. [2020-10-12 19:29:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 19:29:46,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:46,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:46,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:29:46,785 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:46,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:46,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1169603652, now seen corresponding path program 1 times [2020-10-12 19:29:46,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:46,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377002432] [2020-10-12 19:29:46,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:46,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:46,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:46,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:46,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:47,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:48,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:48,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 19:29:48,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:29:48,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1385 [2020-10-12 19:29:48,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:48,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:29:48,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:29:48,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 19:29:48,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:48,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:48,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:48,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:48,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:48,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:48,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 19:29:48,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:29:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:29:48,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:48,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377002432] [2020-10-12 19:29:48,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:48,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:29:48,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638684466] [2020-10-12 19:29:48,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:29:48,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:48,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:29:48,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:29:48,448 INFO L87 Difference]: Start difference. First operand 183 states and 274 transitions. Second operand 7 states. [2020-10-12 19:29:48,589 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-12 19:29:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:49,001 INFO L93 Difference]: Finished difference Result 550 states and 841 transitions. [2020-10-12 19:29:49,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:29:49,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-12 19:29:49,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:49,005 INFO L225 Difference]: With dead ends: 550 [2020-10-12 19:29:49,005 INFO L226 Difference]: Without dead ends: 390 [2020-10-12 19:29:49,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:29:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-12 19:29:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 206. [2020-10-12 19:29:49,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-12 19:29:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 306 transitions. [2020-10-12 19:29:49,052 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 306 transitions. Word has length 43 [2020-10-12 19:29:49,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:49,053 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 306 transitions. [2020-10-12 19:29:49,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:29:49,053 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 306 transitions. [2020-10-12 19:29:49,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 19:29:49,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:49,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:49,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:29:49,055 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:49,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1193348874, now seen corresponding path program 1 times [2020-10-12 19:29:49,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:49,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462281964] [2020-10-12 19:29:49,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:49,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:49,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:49,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:49,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:49,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:50,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:50,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 19:29:50,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:29:50,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-10-12 19:29:50,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:29:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:29:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 19:29:50,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:50,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:50,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:50,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:50,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:50,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:50,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:29:50,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:50,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:29:50,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:50,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:29:50,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:29:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:50,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462281964] [2020-10-12 19:29:50,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:50,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:29:50,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085143481] [2020-10-12 19:29:50,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:29:50,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:50,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:29:50,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:29:50,326 INFO L87 Difference]: Start difference. First operand 206 states and 306 transitions. Second operand 7 states. [2020-10-12 19:29:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:50,904 INFO L93 Difference]: Finished difference Result 534 states and 810 transitions. [2020-10-12 19:29:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:29:50,905 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-12 19:29:50,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:50,908 INFO L225 Difference]: With dead ends: 534 [2020-10-12 19:29:50,909 INFO L226 Difference]: Without dead ends: 374 [2020-10-12 19:29:50,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:29:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-12 19:29:50,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 230. [2020-10-12 19:29:50,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-12 19:29:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 339 transitions. [2020-10-12 19:29:50,950 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 339 transitions. Word has length 43 [2020-10-12 19:29:50,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:50,953 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 339 transitions. [2020-10-12 19:29:50,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:29:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 339 transitions. [2020-10-12 19:29:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 19:29:50,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:50,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:50,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:29:50,957 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:50,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:50,958 INFO L82 PathProgramCache]: Analyzing trace with hash -872228301, now seen corresponding path program 1 times [2020-10-12 19:29:50,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:50,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143283878] [2020-10-12 19:29:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:50,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:51,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:51,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:51,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:51,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 19:29:51,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:29:51,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-12 19:29:51,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:51,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:29:51,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:29:51,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 19:29:51,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:51,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:51,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:51,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:51,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:51,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:51,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:29:51,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:51,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:51,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:51,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:51,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:51,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143283878] [2020-10-12 19:29:51,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:51,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:29:51,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254534152] [2020-10-12 19:29:51,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:29:51,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:51,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:29:51,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:29:51,517 INFO L87 Difference]: Start difference. First operand 230 states and 339 transitions. Second operand 6 states. [2020-10-12 19:29:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:52,008 INFO L93 Difference]: Finished difference Result 716 states and 1095 transitions. [2020-10-12 19:29:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:29:52,008 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-12 19:29:52,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:52,012 INFO L225 Difference]: With dead ends: 716 [2020-10-12 19:29:52,012 INFO L226 Difference]: Without dead ends: 556 [2020-10-12 19:29:52,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:29:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-12 19:29:52,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 230. [2020-10-12 19:29:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-12 19:29:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 337 transitions. [2020-10-12 19:29:52,071 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 337 transitions. Word has length 43 [2020-10-12 19:29:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:52,071 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 337 transitions. [2020-10-12 19:29:52,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:29:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 337 transitions. [2020-10-12 19:29:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 19:29:52,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:52,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:52,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:29:52,073 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash -892277644, now seen corresponding path program 1 times [2020-10-12 19:29:52,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:52,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462039503] [2020-10-12 19:29:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:52,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:52,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:52,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:52,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:52,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:52,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:52,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 19:29:52,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:29:52,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-12 19:29:52,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:52,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:29:52,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 19:29:52,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:29:52,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:29:52,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:52,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:52,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:52,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:52,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:52,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:29:52,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:52,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 