/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/array-examples/standard_init3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:55:19,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:55:19,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:55:19,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:55:19,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:55:19,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:55:19,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:55:19,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:55:19,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:55:19,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:55:19,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:55:19,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:55:19,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:55:19,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:55:19,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:55:19,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:55:19,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:55:19,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:55:19,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:55:19,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:55:19,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:55:19,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:55:19,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:55:19,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:55:19,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:55:19,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:55:19,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:55:19,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:55:19,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:55:19,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:55:19,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:55:19,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:55:19,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:55:19,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:55:19,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:55:19,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:55:19,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:55:19,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:55:19,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:55:19,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:55:19,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:55:19,784 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 09:55:19,805 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:55:19,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:55:19,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:55:19,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:55:19,807 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:55:19,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:55:19,808 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:55:19,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:55:19,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:55:19,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:55:19,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:55:19,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:55:19,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:55:19,809 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:55:19,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:55:19,809 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:55:19,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:55:19,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:55:19,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:55:19,810 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:55:19,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:55:19,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:55:19,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:55:19,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:55:19,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:55:19,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:55:19,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:55:19,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:55:19,812 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:55:19,812 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 09:55:20,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:55:20,126 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:55:20,129 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:55:20,130 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:55:20,130 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:55:20,131 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2020-10-12 09:55:20,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be36a6b9a/5bb873bf8e624b9e8e75cc8a055bcccf/FLAGa8067493e [2020-10-12 09:55:20,621 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:55:20,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2020-10-12 09:55:20,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be36a6b9a/5bb873bf8e624b9e8e75cc8a055bcccf/FLAGa8067493e [2020-10-12 09:55:21,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be36a6b9a/5bb873bf8e624b9e8e75cc8a055bcccf [2020-10-12 09:55:21,032 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:55:21,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:55:21,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:55:21,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:55:21,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:55:21,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:55:21" (1/1) ... [2020-10-12 09:55:21,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634162df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:21, skipping insertion in model container [2020-10-12 09:55:21,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:55:21" (1/1) ... [2020-10-12 09:55:21,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:55:21,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:55:21,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:55:21,291 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:55:21,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:55:21,327 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:55:21,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:21 WrapperNode [2020-10-12 09:55:21,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:55:21,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:55:21,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:55:21,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:55:21,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:21" (1/1) ... [2020-10-12 09:55:21,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:21" (1/1) ... [2020-10-12 09:55:21,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:21" (1/1) ... [2020-10-12 09:55:21,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:21" (1/1) ... [2020-10-12 09:55:21,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:21" (1/1) ... [2020-10-12 09:55:21,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:21" (1/1) ... [2020-10-12 09:55:21,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:21" (1/1) ... [2020-10-12 09:55:21,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:55:21,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:55:21,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:55:21,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:55:21,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:21" (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 09:55:21,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:55:21,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:55:21,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:55:21,507 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:55:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:55:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:55:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:55:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:55:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:55:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:55:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:55:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:55:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:55:21,708 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:55:21,708 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-12 09:55:21,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:55:21 BoogieIcfgContainer [2020-10-12 09:55:21,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:55:21,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:55:21,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:55:21,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:55:21,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:55:21" (1/3) ... [2020-10-12 09:55:21,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c568102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:55:21, skipping insertion in model container [2020-10-12 09:55:21,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:21" (2/3) ... [2020-10-12 09:55:21,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c568102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:55:21, skipping insertion in model container [2020-10-12 09:55:21,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:55:21" (3/3) ... [2020-10-12 09:55:21,720 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-1.i [2020-10-12 09:55:21,730 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:55:21,737 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:55:21,750 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:55:21,772 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:55:21,772 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:55:21,772 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:55:21,772 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:55:21,772 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:55:21,772 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:55:21,772 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:55:21,773 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:55:21,787 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-12 09:55:21,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 09:55:21,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:21,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:21,794 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:21,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:21,799 INFO L82 PathProgramCache]: Analyzing trace with hash 578824766, now seen corresponding path program 1 times [2020-10-12 09:55:21,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:21,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771805556] [2020-10-12 09:55:21,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:21,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:22,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 09:55:22,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:22,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-12 09:55:22,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:22,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:55:22,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:55:22,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:55:22,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 09:55:22,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:22,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:22,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:22,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:22,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:55:22,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:22,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:22,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:22,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:22,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:22,342 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 09:55:22,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771805556] [2020-10-12 09:55:22,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:55:22,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:55:22,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823279144] [2020-10-12 09:55:22,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:55:22,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:22,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:55:22,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:55:22,370 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 4 states. [2020-10-12 09:55:22,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:22,583 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2020-10-12 09:55:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:55:22,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-12 09:55:22,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:22,593 INFO L225 Difference]: With dead ends: 50 [2020-10-12 09:55:22,594 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 09:55:22,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:55:22,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 09:55:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-12 09:55:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 09:55:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-12 09:55:22,631 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-12 09:55:22,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:22,631 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-12 09:55:22,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:55:22,632 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-12 09:55:22,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 09:55:22,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:22,633 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] [2020-10-12 09:55:22,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:55:22,634 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:22,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:22,634 INFO L82 PathProgramCache]: Analyzing trace with hash 3753729, now seen corresponding path program 1 times [2020-10-12 09:55:22,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:22,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478851561] [2020-10-12 09:55:22,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:22,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:23,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:23,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:23,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 09:55:23,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:23,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-10-12 09:55:23,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:23,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:55:23,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:55:23,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:55:23,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:23,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:23,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:23,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:23,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:23,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:23,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:23,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:23,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:55:23,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478851561] [2020-10-12 09:55:23,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:23,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:55:23,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008169185] [2020-10-12 09:55:23,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:55:23,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:23,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:55:23,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:55:23,517 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 10 states. [2020-10-12 09:55:23,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:23,799 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-12 09:55:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:55:23,800 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-12 09:55:23,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:23,806 INFO L225 Difference]: With dead ends: 44 [2020-10-12 09:55:23,806 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 09:55:23,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:55:23,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 09:55:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-10-12 09:55:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 09:55:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-12 09:55:23,838 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2020-10-12 09:55:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:23,839 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-12 