19:29:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:52,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462039503] [2020-10-12 19:29:52,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:52,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:29:52,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198422747] [2020-10-12 19:29:52,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:29:52,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:52,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:29:52,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:29:52,766 INFO L87 Difference]: Start difference. First operand 230 states and 337 transitions. Second operand 5 states. [2020-10-12 19:29:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:53,198 INFO L93 Difference]: Finished difference Result 398 states and 594 transitions. [2020-10-12 19:29:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:29:53,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-12 19:29:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:53,205 INFO L225 Difference]: With dead ends: 398 [2020-10-12 19:29:53,205 INFO L226 Difference]: Without dead ends: 396 [2020-10-12 19:29:53,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:29:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-12 19:29:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 238. [2020-10-12 19:29:53,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-12 19:29:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 345 transitions. [2020-10-12 19:29:53,250 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 345 transitions. Word has length 43 [2020-10-12 19:29:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:53,251 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 345 transitions. [2020-10-12 19:29:53,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:29:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 345 transitions. [2020-10-12 19:29:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 19:29:53,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:53,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:53,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:29:53,253 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:53,254 INFO L82 PathProgramCache]: Analyzing trace with hash 715061754, now seen corresponding path program 1 times [2020-10-12 19:29:53,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:53,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362210333] [2020-10-12 19:29:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:53,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:53,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:53,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:53,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:53,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:53,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:54,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:58,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:58,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 19:29:58,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:29:58,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4747 [2020-10-12 19:29:58,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:29:58,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:29:58,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 19:29:58,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:29:58,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:58,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:58,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:58,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:58,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:58,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 19:29:58,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:58,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:29:58,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:58,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:29:58,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:58,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362210333] [2020-10-12 19:29:58,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:58,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:29:58,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830751706] [2020-10-12 19:29:58,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:29:58,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:58,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:29:58,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:29:58,248 INFO L87 Difference]: Start difference. First operand 238 states and 345 transitions. Second operand 7 states. [2020-10-12 19:29:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:58,723 INFO L93 Difference]: Finished difference Result 570 states and 853 transitions. [2020-10-12 19:29:58,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:29:58,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-12 19:29:58,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:58,727 INFO L225 Difference]: With dead ends: 570 [2020-10-12 19:29:58,727 INFO L226 Difference]: Without dead ends: 390 [2020-10-12 19:29:58,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:29:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-12 19:29:58,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 226. [2020-10-12 19:29:58,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-12 19:29:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 328 transitions. [2020-10-12 19:29:58,764 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 328 transitions. Word has length 44 [2020-10-12 19:29:58,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:58,764 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 328 transitions. [2020-10-12 19:29:58,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:29:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 328 transitions. [2020-10-12 19:29:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 19:29:58,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:58,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:58,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:29:58,766 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:58,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:58,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1881183488, now seen corresponding path program 1 times [2020-10-12 19:29:58,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:58,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793929893] [2020-10-12 19:29:58,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:58,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:58,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:58,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:58,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:59,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:59,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 19:29:59,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:29:59,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-12 19:29:59,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:59,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:29:59,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 19:29:59,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 19:29:59,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:29:59,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:59,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:59,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:59,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:59,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:59,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:29:59,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:59,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:59,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:59,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:29:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:29:59,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793929893] [2020-10-12 19:29:59,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:29:59,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:29:59,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002130471] [2020-10-12 19:29:59,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:29:59,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:29:59,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:29:59,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:29:59,162 INFO L87 Difference]: Start difference. First operand 226 states and 328 transitions. Second operand 4 states. [2020-10-12 19:29:59,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:29:59,552 INFO L93 Difference]: Finished difference Result 536 states and 798 transitions. [2020-10-12 19:29:59,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:29:59,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-12 19:29:59,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:29:59,557 INFO L225 Difference]: With dead ends: 536 [2020-10-12 19:29:59,557 INFO L226 Difference]: Without dead ends: 358 [2020-10-12 19:29:59,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:29:59,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-12 19:29:59,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 356. [2020-10-12 19:29:59,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-12 19:29:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 522 transitions. [2020-10-12 19:29:59,629 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 522 transitions. Word has length 44 [2020-10-12 19:29:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:29:59,630 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 522 transitions. [2020-10-12 19:29:59,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:29:59,630 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 522 transitions. [2020-10-12 19:29:59,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 19:29:59,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:29:59,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:29:59,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:29:59,632 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:29:59,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:29:59,632 INFO L82 PathProgramCache]: Analyzing trace with hash 557188954, now seen corresponding path program 1 times [2020-10-12 19:29:59,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:29:59,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269987643] [2020-10-12 19:29:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:29:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:59,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:59,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:59,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:59,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:59,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 19:29:59,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:29:59,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-12 19:29:59,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:59,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:29:59,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 19:29:59,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 19:29:59,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:29:59,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:29:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:29:59,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:29:59,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:29:59,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:29:59,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:29:59,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:29:59,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:29:59,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:29:59,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:29:59,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:29:59,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:00,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269987643] [2020-10-12 19:30:00,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:00,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:30:00,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061494475] [2020-10-12 19:30:00,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:30:00,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:00,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:30:00,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:30:00,009 INFO L87 Difference]: Start difference. First operand 356 states and 522 transitions. Second operand 4 states. [2020-10-12 19:30:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:00,411 INFO L93 Difference]: Finished difference Result 896 states and 1332 transitions. [2020-10-12 19:30:00,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:30:00,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-12 19:30:00,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:00,415 INFO L225 Difference]: With dead ends: 896 [2020-10-12 19:30:00,415 INFO L226 Difference]: Without dead ends: 592 [2020-10-12 19:30:00,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:30:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2020-10-12 19:30:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 568. [2020-10-12 19:30:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2020-10-12 19:30:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 835 transitions. [2020-10-12 19:30:00,506 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 835 transitions. Word has length 45 [2020-10-12 19:30:00,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:00,508 INFO L479 AbstractCegarLoop]: Abstraction has 568 states and 835 transitions. [2020-10-12 19:30:00,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:30:00,509 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 835 transitions. [2020-10-12 19:30:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 19:30:00,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:00,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:00,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:30:00,510 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:00,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:00,510 INFO L82 PathProgramCache]: Analyzing trace with hash 194903052, now seen corresponding path program 1 times [2020-10-12 19:30:00,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:00,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464775517] [2020-10-12 19:30:00,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:00,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:00,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:00,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:00,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:00,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 19:30:00,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:30:00,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-12 19:30:00,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:00,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:30:00,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:30:00,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 19:30:00,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:00,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:00,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:00,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:00,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:00,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:00,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:30:00,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:00,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:00,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:00,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:30:00,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:00,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464775517] [2020-10-12 19:30:00,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:00,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:30:00,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545855173] [2020-10-12 19:30:00,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:30:00,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:00,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:30:00,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:30:00,872 INFO L87 Difference]: Start difference. First operand 568 states and 835 transitions. Second operand 6 states. [2020-10-12 19:30:01,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:01,325 INFO L93 Difference]: Finished difference Result 1106 states and 1636 transitions. [2020-10-12 19:30:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:30:01,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-12 19:30:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:01,329 INFO L225 Difference]: With dead ends: 1106 [2020-10-12 19:30:01,329 INFO L226 Difference]: Without dead ends: 568 [2020-10-12 19:30:01,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:30:01,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-10-12 19:30:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2020-10-12 19:30:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2020-10-12 19:30:01,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 827 transitions. [2020-10-12 19:30:01,403 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 827 transitions. Word has length 46 [2020-10-12 19:30:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:01,404 INFO L479 AbstractCegarLoop]: Abstraction has 568 states and 827 transitions. [2020-10-12 19:30:01,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:30:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 827 transitions. [2020-10-12 19:30:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 19:30:01,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:01,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:01,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:30:01,405 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:01,406 INFO L82 PathProgramCache]: Analyzing trace with hash -334387449, now seen corresponding path program 1 times [2020-10-12 19:30:01,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:01,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918470285] [2020-10-12 19:30:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:01,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:01,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:01,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:01,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 19:30:01,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 19:30:01,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-12 19:30:01,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:01,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:01,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:30:01,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 19:30:01,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:01,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:01,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:01,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:01,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:01,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:01,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:30:01,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:01,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:30:01,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:01,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:30:01,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:01,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918470285] [2020-10-12 19:30:01,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:01,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:30:01,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729135517] [2020-10-12 19:30:01,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:30:01,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:01,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:30:01,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:30:01,672 INFO L87 Difference]: Start difference. First operand 568 states and 827 transitions. Second operand 4 states. [2020-10-12 19:30:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:02,118 INFO L93 Difference]: Finished difference Result 1324 states and 1931 transitions. [2020-10-12 19:30:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:30:02,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-12 19:30:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:02,123 INFO L225 Difference]: With dead ends: 1324 [2020-10-12 19:30:02,123 INFO L226 Difference]: Without dead ends: 782 [2020-10-12 19:30:02,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:30:02,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2020-10-12 19:30:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 772. [2020-10-12 19:30:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2020-10-12 19:30:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1102 transitions. [2020-10-12 19:30:02,226 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1102 transitions. Word has length 46 [2020-10-12 19:30:02,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:02,226 INFO L479 AbstractCegarLoop]: Abstraction has 772 states and 1102 transitions. [2020-10-12 19:30:02,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:30:02,226 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1102 transitions. [2020-10-12 19:30:02,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 19:30:02,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:02,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:02,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:30:02,228 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:02,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:02,228 INFO L82 PathProgramCache]: Analyzing trace with hash -315317978, now seen corresponding path program 1 times [2020-10-12 19:30:02,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:02,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982825708] [2020-10-12 19:30:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:02,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:02,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:02,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:02,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:02,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 19:30:02,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:30:02,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-12 19:30:02,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:02,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:30:02,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:30:02,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 19:30:02,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:02,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:02,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:02,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:02,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:02,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:02,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:30:02,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:02,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:30:02,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:02,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:30:02,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:02,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982825708] [2020-10-12 19:30:02,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:30:02,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:30:02,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418552995] [2020-10-12 19:30:02,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:30:02,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:02,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:30:02,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:30:02,586 INFO L87 Difference]: Start difference. First operand 772 states and 1102 transitions. Second operand 5 states. [2020-10-12 19:30:03,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:03,150 INFO L93 Difference]: Finished difference Result 1778 states and 2569 transitions. [2020-10-12 19:30:03,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:30:03,150 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-12 19:30:03,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:03,156 INFO L225 Difference]: With dead ends: 1778 [2020-10-12 19:30:03,157 INFO L226 Difference]: Without dead ends: 1240 [2020-10-12 19:30:03,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:30:03,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-10-12 19:30:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1220. [2020-10-12 19:30:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1220 states. [2020-10-12 19:30:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1718 transitions. [2020-10-12 19:30:03,330 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1718 transitions. Word has length 47 [2020-10-12 19:30:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:03,330 INFO L479 AbstractCegarLoop]: Abstraction has 1220 states and 1718 transitions. [2020-10-12 19:30:03,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:30:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1718 transitions. [2020-10-12 19:30:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:30:03,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:03,332 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:03,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:30:03,333 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:03,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:03,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1077276216, now seen corresponding path program 1 times [2020-10-12 19:30:03,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:03,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837046412] [2020-10-12 