09:55:23,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:55:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-12 09:55:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 09:55:23,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:23,842 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:23,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:55:23,842 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:23,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1974713063, now seen corresponding path program 2 times [2020-10-12 09:55:23,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:23,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026909943] [2020-10-12 09:55:23,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:23,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:23,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:23,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:24,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:24,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:24,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 09:55:24,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:24,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-12 09:55:24,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:24,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:55:24,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:55:24,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:55:24,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:24,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:24,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:24,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:24,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:24,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:24,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:24,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:24,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:24,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:24,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:24,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:55:24,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026909943] [2020-10-12 09:55:24,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:24,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:55:24,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036137365] [2020-10-12 09:55:24,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:55:24,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:24,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:55:24,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:55:24,616 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 11 states. [2020-10-12 09:55:24,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:24,866 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-12 09:55:24,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:55:24,866 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-12 09:55:24,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:24,869 INFO L225 Difference]: With dead ends: 53 [2020-10-12 09:55:24,870 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 09:55:24,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:55:24,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 09:55:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2020-10-12 09:55:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 09:55:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-12 09:55:24,879 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 21 [2020-10-12 09:55:24,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:24,879 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-12 09:55:24,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:55:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-12 09:55:24,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 09:55:24,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:24,881 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:24,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:55:24,881 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:24,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1117325825, now seen corresponding path program 3 times [2020-10-12 09:55:24,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:24,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886979960] [2020-10-12 09:55:24,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:24,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:24,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:24,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:25,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:25,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:25,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 09:55:25,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:25,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 680 [2020-10-12 09:55:25,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:25,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:55:25,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:55:25,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 09:55:25,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:25,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:25,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:25,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:25,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:25,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:25,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:25,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:25,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:25,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:25,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:25,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:55:25,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886979960] [2020-10-12 09:55:25,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:25,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:55:25,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341128554] [2020-10-12 09:55:25,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:55:25,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:25,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:55:25,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:55:25,733 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 12 states. [2020-10-12 09:55:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:26,013 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2020-10-12 09:55:26,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:55:26,014 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-10-12 09:55:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:26,015 INFO L225 Difference]: With dead ends: 55 [2020-10-12 09:55:26,015 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 09:55:26,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:55:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 09:55:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2020-10-12 09:55:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 09:55:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-12 09:55:26,023 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 22 [2020-10-12 09:55:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:26,024 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-12 09:55:26,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:55:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-12 09:55:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 09:55:26,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:26,025 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:26,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:55:26,026 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:26,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:26,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1813716455, now seen corresponding path program 4 times [2020-10-12 09:55:26,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:26,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132302107] [2020-10-12 09:55:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:26,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:26,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 09:55:26,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:26,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-12 09:55:26,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:26,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:55:26,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:55:26,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:55:26,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:26,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:27,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:27,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:27,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:27,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:27,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:55:27,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:27,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:27,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:55:27,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132302107] [2020-10-12 09:55:27,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:27,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:55:27,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242607990] [2020-10-12 09:55:27,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:55:27,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:27,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:55:27,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:55:27,016 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 13 states. [2020-10-12 09:55:27,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:27,436 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-12 09:55:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:55:27,437 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-10-12 09:55:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:27,440 INFO L225 Difference]: With dead ends: 57 [2020-10-12 09:55:27,440 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 09:55:27,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:55:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 09:55:27,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2020-10-12 09:55:27,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 09:55:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-12 09:55:27,460 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2020-10-12 09:55:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:27,461 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-12 09:55:27,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:55:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-12 09:55:27,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 09:55:27,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:27,463 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:27,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:55:27,464 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:27,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:27,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1813253377, now seen corresponding path program 5 times [2020-10-12 09:55:27,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:27,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19349620] [2020-10-12 09:55:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:27,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:27,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:27,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:27,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:28,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:28,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 09:55:28,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:28,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 994 [2020-10-12 09:55:28,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:28,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:55:28,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:55:28,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 09:55:28,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:28,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:28,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:28,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:28,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:28,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:28,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:28,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:28,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:28,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:28,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:28,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:55:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:55:28,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19349620] [2020-10-12 09:55:28,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:28,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:55:28,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268708355] [2020-10-12 09:55:28,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:55:28,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:28,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:55:28,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:55:28,727 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 14 states. [2020-10-12 09:55:29,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:29,002 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-10-12 09:55:29,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:55:29,003 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-12 09:55:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:29,004 INFO L225 Difference]: With dead ends: 59 [2020-10-12 09:55:29,004 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 09:55:29,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:55:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 09:55:29,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 37. [2020-10-12 09:55:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 09:55:29,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-12 09:55:29,011 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 24 [2020-10-12 09:55:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:29,011 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-12 09:55:29,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:55:29,012 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-12 09:55:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 09:55:29,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:29,013 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:29,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:55:29,014 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:29,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:29,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1714798823, now seen corresponding path program 6 times [2020-10-12 09:55:29,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:29,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954154738] [2020-10-12 09:55:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:29,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:29,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:29,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:29,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:29,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:29,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 09:55:29,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:29,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-12 09:55:29,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:29,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:55:29,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:55:29,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:55:29,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:30,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:30,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:30,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:30,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:30,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:30,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:30,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:30,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:30,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:30,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:30,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:55:30,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954154738] [2020-10-12 09:55:30,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:30,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:55:30,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980981361] [2020-10-12 09:55:30,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:55:30,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:30,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:55:30,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:55:30,116 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 15 states. [2020-10-12 09:55:30,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:30,412 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-12 09:55:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:55:30,413 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-10-12 09:55:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:30,414 INFO L225 Difference]: With dead ends: 61 [2020-10-12 09:55:30,414 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 09:55:30,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:55:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 09:55:30,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2020-10-12 09:55:30,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 09:55:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-10-12 09:55:30,421 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 25 [2020-10-12 09:55:30,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:30,422 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-10-12 09:55:30,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:55:30,422 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-10-12 09:55:30,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 09:55:30,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:30,423 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:30,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:55:30,423 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:30,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:30,424 INFO L82 PathProgramCache]: Analyzing trace with hash 584732673, now seen corresponding path program 7 times [2020-10-12 09:55:30,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:30,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847347998] [2020-10-12 09:55:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:30,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:30,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:30,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:30,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:31,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:31,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 09:55:31,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:31,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1161 [2020-10-12 09:55:31,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:31,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:55:31,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:55:31,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 09:55:31,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:31,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:31,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:31,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:31,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:31,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:31,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:31,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:31,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:31,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:31,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:31,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:55:31,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847347998] [2020-10-12 09:55:31,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:31,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:55:31,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648763092] [2020-10-12 09:55:31,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:55:31,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:31,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:55:31,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:55:31,877 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 16 states. [2020-10-12 09:55:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:32,180 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2020-10-12 09:55:32,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:55:32,180 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-10-12 09:55:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:32,181 INFO L225 Difference]: With dead ends: 63 [2020-10-12 09:55:32,182 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 09:55:32,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:55:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 09:55:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2020-10-12 09:55:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 09:55:32,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-10-12 09:55:32,188 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 26 [2020-10-12 09:55:32,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:32,189 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-10-12 09:55:32,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:55:32,189 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-10-12 09:55:32,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 09:55:32,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:32,190 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 09:55:32,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:55:32,190 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:32,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:32,191 INFO L82 PathProgramCache]: Analyzing trace with hash 583556280, now seen corresponding path program 1 times [2020-10-12 09:55:32,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:32,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956103254] [2020-10-12 09:55:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:32,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:32,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 09:55:32,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:32,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 800 [2020-10-12 09:55:32,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:55:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:55:32,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:33,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:33,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:33,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:33,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:33,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:33,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:33,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:33,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:33,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:33,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:33,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-12 09:55:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:33,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:33,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:33,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:33,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:33,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:55:33,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:33,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:33,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:33,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:33,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:33,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956103254] [2020-10-12 09:55:33,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:33,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:55:33,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364757975] [2020-10-12 09:55:33,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:55:33,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:33,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:55:33,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:55:33,201 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 11 states. [2020-10-12 09:55:33,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:33,567 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2020-10-12 09:55:33,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:55:33,567 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-12 09:55:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:33,568 INFO L225 Difference]: With dead ends: 69 [2020-10-12 09:55:33,568 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 09:55:33,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:55:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 09:55:33,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-12 09:55:33,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 09:55:33,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2020-10-12 09:55:33,582 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 28 [2020-10-12 09:55:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:33,583 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2020-10-12 09:55:33,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:55:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2020-10-12 09:55:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:55:33,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:33,585 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:33,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:55:33,585 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:33,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1144234983, now seen corresponding path program 8 times [2020-10-12 09:55:33,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:33,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153226493] [2020-10-12 09:55:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:33,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:33,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:33,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:34,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:34,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:34,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 09:55:34,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:34,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1152 [2020-10-12 09:55:34,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:34,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:55:34,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:55:34,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:55:34,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:34,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:34,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:34,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:34,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:34,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:34,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:34,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:34,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:34,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:34,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:34,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:55:34,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153226493] [2020-10-12 09:55:34,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:34,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:55:34,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151844105] [2020-10-12 09:55:34,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:55:34,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:34,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:55:34,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:55:34,999 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 17 states. [2020-10-12 09:55:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:35,323 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-10-12 09:55:35,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:55:35,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-10-12 09:55:35,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:35,325 INFO L225 Difference]: With dead ends: 83 [2020-10-12 09:55:35,325 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 09:55:35,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:55:35,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 09:55:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2020-10-12 09:55:35,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 09:55:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2020-10-12 09:55:35,339 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2020-10-12 09:55:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:35,339 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2020-10-12 09:55:35,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:55:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2020-10-12 09:55:35,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 09:55:35,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:35,343 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:35,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:55:35,343 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:35,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1092342529, now seen corresponding path program 9 times [2020-10-12 09:55:35,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:35,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147231589] [2020-10-12 09:55:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:35,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:35,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:35,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:36,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:36,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:36,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 09:55:36,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:36,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-12 09:55:36,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:55:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:55:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 09:55:36,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:37,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:37,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:37,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:37,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:37,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:37,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:37,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:37,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:37,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:37,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:55:37,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147231589] [2020-10-12 09:55:37,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:37,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:55:37,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378045700] [2020-10-12 09:55:37,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:55:37,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:37,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:55:37,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:55:37,044 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 18 states. [2020-10-12 09:55:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:37,362 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2020-10-12 09:55:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:55:37,362 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-10-12 09:55:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:37,363 INFO L225 Difference]: With dead ends: 86 [2020-10-12 09:55:37,364 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 09:55:37,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:55:37,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 09:55:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2020-10-12 09:55:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 09:55:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-10-12 09:55:37,381 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 28 [2020-10-12 09:55:37,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:37,382 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-10-12 09:55:37,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:55:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-10-12 09:55:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 09:55:37,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:37,386 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 09:55:37,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:55:37,386 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:37,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1901620111, now seen corresponding path program 2 times [2020-10-12 09:55:37,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:37,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784194331] [2020-10-12 