19:30:03,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:03,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:03,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:04,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:04,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:04,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:04,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:06,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:06,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:08,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:08,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:30:08,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 19:30:08,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:30:08,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:08,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 19:30:08,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:30:08,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 19:30:08,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:08,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:08,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:08,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:08,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:08,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:08,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:30:08,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:08,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:08,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:08,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:30:08,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:08,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837046412] [2020-10-12 19:30:08,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:30:08,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 19:30:08,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75781202] [2020-10-12 19:30:08,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 19:30:08,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:08,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 19:30:08,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:30:08,797 INFO L87 Difference]: Start difference. First operand 1220 states and 1718 transitions. Second operand 16 states. [2020-10-12 19:30:09,109 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 103 [2020-10-12 19:30:16,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:16,273 INFO L93 Difference]: Finished difference Result 10158 states and 14045 transitions. [2020-10-12 19:30:16,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-12 19:30:16,274 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-12 19:30:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:16,318 INFO L225 Difference]: With dead ends: 10158 [2020-10-12 19:30:16,319 INFO L226 Difference]: Without dead ends: 8968 [2020-10-12 19:30:16,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2843 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1567, Invalid=6989, Unknown=0, NotChecked=0, Total=8556 [2020-10-12 19:30:16,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8968 states. [2020-10-12 19:30:16,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8968 to 2316. [2020-10-12 19:30:16,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2316 states. [2020-10-12 19:30:16,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3255 transitions. [2020-10-12 19:30:16,766 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3255 transitions. Word has length 65 [2020-10-12 19:30:16,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:16,767 INFO L479 AbstractCegarLoop]: Abstraction has 2316 states and 3255 transitions. [2020-10-12 19:30:16,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 19:30:16,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3255 transitions. [2020-10-12 19:30:16,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:30:16,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:16,772 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:16,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:30:16,772 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:16,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:16,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1053530994, now seen corresponding path program 1 times [2020-10-12 19:30:16,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:16,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271472291] [2020-10-12 19:30:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:16,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:16,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:16,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:17,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:17,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:17,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:17,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:21,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:21,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:30:21,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:30:21,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:30:21,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:21,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:30:21,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:30:21,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:30:21,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:22,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:22,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:22,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:22,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:22,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:22,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:30:22,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:30:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:30:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:22,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271472291] [2020-10-12 19:30:22,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:30:22,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:30:22,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886098924] [2020-10-12 19:30:22,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:30:22,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:22,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:30:22,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:30:22,104 INFO L87 Difference]: Start difference. First operand 2316 states and 3255 transitions. Second operand 11 states. [2020-10-12 19:30:22,282 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-12 19:30:25,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:25,003 INFO L93 Difference]: Finished difference Result 12332 states and 17246 transitions. [2020-10-12 19:30:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 19:30:25,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-12 19:30:25,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:25,045 INFO L225 Difference]: With dead ends: 12332 [2020-10-12 19:30:25,045 INFO L226 Difference]: Without dead ends: 10046 [2020-10-12 19:30:25,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=348, Invalid=1058, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 19:30:25,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2020-10-12 19:30:25,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 3688. [2020-10-12 19:30:25,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3688 states. [2020-10-12 19:30:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 5133 transitions. [2020-10-12 19:30:25,806 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 5133 transitions. Word has length 65 [2020-10-12 19:30:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:25,806 INFO L479 AbstractCegarLoop]: Abstraction has 3688 states and 5133 transitions. [2020-10-12 19:30:25,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:30:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 5133 transitions. [2020-10-12 19:30:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:30:25,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:25,813 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:25,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:30:25,813 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:25,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:25,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1713838131, now seen corresponding path program 1 times [2020-10-12 19:30:25,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:25,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714500654] [2020-10-12 19:30:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:25,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:25,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:25,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:25,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:26,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:26,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:26,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:26,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:27,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:27,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:30,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:30,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:30:30,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:30:30,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:30:30,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:30,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 19:30:30,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:30:30,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:30:30,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:31,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:31,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:31,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:31,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:31,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:31,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:30:31,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:31,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:30:31,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:31,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:30:31,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:31,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714500654] [2020-10-12 19:30:31,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:30:31,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 19:30:31,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804837555] [2020-10-12 19:30:31,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 19:30:31,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:31,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 19:30:31,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:30:31,203 INFO L87 Difference]: Start difference. First operand 3688 states and 5133 transitions. Second operand 13 states. [2020-10-12 19:30:31,722 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 102 [2020-10-12 19:30:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:35,793 INFO L93 Difference]: Finished difference Result 17468 states and 24322 transitions. [2020-10-12 19:30:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 19:30:35,793 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-10-12 19:30:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:35,827 INFO L225 Difference]: With dead ends: 17468 [2020-10-12 19:30:35,828 INFO L226 Difference]: Without dead ends: 13810 [2020-10-12 19:30:35,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 19:30:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13810 states. [2020-10-12 19:30:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13810 to 6926. [2020-10-12 19:30:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6926 states. [2020-10-12 19:30:36,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6926 states to 6926 states and 9603 transitions. [2020-10-12 19:30:36,904 INFO L78 Accepts]: Start accepts. Automaton has 6926 states and 9603 transitions. Word has length 65 [2020-10-12 19:30:36,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:36,904 INFO L479 AbstractCegarLoop]: Abstraction has 6926 states and 9603 transitions. [2020-10-12 19:30:36,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 19:30:36,904 INFO L276 IsEmpty]: Start isEmpty. Operand 6926 states and 9603 transitions. [2020-10-12 19:30:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:30:36,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:36,908 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:36,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:30:36,909 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:36,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:36,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1353069239, now seen corresponding path program 1 times [2020-10-12 19:30:36,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:36,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995607387] [2020-10-12 19:30:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:36,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:36,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:36,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:37,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:41,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:41,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:30:41,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:30:41,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:30:41,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:41,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:30:41,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:30:41,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:30:41,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:42,102 