09:55:37,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:37,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:38,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 09:55:38,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:55:38,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1170 [2020-10-12 09:55:38,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:38,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:55:38,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:55:38,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:55:38,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:38,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:38,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:38,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:38,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:38,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:38,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:38,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:38,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:38,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:38,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:38,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 09:55:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:38,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:38,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:38,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:38,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:38,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:38,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:55:38,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:38,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:38,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:55:38,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784194331] [2020-10-12 09:55:38,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:38,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:55:38,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703472586] [2020-10-12 09:55:38,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:55:38,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:38,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:55:38,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:55:38,704 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 12 states. [2020-10-12 09:55:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:38,873 INFO L93 Difference]: Finished difference Result 93 states and 121 transitions. [2020-10-12 09:55:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:55:38,873 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-12 09:55:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:38,874 INFO L225 Difference]: With dead ends: 93 [2020-10-12 09:55:38,874 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 09:55:38,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:55:38,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 09:55:38,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-12 09:55:38,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:55:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-12 09:55:38,883 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 29 [2020-10-12 09:55:38,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:38,883 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-12 09:55:38,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:55:38,883 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-12 09:55:38,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 09:55:38,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:38,884 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 09:55:38,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:55:38,885 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash 902249105, now seen corresponding path program 3 times [2020-10-12 09:55:38,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:38,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887180548] [2020-10-12 09:55:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:38,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:40,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:40,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 09:55:40,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:55:40,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1524 [2020-10-12 09:55:40,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:40,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:55:40,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:40,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 09:55:40,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:40,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:40,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:40,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:40,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:40,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:40,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:40,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:40,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:40,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-12 09:55:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:40,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:40,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:40,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:40,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:40,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:55:40,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:40,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:40,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:40,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:40,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:40,829 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 09:55:40,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887180548] [2020-10-12 09:55:40,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:40,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:55:40,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025888619] [2020-10-12 09:55:40,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:55:40,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:40,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:55:40,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:55:40,832 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 14 states. [2020-10-12 09:55:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:41,238 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2020-10-12 09:55:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:55:41,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-12 09:55:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:41,241 INFO L225 Difference]: With dead ends: 75 [2020-10-12 09:55:41,241 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 09:55:41,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:55:41,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 09:55:41,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-12 09:55:41,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 09:55:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-10-12 09:55:41,254 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 31 [2020-10-12 09:55:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:41,254 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-10-12 09:55:41,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:55:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-10-12 09:55:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 09:55:41,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:41,258 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:41,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:55:41,259 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:41,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:41,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1411035354, now seen corresponding path program 10 times [2020-10-12 09:55:41,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:41,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751527803] [2020-10-12 09:55:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:41,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:41,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:41,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:42,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:43,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:43,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 09:55:43,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:43,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1962 [2020-10-12 09:55:43,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:43,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:55:43,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:55:43,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 09:55:43,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:43,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:43,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:43,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:43,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:43,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:43,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:43,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:43,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:55:43,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751527803] [2020-10-12 09:55:43,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:43,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:55:43,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679151100] [2020-10-12 09:55:43,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:55:43,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:43,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:55:43,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:55:43,720 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 20 states. [2020-10-12 09:55:44,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:44,130 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-10-12 09:55:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:55:44,130 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-10-12 09:55:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:44,131 INFO L225 Difference]: With dead ends: 90 [2020-10-12 09:55:44,132 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 09:55:44,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:55:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 09:55:44,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 61. [2020-10-12 09:55:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 09:55:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-10-12 09:55:44,141 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-10-12 09:55:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:44,141 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-10-12 09:55:44,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:55:44,142 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-10-12 09:55:44,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 09:55:44,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:44,142 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:44,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:55:44,143 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:44,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1469509832, now seen corresponding path program 4 times [2020-10-12 09:55:44,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:44,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198103027] [2020-10-12 09:55:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:44,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:44,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:44,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:44,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:44,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:45,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:46,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:46,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 09:55:46,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:55:46,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1883 [2020-10-12 09:55:46,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:46,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:55:46,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:46,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:55:46,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:46,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:46,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:46,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:46,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:46,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:46,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:46,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:46,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:46,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:46,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:46,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:46,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:55:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:46,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:46,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:46,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:46,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:46,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:46,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:46,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:46,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:46,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:46,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:55:46,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198103027] [2020-10-12 09:55:46,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:46,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:55:46,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844735333] [2020-10-12 09:55:46,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:55:46,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:46,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:55:46,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:55:46,203 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 14 states. [2020-10-12 09:55:46,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:46,578 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2020-10-12 09:55:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:55:46,578 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-12 09:55:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:46,579 INFO L225 Difference]: With dead ends: 75 [2020-10-12 09:55:46,579 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 09:55:46,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:55:46,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 09:55:46,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2020-10-12 09:55:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 09:55:46,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-12 09:55:46,586 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 32 [2020-10-12 09:55:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:46,587 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-12 09:55:46,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:55:46,587 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-12 09:55:46,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 09:55:46,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:46,588 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:46,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:55:46,588 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:46,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:46,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1298655648, now seen corresponding path program 11 times [2020-10-12 09:55:46,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:46,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834201121] [2020-10-12 09:55:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:46,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:46,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:46,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:47,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:48,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:48,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 09:55:48,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:48,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1651 [2020-10-12 09:55:48,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:55:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:55:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:55:48,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:48,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:48,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:48,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:48,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:48,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:48,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:48,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:48,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:48,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:48,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:48,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:55:48,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834201121] [2020-10-12 09:55:48,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:48,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:55:48,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718256611] [2020-10-12 09:55:48,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:55:48,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:48,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:55:48,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:55:48,797 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 21 states. [2020-10-12 09:55:49,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:49,109 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2020-10-12 09:55:49,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:55:49,110 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-12 09:55:49,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:49,110 INFO L225 Difference]: With dead ends: 53 [2020-10-12 09:55:49,110 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 09:55:49,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:55:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 09:55:49,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-10-12 09:55:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 09:55:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-12 09:55:49,117 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 32 [2020-10-12 09:55:49,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:49,118 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-12 09:55:49,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:55:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-12 09:55:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 09:55:49,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:49,119 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:49,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:55:49,119 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:49,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:49,119 INFO L82 PathProgramCache]: Analyzing trace with hash 600269210, now seen corresponding path program 12 times [2020-10-12 09:55:49,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:49,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867821959] [2020-10-12 09:55:49,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:49,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:49,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:49,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:49,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:50,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:50,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 09:55:50,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:50,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1741 [2020-10-12 09:55:50,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:55:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:55:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 09:55:50,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:51,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:51,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:51,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:51,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:51,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:51,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:51,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:51,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:51,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:51,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:51,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:55:51,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867821959] [2020-10-12 09:55:51,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:51,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:55:51,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333634644] [2020-10-12 09:55:51,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:55:51,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:51,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:55:51,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:55:51,478 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 22 states. [2020-10-12 09:55:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:51,809 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2020-10-12 09:55:51,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:55:51,810 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-10-12 09:55:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:51,810 INFO L225 Difference]: With dead ends: 55 [2020-10-12 09:55:51,811 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 09:55:51,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:55:51,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 09:55:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2020-10-12 09:55:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 09:55:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-12 09:55:51,818 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 33 [2020-10-12 09:55:51,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:51,818 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-12 09:55:51,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:55:51,818 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-12 09:55:51,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 09:55:51,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:51,819 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:51,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:55:51,819 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:51,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:51,819 INFO L82 PathProgramCache]: Analyzing trace with hash -662602336, now seen corresponding path program 13 times [2020-10-12 09:55:51,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:51,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586136332] [2020-10-12 09:55:51,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:51,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:51,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:51,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:52,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:53,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:53,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 09:55:53,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:53,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1795 [2020-10-12 09:55:53,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:53,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:55:53,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:55:53,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:55:53,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:54,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:54,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:54,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:54,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:54,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:54,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:54,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:54,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:54,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:54,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:54,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 1 proven. 93 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:55:54,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586136332] [2020-10-12 09:55:54,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:54,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:55:54,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913205742] [2020-10-12 09:55:54,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:55:54,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:54,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:55:54,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:55:54,291 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 23 states. [2020-10-12 09:55:54,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:54,650 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-12 09:55:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:55:54,650 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2020-10-12 09:55:54,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:54,651 INFO L225 Difference]: With dead ends: 57 [2020-10-12 09:55:54,651 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 09:55:54,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:55:54,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 09:55:54,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-10-12 09:55:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 09:55:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-12 09:55:54,659 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 34 [2020-10-12 09:55:54,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:54,659 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-12 09:55:54,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:55:54,659 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-12 09:55:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 09:55:54,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:54,660 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:54,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:55:54,660 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1156914598, now seen corresponding path program 14 times [2020-10-12 09:55:54,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:54,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099229547] [2020-10-12 09:55:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:54,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:54,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:54,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:55,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:56,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:56,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 09:55:56,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:56,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2002 [2020-10-12 09:55:56,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:56,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:55:56,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:55:56,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 09:55:56,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:57,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:57,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:57,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:57,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:57,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:57,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:57,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:57,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:57,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:57,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:57,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 107 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:55:57,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099229547] [2020-10-12 09:55:57,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:57,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:55:57,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365631445] [2020-10-12 09:55:57,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:55:57,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:57,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:55:57,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:55:57,420 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 24 states. [2020-10-12 09:55:57,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:57,809 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2020-10-12 09:55:57,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:55:57,810 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-10-12 09:55:57,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:57,811 INFO L225 Difference]: With dead ends: 59 [2020-10-12 09:55:57,811 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 09:55:57,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=249, Invalid=563, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:55:57,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 09:55:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2020-10-12 09:55:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 09:55:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-12 09:55:57,820 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 35 [2020-10-12 09:55:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:57,821 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-12 09:55:57,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:55:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-12 09:55:57,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 09:55:57,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:57,822 INFO L422 BasicCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:57,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:55:57,822 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:57,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:57,822 INFO L82 PathProgramCache]: Analyzing trace with hash 699274464, now seen corresponding path program 15 times [2020-10-12 09:55:57,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:57,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491213464] [2020-10-12 09:55:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:57,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:57,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:57,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:59,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:59,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:59,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 09:55:59,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:59,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1935 [2020-10-12 09:55:59,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:59,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:55:59,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:55:59,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:55:59,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:00,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:00,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:00,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:00,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:00,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:00,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:00,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:00,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:00,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:00,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:00,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 1 proven. 