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 23 [2020-10-12 19:30:42,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:42,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:42,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:42,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:42,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:42,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:30:42,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:42,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:30:42,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:42,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:30:42,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:42,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995607387] [2020-10-12 19:30:42,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:30:42,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:30:42,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614293705] [2020-10-12 19:30:42,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:30:42,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:42,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:30:42,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:30:42,253 INFO L87 Difference]: Start difference. First operand 6926 states and 9603 transitions. Second operand 11 states. [2020-10-12 19:30:47,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:47,945 INFO L93 Difference]: Finished difference Result 26898 states and 36927 transitions. [2020-10-12 19:30:47,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 19:30:47,946 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-10-12 19:30:47,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:47,992 INFO L225 Difference]: With dead ends: 26898 [2020-10-12 19:30:47,992 INFO L226 Difference]: Without dead ends: 20002 [2020-10-12 19:30:48,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 19:30:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20002 states. [2020-10-12 19:30:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20002 to 11260. [2020-10-12 19:30:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11260 states. [2020-10-12 19:30:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11260 states to 11260 states and 15710 transitions. [2020-10-12 19:30:49,744 INFO L78 Accepts]: Start accepts. Automaton has 11260 states and 15710 transitions. Word has length 66 [2020-10-12 19:30:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:49,744 INFO L479 AbstractCegarLoop]: Abstraction has 11260 states and 15710 transitions. [2020-10-12 19:30:49,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:30:49,744 INFO L276 IsEmpty]: Start isEmpty. Operand 11260 states and 15710 transitions. [2020-10-12 19:30:49,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:30:49,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:49,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:49,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:30:49,750 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:49,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:49,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1329324017, now seen corresponding path program 1 times [2020-10-12 19:30:49,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:49,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098398892] [2020-10-12 19:30:49,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:49,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:49,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:49,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:49,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:51,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:51,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:30:51,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:30:51,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1338 [2020-10-12 19:30:51,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:51,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:30:51,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:30:51,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:30:51,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:51,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:30:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:51,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:51,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:30:51,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:30:51,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:30:51,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:30:51,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:30:51,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:30:51,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:30:51,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:30:51,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:30:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:30:51,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098398892] [2020-10-12 19:30:51,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:30:51,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:30:51,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465047078] [2020-10-12 19:30:51,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:30:51,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:30:51,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:30:51,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:30:51,604 INFO L87 Difference]: Start difference. First operand 11260 states and 15710 transitions. Second operand 10 states. [2020-10-12 19:30:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:30:56,510 INFO L93 Difference]: Finished difference Result 29758 states and 41199 transitions. [2020-10-12 19:30:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:30:56,510 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-12 19:30:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:30:56,549 INFO L225 Difference]: With dead ends: 29758 [2020-10-12 19:30:56,549 INFO L226 Difference]: Without dead ends: 18528 [2020-10-12 19:30:56,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2020-10-12 19:30:56,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18528 states. [2020-10-12 19:30:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18528 to 11700. [2020-10-12 19:30:58,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11700 states. [2020-10-12 19:30:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11700 states to 11700 states and 16356 transitions. [2020-10-12 19:30:58,656 INFO L78 Accepts]: Start accepts. Automaton has 11700 states and 16356 transitions. Word has length 66 [2020-10-12 19:30:58,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:30:58,656 INFO L479 AbstractCegarLoop]: Abstraction has 11700 states and 16356 transitions. [2020-10-12 19:30:58,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:30:58,656 INFO L276 IsEmpty]: Start isEmpty. Operand 11700 states and 16356 transitions. [2020-10-12 19:30:58,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:30:58,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:30:58,661 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:30:58,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:30:58,661 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:30:58,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:30:58,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1989631154, now seen corresponding path program 1 times [2020-10-12 19:30:58,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:30:58,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440100330] [2020-10-12 19:30:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:30:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:30:58,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:58,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:58,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:58,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:58,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:59,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:30:59,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:00,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:00,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:31:00,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:31:00,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2289 [2020-10-12 19:31:00,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:00,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:31:00,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:31:00,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 19:31:00,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:01,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:01,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:01,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:01,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:01,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:01,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:31:01,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:01,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:31:01,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:01,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:31:01,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:01,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440100330] [2020-10-12 19:31:01,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:31:01,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:31:01,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236788535] [2020-10-12 19:31:01,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:31:01,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:01,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:31:01,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:31:01,152 INFO L87 Difference]: Start difference. First operand 11700 states and 16356 transitions. Second operand 8 states. [2020-10-12 19:31:05,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:05,560 INFO L93 Difference]: Finished difference Result 33508 states and 47303 transitions. [2020-10-12 19:31:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:31:05,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:31:05,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:05,600 INFO L225 Difference]: With dead ends: 33508 [2020-10-12 19:31:05,600 INFO L226 Difference]: Without dead ends: 21838 [2020-10-12 19:31:05,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:31:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21838 states. [2020-10-12 19:31:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21838 to 13002. [2020-10-12 19:31:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13002 states. [2020-10-12 19:31:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13002 states to 13002 states and 18078 transitions. [2020-10-12 19:31:07,801 INFO L78 Accepts]: Start accepts. Automaton has 13002 states and 18078 transitions. Word has length 66 [2020-10-12 19:31:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:07,801 INFO L479 AbstractCegarLoop]: Abstraction has 13002 states and 18078 transitions. [2020-10-12 19:31:07,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:31:07,802 INFO L276 IsEmpty]: Start isEmpty. Operand 13002 states and 18078 transitions. [2020-10-12 19:31:07,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:31:07,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:07,811 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:07,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:31:07,811 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:07,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:07,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1965885932, now seen corresponding path program 1 times [2020-10-12 19:31:07,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:07,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799875441] [2020-10-12 19:31:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:07,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:07,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:07,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:07,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:08,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:08,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:08,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:08,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:08,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:08,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:08,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:12,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:12,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:31:12,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:31:12,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:31:12,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:12,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:31:12,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:31:12,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:31:12,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:13,053 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2020-10-12 19:31:13,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:13,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:13,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:13,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:13,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:13,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:31:13,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:13,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:13,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799875441] [2020-10-12 19:31:13,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:31:13,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 19:31:13,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990940930] [2020-10-12 19:31:13,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:31:13,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:13,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:31:13,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:31:13,193 INFO L87 Difference]: Start difference. First operand 13002 states and 18078 transitions. Second operand 12 states. [2020-10-12 19:31:18,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:18,858 INFO L93 Difference]: Finished difference Result 31780 states and 44024 transitions. [2020-10-12 19:31:18,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 19:31:18,858 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-10-12 19:31:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:18,888 INFO L225 Difference]: With dead ends: 31780 [2020-10-12 19:31:18,889 INFO L226 Difference]: Without dead ends: 18808 [2020-10-12 19:31:18,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=436, Invalid=1286, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 19:31:18,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18808 states. [2020-10-12 19:31:21,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18808 to 12284. [2020-10-12 19:31:21,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12284 states. [2020-10-12 19:31:21,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12284 states to 12284 states and 17012 transitions. [2020-10-12 19:31:21,417 INFO L78 Accepts]: Start accepts. Automaton has 12284 states and 17012 transitions. Word has length 66 [2020-10-12 19:31:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:21,417 INFO L479 AbstractCegarLoop]: Abstraction has 12284 states and 17012 transitions. [2020-10-12 19:31:21,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:31:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 12284 states and 17012 transitions. [2020-10-12 19:31:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:31:21,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:21,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:21,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:31:21,421 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:21,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:21,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1742197833, now seen corresponding path program 1 times [2020-10-12 19:31:21,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:21,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400790160] [2020-10-12 19:31:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:21,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:21,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:21,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:21,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:21,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:22,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:22,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:31:22,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:31:22,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1229 [2020-10-12 19:31:22,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:22,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:31:22,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:31:22,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:31:22,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:22,842 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 25 [2020-10-12 19:31:22,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:22,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:22,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:22,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:22,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:22,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 19:31:22,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:22,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:22,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:22,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:22,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:22,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400790160] [2020-10-12 19:31:22,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:31:22,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:31:22,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914916364] [2020-10-12 19:31:22,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:31:22,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:22,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:31:22,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:31:22,960 INFO L87 Difference]: Start difference. First operand 12284 states and 17012 transitions. Second operand 10 states. [2020-10-12 19:31:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:28,082 INFO L93 Difference]: Finished difference Result 31580 states and 43641 transitions. [2020-10-12 19:31:28,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:31:28,082 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-12 19:31:28,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:28,105 INFO L225 Difference]: With dead ends: 31580 [2020-10-12 19:31:28,105 INFO L226 Difference]: Without dead ends: 19326 [2020-10-12 19:31:28,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2020-10-12 19:31:28,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19326 states. [2020-10-12 19:31:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19326 to 12274. [2020-10-12 19:31:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12274 states. [2020-10-12 19:31:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12274 states to 12274 states and 16978 transitions. [2020-10-12 19:31:30,247 INFO L78 Accepts]: Start accepts. Automaton has 12274 states and 16978 transitions. Word has length 66 [2020-10-12 19:31:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:30,247 INFO L479 AbstractCegarLoop]: Abstraction has 12274 states and 16978 transitions. [2020-10-12 19:31:30,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:31:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 12274 states and 16978 transitions. [2020-10-12 19:31:30,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:31:30,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:30,251 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:30,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:31:30,251 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:30,252 INFO L82 PathProgramCache]: Analyzing trace with hash -823995686, now seen corresponding path program 1 times [2020-10-12 19:31:30,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:30,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476356822] [2020-10-12 19:31:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:30,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:30,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:30,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:30,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:30,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:30,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:30,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:35,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:35,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:31:35,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:31:35,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:31:35,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:35,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:31:35,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:31:35,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 19:31:35,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:35,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:35,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:35,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:35,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:35,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:35,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:31:35,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:35,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:31:35,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:35,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:31:35,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:35,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476356822] [2020-10-12 19:31:35,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:31:35,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:31:35,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253047535] [2020-10-12 19:31:35,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:31:35,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:35,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:31:35,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:31:35,489 INFO L87 Difference]: Start difference. First operand 12274 states and 16978 transitions. Second operand 11 states. [2020-10-12 19:31:35,684 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-12 19:31:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:39,670 INFO L93 Difference]: Finished difference Result 25620 states and 35140 transitions. [2020-10-12 19:31:39,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 19:31:39,670 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-12 19:31:39,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:39,686 INFO L225 Difference]: With dead ends: 25620 [2020-10-12 19:31:39,687 INFO L226 Difference]: Without dead ends: 13376 [2020-10-12 19:31:39,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=297, Invalid=825, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 19:31:39,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13376 states. [2020-10-12 19:31:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13376 to 8098. [2020-10-12 19:31:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8098 states. [2020-10-12 19:31:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8098 states to 8098 states and 11076 transitions. [2020-10-12 19:31:41,207 INFO L78 Accepts]: Start accepts. Automaton has 8098 states and 11076 transitions. Word has length 67 [2020-10-12 19:31:41,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:41,207 INFO L479 AbstractCegarLoop]: Abstraction has 8098 states and 11076 transitions. [2020-10-12 19:31:41,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:31:41,207 INFO L276 IsEmpty]: Start isEmpty. Operand 8098 states and 11076 transitions. [2020-10-12 19:31:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:31:41,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:41,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:41,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 19:31:41,210 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:41,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1003959671, now seen corresponding path program 1 times [2020-10-12 19:31:41,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:41,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805966960] [2020-10-12 19:31:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:41,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:41,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:41,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:41,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:41,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:41,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:43,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:43,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:31:43,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:31:43,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2153 [2020-10-12 19:31:43,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:43,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:31:43,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:31:43,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:31:43,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:43,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:43,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:43,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:43,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:43,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:43,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:31:43,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:31:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:31:43,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:43,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805966960] [2020-10-12 