122 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:56:00,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491213464] [2020-10-12 09:56:00,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:00,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:56:00,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005141219] [2020-10-12 09:56:00,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:56:00,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:00,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:56:00,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:56:00,586 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 25 states. [2020-10-12 09:56:00,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:00,968 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-12 09:56:00,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:56:00,968 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2020-10-12 09:56:00,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:00,969 INFO L225 Difference]: With dead ends: 61 [2020-10-12 09:56:00,970 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 09:56:00,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:56:00,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 09:56:00,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-10-12 09:56:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 09:56:00,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-12 09:56:00,978 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 36 [2020-10-12 09:56:00,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:00,978 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-12 09:56:00,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:56:00,978 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-12 09:56:00,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 09:56:00,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:00,979 INFO L422 BasicCegarLoop]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:00,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:56:00,979 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:00,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1888406758, now seen corresponding path program 16 times [2020-10-12 09:56:00,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:00,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464716973] [2020-10-12 09:56:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:00,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:00,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:01,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:03,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:03,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:03,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 09:56:03,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:03,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2751 [2020-10-12 09:56:03,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:03,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:56:03,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:56:03,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 09:56:03,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:04,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:04,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:04,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:04,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:04,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:04,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:04,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:04,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:04,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:04,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:04,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 1 proven. 138 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:56:04,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464716973] [2020-10-12 09:56:04,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:04,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:56:04,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937892385] [2020-10-12 09:56:04,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:56:04,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:04,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:56:04,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:56:04,649 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 26 states. [2020-10-12 09:56:05,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:05,003 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-10-12 09:56:05,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:56:05,004 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2020-10-12 09:56:05,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:05,005 INFO L225 Difference]: With dead ends: 63 [2020-10-12 09:56:05,005 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 09:56:05,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:56:05,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 09:56:05,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2020-10-12 09:56:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 09:56:05,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-12 09:56:05,012 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 37 [2020-10-12 09:56:05,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:05,012 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-12 09:56:05,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:56:05,012 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-12 09:56:05,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 09:56:05,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:05,012 INFO L422 BasicCegarLoop]: trace histogram [17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:05,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:56:05,013 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:05,013 INFO L82 PathProgramCache]: Analyzing trace with hash -502146016, now seen corresponding path program 17 times [2020-10-12 09:56:05,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:05,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125198229] [2020-10-12 09:56:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:05,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:05,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:05,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:06,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:07,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:07,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:56:07,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:07,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2302 [2020-10-12 09:56:07,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:07,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:56:07,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:56:07,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:56:07,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:08,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:08,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:08,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:08,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:08,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:08,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:08,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:08,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:08,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:08,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:08,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:56:08,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125198229] [2020-10-12 09:56:08,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:08,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:56:08,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923301103] [2020-10-12 09:56:08,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:56:08,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:08,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:56:08,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:56:08,326 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 27 states. [2020-10-12 09:56:08,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:08,698 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-12 09:56:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:56:08,701 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 38 [2020-10-12 09:56:08,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:08,702 INFO L225 Difference]: With dead ends: 65 [2020-10-12 09:56:08,702 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 09:56:08,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:56:08,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 09:56:08,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2020-10-12 09:56:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 09:56:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-12 09:56:08,709 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 38 [2020-10-12 09:56:08,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:08,710 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-12 09:56:08,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:56:08,710 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-12 09:56:08,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 09:56:08,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:08,710 INFO L422 BasicCegarLoop]: trace histogram [18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:08,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:56:08,711 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:08,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:08,711 INFO L82 PathProgramCache]: Analyzing trace with hash -477735974, now seen corresponding path program 18 times [2020-10-12 09:56:08,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:08,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429168272] [2020-10-12 09:56:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:08,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:08,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:08,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:10,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:11,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:11,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 09:56:11,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:11,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2433 [2020-10-12 09:56:11,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:11,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:56:11,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:56:11,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 09:56:11,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:12,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:12,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:12,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:12,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:12,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:12,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:12,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:12,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:12,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:12,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:12,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 1 proven. 173 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:56:12,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429168272] [2020-10-12 09:56:12,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:12,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:56:12,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337688394] [2020-10-12 09:56:12,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:56:12,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:12,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:56:12,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:56:12,247 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 28 states. [2020-10-12 09:56:12,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:12,716 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2020-10-12 09:56:12,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:56:12,716 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2020-10-12 09:56:12,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:12,717 INFO L225 Difference]: With dead ends: 67 [2020-10-12 09:56:12,717 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 09:56:12,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=343, Invalid=713, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:56:12,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 09:56:12,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2020-10-12 09:56:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 09:56:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-12 09:56:12,724 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 39 [2020-10-12 09:56:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:12,725 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-12 09:56:12,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:56:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-12 09:56:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 09:56:12,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:12,726 INFO L422 BasicCegarLoop]: trace histogram [19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:12,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:56:12,726 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:12,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:12,726 INFO L82 PathProgramCache]: Analyzing trace with hash 278975328, now seen corresponding path program 19 times [2020-10-12 09:56:12,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:12,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850837466] [2020-10-12 09:56:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:12,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:12,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:12,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:14,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:15,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:15,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 09:56:15,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:15,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2487 [2020-10-12 09:56:15,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:15,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:56:15,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:56:15,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:56:15,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:16,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:16,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:16,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:16,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:16,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:16,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:16,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:16,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:16,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:16,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:16,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 1 proven. 192 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:56:16,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850837466] [2020-10-12 09:56:16,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:16,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:56:16,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183954502] [2020-10-12 09:56:16,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:56:16,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:16,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:56:16,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=527, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:56:16,440 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 29 states. [2020-10-12 09:56:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:16,918 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2020-10-12 09:56:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:56:16,919 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2020-10-12 09:56:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:16,920 INFO L225 Difference]: With dead ends: 69 [2020-10-12 09:56:16,920 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 09:56:16,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:56:16,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 09:56:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-10-12 09:56:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 09:56:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-12 09:56:16,928 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 40 [2020-10-12 09:56:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:16,928 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-12 09:56:16,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:56:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-12 09:56:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 09:56:16,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:16,929 INFO L422 BasicCegarLoop]: trace histogram [20, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:16,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:56:16,930 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:16,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:16,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2032778086, now seen corresponding path program 20 times [2020-10-12 09:56:16,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:16,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749553390] [2020-10-12 09:56:16,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:16,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:16,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:16,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:18,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:19,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:19,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 09:56:19,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:19,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2750 [2020-10-12 09:56:19,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:19,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:56:19,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:56:19,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 09:56:19,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:20,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:20,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:20,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:20,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:20,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:20,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:20,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:20,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:20,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:20,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:20,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 1 proven. 