19:31:43,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:31:43,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:31:43,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102686051] [2020-10-12 19:31:43,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:31:43,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:43,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:31:43,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:31:43,643 INFO L87 Difference]: Start difference. First operand 8098 states and 11076 transitions. Second operand 10 states. [2020-10-12 19:31:51,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:31:51,832 INFO L93 Difference]: Finished difference Result 41386 states and 56222 transitions. [2020-10-12 19:31:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 19:31:51,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-10-12 19:31:51,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:31:51,887 INFO L225 Difference]: With dead ends: 41386 [2020-10-12 19:31:51,888 INFO L226 Difference]: Without dead ends: 36119 [2020-10-12 19:31:51,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2020-10-12 19:31:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36119 states. [2020-10-12 19:31:55,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36119 to 17957. [2020-10-12 19:31:55,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17957 states. [2020-10-12 19:31:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17957 states to 17957 states and 24597 transitions. [2020-10-12 19:31:55,360 INFO L78 Accepts]: Start accepts. Automaton has 17957 states and 24597 transitions. Word has length 68 [2020-10-12 19:31:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:31:55,360 INFO L479 AbstractCegarLoop]: Abstraction has 17957 states and 24597 transitions. [2020-10-12 19:31:55,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:31:55,360 INFO L276 IsEmpty]: Start isEmpty. Operand 17957 states and 24597 transitions. [2020-10-12 19:31:55,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:31:55,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:31:55,363 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:31:55,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 19:31:55,364 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:31:55,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:31:55,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1127459205, now seen corresponding path program 1 times [2020-10-12 19:31:55,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:31:55,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809295136] [2020-10-12 19:31:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:31:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:55,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:55,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:55,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:55,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:55,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:55,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:56,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:56,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:59,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:59,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:31:59,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:31:59,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4353 [2020-10-12 19:31:59,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:59,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:31:59,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:31:59,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:31:59,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:59,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:31:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:31:59,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:31:59,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:31:59,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:31:59,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:31:59,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:31:59,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:31:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:31:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:31:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:31:59,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:31:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:31:59,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809295136] [2020-10-12 19:31:59,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:31:59,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 19:31:59,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095358224] [2020-10-12 19:31:59,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:31:59,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:31:59,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:31:59,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:31:59,966 INFO L87 Difference]: Start difference. First operand 17957 states and 24597 transitions. Second operand 10 states. [2020-10-12 19:32:08,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:08,177 INFO L93 Difference]: Finished difference Result 47279 states and 64844 transitions. [2020-10-12 19:32:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 19:32:08,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-12 19:32:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:08,213 INFO L225 Difference]: With dead ends: 47279 [2020-10-12 19:32:08,213 INFO L226 Difference]: Without dead ends: 35434 [2020-10-12 19:32:08,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-10-12 19:32:08,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35434 states. [2020-10-12 19:32:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35434 to 17950. [2020-10-12 19:32:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17950 states. [2020-10-12 19:32:11,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17950 states to 17950 states and 24371 transitions. [2020-10-12 19:32:11,965 INFO L78 Accepts]: Start accepts. Automaton has 17950 states and 24371 transitions. Word has length 69 [2020-10-12 19:32:11,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:11,965 INFO L479 AbstractCegarLoop]: Abstraction has 17950 states and 24371 transitions. [2020-10-12 19:32:11,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:32:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 17950 states and 24371 transitions. [2020-10-12 19:32:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:32:11,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:11,967 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:32:11,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 19:32:11,967 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:11,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:11,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1687940355, now seen corresponding path program 1 times [2020-10-12 19:32:11,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:11,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298114371] [2020-10-12 19:32:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:11,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:11,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:12,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:12,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:12,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:12,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:12,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:13,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:15,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:15,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:32:15,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:32:15,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3255 [2020-10-12 19:32:15,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:15,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:32:15,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:32:15,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:32:15,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:15,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:15,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:15,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:15,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:15,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:15,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:32:15,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:15,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:32:15,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:15,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:32:15,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:32:15,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298114371] [2020-10-12 19:32:15,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:32:15,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:32:15,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757103329] [2020-10-12 19:32:15,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:32:15,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:15,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:32:15,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:32:15,478 INFO L87 Difference]: Start difference. First operand 17950 states and 24371 transitions. Second operand 11 states. [2020-10-12 19:32:25,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:25,594 INFO L93 Difference]: Finished difference Result 50151 states and 67849 transitions. [2020-10-12 19:32:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 19:32:25,595 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-10-12 19:32:25,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:25,636 INFO L225 Difference]: With dead ends: 50151 [2020-10-12 19:32:25,637 INFO L226 Difference]: Without dead ends: 38473 [2020-10-12 19:32:25,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 19:32:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38473 states. [2020-10-12 19:32:29,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38473 to 19599. [2020-10-12 19:32:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19599 states. [2020-10-12 19:32:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19599 states to 19599 states and 26562 transitions. [2020-10-12 19:32:29,845 INFO L78 Accepts]: Start accepts. Automaton has 19599 states and 26562 transitions. Word has length 69 [2020-10-12 19:32:29,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:29,845 INFO L479 AbstractCegarLoop]: Abstraction has 19599 states and 26562 transitions. [2020-10-12 19:32:29,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:32:29,845 INFO L276 IsEmpty]: Start isEmpty. Operand 19599 states and 26562 transitions. [2020-10-12 19:32:29,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:32:29,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:29,847 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:32:29,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 19:32:29,847 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:29,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:29,848 INFO L82 PathProgramCache]: Analyzing trace with hash 957551225, now seen corresponding path program 1 times [2020-10-12 19:32:29,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:29,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736069880] [2020-10-12 19:32:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:29,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:29,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:29,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:29,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:30,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:30,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:31,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:31,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:32:31,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:32:31,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1452 [2020-10-12 19:32:31,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:31,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:32:31,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:32:31,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 19:32:31,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:31,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:31,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:31,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:31,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:31,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:31,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:32:31,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:31,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:32:31,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:31,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:32:31,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:32:31,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736069880] [2020-10-12 19:32:31,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:32:31,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 19:32:31,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969185286] [2020-10-12 