212 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:56:20,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749553390] [2020-10-12 09:56:20,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:20,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:56:20,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226736038] [2020-10-12 09:56:20,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:56:20,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:20,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:56:20,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=561, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:56:20,988 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 30 states. [2020-10-12 09:56:21,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:21,432 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2020-10-12 09:56:21,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:56:21,433 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 41 [2020-10-12 09:56:21,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:21,434 INFO L225 Difference]: With dead ends: 71 [2020-10-12 09:56:21,434 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 09:56:21,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=396, Invalid=794, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:56:21,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 09:56:21,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2020-10-12 09:56:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:56:21,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-12 09:56:21,441 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 41 [2020-10-12 09:56:21,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:21,441 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-12 09:56:21,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:56:21,442 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-12 09:56:21,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 09:56:21,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:21,442 INFO L422 BasicCegarLoop]: trace histogram [21, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:21,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:56:21,442 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:21,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:21,442 INFO L82 PathProgramCache]: Analyzing trace with hash -682689888, now seen corresponding path program 21 times [2020-10-12 09:56:21,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:21,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000017357] [2020-10-12 09:56:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:21,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:21,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:21,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:22,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:24,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:24,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 09:56:24,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:24,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2791 [2020-10-12 09:56:24,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:24,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:56:24,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:56:24,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:56:24,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:25,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:25,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:25,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:25,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:25,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:25,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:56:25,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:25,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:25,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:25,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:25,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 1 proven. 233 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:56:25,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000017357] [2020-10-12 09:56:25,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:25,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:56:25,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661108269] [2020-10-12 09:56:25,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:56:25,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:25,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:56:25,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=596, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:56:25,914 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 31 states. [2020-10-12 09:56:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:26,335 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2020-10-12 09:56:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:56:26,335 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 42 [2020-10-12 09:56:26,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:26,336 INFO L225 Difference]: With dead ends: 73 [2020-10-12 09:56:26,337 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 09:56:26,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:56:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 09:56:26,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 44. [2020-10-12 09:56:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 09:56:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-12 09:56:26,344 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 42 [2020-10-12 09:56:26,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:26,345 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-12 09:56:26,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:56:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-12 09:56:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:56:26,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:26,345 INFO L422 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:26,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:56:26,346 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:26,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:26,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1779628710, now seen corresponding path program 22 times [2020-10-12 09:56:26,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:26,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71208380] [2020-10-12 09:56:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:26,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:26,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:26,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:27,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:29,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:29,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 09:56:29,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:29,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2818 [2020-10-12 09:56:29,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:29,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:56:29,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:56:29,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 09:56:29,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:30,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:30,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:30,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:30,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:30,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:30,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:30,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:30,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:30,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:30,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:30,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 1 proven. 255 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:56:30,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71208380] [2020-10-12 09:56:30,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:30,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:56:30,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015002784] [2020-10-12 09:56:30,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:56:30,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:30,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:56:30,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=632, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:56:30,931 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 32 states. [2020-10-12 09:56:31,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:31,418 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2020-10-12 09:56:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:56:31,419 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 43 [2020-10-12 09:56:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:31,420 INFO L225 Difference]: With dead ends: 75 [2020-10-12 09:56:31,420 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 09:56:31,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=453, Invalid=879, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:56:31,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 09:56:31,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-10-12 09:56:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 09:56:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-12 09:56:31,428 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 43 [2020-10-12 09:56:31,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:31,429 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-12 09:56:31,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:56:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-12 09:56:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 09:56:31,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:31,429 INFO L422 BasicCegarLoop]: trace histogram [23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:31,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:56:31,430 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:31,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:31,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1424993824, now seen corresponding path program 23 times [2020-10-12 09:56:31,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:31,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600308128] [2020-10-12 09:56:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:31,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:31,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:31,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:32,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:34,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:34,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 09:56:34,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:34,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2976 [2020-10-12 09:56:34,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:34,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:56:34,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:56:34,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:56:34,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:36,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:36,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:36,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:36,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:36,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:36,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:36,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:36,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:36,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:36,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:36,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 1 proven. 278 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:56:36,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600308128] [2020-10-12 09:56:36,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:36,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:56:36,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671597072] [2020-10-12 09:56:36,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:56:36,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:36,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:56:36,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=669, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:56:36,113 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 33 states. [2020-10-12 09:56:36,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:36,663 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2020-10-12 09:56:36,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:56:36,664 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 44 [2020-10-12 09:56:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:36,665 INFO L225 Difference]: With dead ends: 77 [2020-10-12 09:56:36,665 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 09:56:36,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=483, Invalid=923, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:56:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 09:56:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-10-12 09:56:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 09:56:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-12 09:56:36,672 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 44 [2020-10-12 09:56:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:36,673 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-12 09:56:36,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:56:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-12 09:56:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 09:56:36,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:36,673 INFO L422 BasicCegarLoop]: trace histogram [24, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:36,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:56:36,674 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:36,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:36,674 INFO L82 PathProgramCache]: Analyzing trace with hash 978753050, now seen corresponding path program 24 times [2020-10-12 09:56:36,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:36,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497812858] [2020-10-12 09:56:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:36,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:36,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:36,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:38,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:39,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:39,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 09:56:39,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:39,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3063 [2020-10-12 09:56:39,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:39,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:56:39,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:56:39,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 09:56:39,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:41,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:41,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:41,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:41,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:41,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:41,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:41,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:41,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:41,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:41,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:41,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 1 proven. 