19:32:31,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:32:31,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:31,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:32:31,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:32:31,436 INFO L87 Difference]: Start difference. First operand 19599 states and 26562 transitions. Second operand 6 states. [2020-10-12 19:32:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:37,882 INFO L93 Difference]: Finished difference Result 39393 states and 54302 transitions. [2020-10-12 19:32:37,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:32:37,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 19:32:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:37,913 INFO L225 Difference]: With dead ends: 39393 [2020-10-12 19:32:37,913 INFO L226 Difference]: Without dead ends: 28787 [2020-10-12 19:32:37,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:32:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28787 states. [2020-10-12 19:32:43,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28787 to 28433. [2020-10-12 19:32:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28433 states. [2020-10-12 19:32:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28433 states to 28433 states and 38108 transitions. [2020-10-12 19:32:44,000 INFO L78 Accepts]: Start accepts. Automaton has 28433 states and 38108 transitions. Word has length 70 [2020-10-12 19:32:44,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:44,000 INFO L479 AbstractCegarLoop]: Abstraction has 28433 states and 38108 transitions. [2020-10-12 19:32:44,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:32:44,000 INFO L276 IsEmpty]: Start isEmpty. Operand 28433 states and 38108 transitions. [2020-10-12 19:32:44,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 19:32:44,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:44,006 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:32:44,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 19:32:44,006 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:44,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:44,007 INFO L82 PathProgramCache]: Analyzing trace with hash 594651595, now seen corresponding path program 2 times [2020-10-12 19:32:44,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:44,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832176955] [2020-10-12 19:32:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:44,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:44,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:44,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:44,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:44,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:44,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:44,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:44,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:44,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:44,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:49,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:49,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 19:32:49,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:32:49,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:32:49,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:49,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:32:49,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 19:32:49,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 19:32:49,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:49,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:49,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:49,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:49,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:49,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:49,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:32:49,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:49,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:32:49,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:49,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:32:49,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:32:49,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832176955] [2020-10-12 19:32:49,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:32:49,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 19:32:49,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930405483] [2020-10-12 19:32:49,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:32:49,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:49,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:32:49,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:32:49,153 INFO L87 Difference]: Start difference. First operand 28433 states and 38108 transitions. Second operand 8 states. [2020-10-12 19:32:58,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:58,000 INFO L93 Difference]: Finished difference Result 65266 states and 87308 transitions. [2020-10-12 19:32:58,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:32:58,001 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 88 [2020-10-12 19:32:58,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:58,040 INFO L225 Difference]: With dead ends: 65266 [2020-10-12 19:32:58,040 INFO L226 Difference]: Without dead ends: 36856 [2020-10-12 19:32:58,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:32:58,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36856 states. [2020-10-12 19:33:04,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36856 to 28012. [2020-10-12 19:33:04,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28012 states. [2020-10-12 19:33:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28012 states to 28012 states and 37542 transitions. [2020-10-12 19:33:04,192 INFO L78 Accepts]: Start accepts. Automaton has 28012 states and 37542 transitions. Word has length 88 [2020-10-12 19:33:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:04,192 INFO L479 AbstractCegarLoop]: Abstraction has 28012 states and 37542 transitions. [2020-10-12 19:33:04,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:33:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 28012 states and 37542 transitions. [2020-10-12 19:33:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 19:33:04,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:04,198 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:04,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 19:33:04,198 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:04,199 INFO L82 PathProgramCache]: Analyzing trace with hash -978859049, now seen corresponding path program 1 times [2020-10-12 19:33:04,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:04,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66621404] [2020-10-12 19:33:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:04,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:06,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:06,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:06,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:06,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:09,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:09,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 19:33:09,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 19:33:09,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:33:09,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:09,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:33:09,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:33:09,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 19:33:09,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:09,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:09,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:09,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:09,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:09,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:09,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:33:09,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:09,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:33:09,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:09,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:33:09,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:09,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66621404] [2020-10-12 19:33:09,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:33:09,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:33:09,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446249552] [2020-10-12 19:33:09,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:33:09,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:09,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:33:09,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:33:09,416 INFO L87 Difference]: Start difference. First operand 28012 states and 37542 transitions. Second operand 11 states. [2020-10-12 19:33:20,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:20,619 INFO L93 Difference]: Finished difference Result 57971 states and 77382 transitions. [2020-10-12 19:33:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:33:20,620 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 90 [2020-10-12 19:33:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:20,663 INFO L225 Difference]: With dead ends: 57971 [2020-10-12 19:33:20,663 INFO L226 Difference]: Without dead ends: 42089 [2020-10-12 19:33:20,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2020-10-12 19:33:20,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42089 states. [2020-10-12 19:33:26,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42089 to 28048. [2020-10-12 19:33:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28048 states. [2020-10-12 19:33:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28048 states to 28048 states and 37612 transitions. [2020-10-12 19:33:26,847 INFO L78 Accepts]: Start accepts. Automaton has 28048 states and 37612 transitions. Word has length 90 [2020-10-12 19:33:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:26,847 INFO L479 AbstractCegarLoop]: Abstraction has 28048 states and 37612 transitions. [2020-10-12 19:33:26,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:33:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 28048 states and 37612 transitions. [2020-10-12 19:33:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 19:33:26,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:26,853 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:26,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 19:33:26,853 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:26,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1045745037, now seen corresponding path program 1 times [2020-10-12 19:33:26,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:26,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42224388] [2020-10-12 19:33:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:26,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:26,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:26,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:26,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:26,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:27,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:27,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:27,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:27,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:27,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:27,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:28,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:31,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:31,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 19:33:31,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 19:33:31,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:33:31,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:31,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 19:33:31,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:33:31,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 19:33:31,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:32,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:32,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:32,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:32,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:32,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:32,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:33:32,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:32,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:33:32,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:32,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:33:32,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:32,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42224388] [2020-10-12 19:33:32,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:33:32,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 19:33:32,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699699560] [2020-10-12 19:33:32,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 19:33:32,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 19:33:32,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:33:32,121 INFO L87 Difference]: Start difference. First operand 28048 states and 37612 transitions. Second operand 13 states.