302 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:56:41,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497812858] [2020-10-12 09:56:41,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:41,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:56:41,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992795659] [2020-10-12 09:56:41,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:56:41,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:41,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:56:41,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=707, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:56:41,574 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 34 states. [2020-10-12 09:56:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:42,177 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2020-10-12 09:56:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:56:42,178 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 45 [2020-10-12 09:56:42,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:42,179 INFO L225 Difference]: With dead ends: 79 [2020-10-12 09:56:42,179 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 09:56:42,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=514, Invalid=968, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:56:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 09:56:42,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 47. [2020-10-12 09:56:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 09:56:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-12 09:56:42,187 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 45 [2020-10-12 09:56:42,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:42,187 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-12 09:56:42,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:56:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-12 09:56:42,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 09:56:42,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:42,188 INFO L422 BasicCegarLoop]: trace histogram [25, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:42,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:56:42,189 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:42,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1814505184, now seen corresponding path program 25 times [2020-10-12 09:56:42,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:42,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727739290] [2020-10-12 09:56:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:42,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:42,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:42,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:44,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:45,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:45,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 09:56:45,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:45,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3547 [2020-10-12 09:56:45,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:45,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:56:45,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:56:45,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:56:45,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:47,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:47,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:47,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:47,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:47,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:47,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:47,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:47,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:47,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:47,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:47,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 1 proven. 327 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:56:47,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727739290] [2020-10-12 09:56:47,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:47,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:56:47,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794383682] [2020-10-12 09:56:47,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:56:47,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:47,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:56:47,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:56:47,726 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 35 states. [2020-10-12 09:56:48,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:48,374 INFO L93 Difference]: Finished difference Result 81 states and 107 transitions. [2020-10-12 09:56:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:56:48,374 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2020-10-12 09:56:48,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:48,375 INFO L225 Difference]: With dead ends: 81 [2020-10-12 09:56:48,376 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 09:56:48,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:56:48,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 09:56:48,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2020-10-12 09:56:48,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 09:56:48,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-12 09:56:48,391 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 46 [2020-10-12 09:56:48,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:48,392 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-12 09:56:48,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:56:48,392 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-12 09:56:48,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 09:56:48,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:48,395 INFO L422 BasicCegarLoop]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:48,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:56:48,395 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:48,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:48,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1788802778, now seen corresponding path program 26 times [2020-10-12 09:56:48,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:48,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523913364] [2020-10-12 09:56:48,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:48,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:48,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:48,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:50,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:52,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:52,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:56:52,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:52,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3649 [2020-10-12 09:56:52,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:52,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:56:52,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:56:52,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 09:56:52,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:54,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:54,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:54,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:54,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:54,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:54,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:56:54,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:54,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:54,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:54,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:54,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 1 proven. 353 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:56:54,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523913364] [2020-10-12 09:56:54,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:54,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:56:54,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938593046] [2020-10-12 09:56:54,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:56:54,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:54,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:56:54,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=786, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:56:54,320 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 36 states. [2020-10-12 09:56:54,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:54,957 INFO L93 Difference]: Finished difference Result 83 states and 110 transitions. [2020-10-12 09:56:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:56:54,958 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 47 [2020-10-12 09:56:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:54,959 INFO L225 Difference]: With dead ends: 83 [2020-10-12 09:56:54,959 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 09:56:54,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=579, Invalid=1061, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:56:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 09:56:54,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 49. [2020-10-12 09:56:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 09:56:54,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-12 09:56:54,973 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 47 [2020-10-12 09:56:54,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:54,973 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-12 09:56:54,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:56:54,973 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-12 09:56:54,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 09:56:54,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:54,974 INFO L422 BasicCegarLoop]: trace histogram [27, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:54,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:56:54,974 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:54,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:54,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1822199904, now seen corresponding path program 27 times [2020-10-12 09:56:54,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:54,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037929892] [2020-10-12 09:56:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:54,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:54,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:55,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:56,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:59,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:59,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 09:56:59,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:59,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4191 [2020-10-12 09:56:59,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:59,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 09:56:59,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:56:59,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:56:59,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:01,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:01,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:01,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:01,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:01,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:01,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:01,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:01,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:01,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:01,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:01,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 1 proven. 380 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:57:01,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037929892] [2020-10-12 09:57:01,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:01,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:57:01,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574032642] [2020-10-12 09:57:01,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:57:01,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:01,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:57:01,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=827, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:57:01,654 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 37 states. [2020-10-12 09:57:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:02,348 INFO L93 Difference]: Finished difference Result 85 states and 113 transitions. [2020-10-12 09:57:02,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:57:02,349 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 48 [2020-10-12 09:57:02,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:02,350 INFO L225 Difference]: With dead ends: 85 [2020-10-12 09:57:02,350 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 09:57:02,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=613, Invalid=1109, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:57:02,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 09:57:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-10-12 09:57:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 09:57:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-12 09:57:02,362 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 48 [2020-10-12 09:57:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:02,363 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-12 09:57:02,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 09:57:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-12 09:57:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 09:57:02,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:02,364 INFO L422 BasicCegarLoop]: trace histogram [28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:02,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:57:02,364 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:02,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1437456486, now seen corresponding path program 28 times [2020-10-12 09:57:02,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:02,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529954427] [2020-10-12 09:57:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:02,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:02,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:02,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:05,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:06,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:06,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:57:06,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:57:06,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4187 [2020-10-12 09:57:06,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 09:57:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:57:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 09:57:06,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:09,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:09,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:09,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:09,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:09,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:09,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:09,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:09,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:09,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:09,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:09,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 1 proven. 408 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:57:09,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529954427] [2020-10-12 09:57:09,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:09,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 09:57:09,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048500062] [2020-10-12 09:57:09,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 09:57:09,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:09,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 09:57:09,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=869, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:57:09,354 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 38 states. [2020-10-12 09:57:10,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:10,120 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2020-10-12 09:57:10,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:57:10,121 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 49 [2020-10-12 09:57:10,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:10,122 INFO L225 Difference]: With dead ends: 87 [2020-10-12 09:57:10,123 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 09:57:10,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=648, Invalid=1158, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 09:57:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 09:57:10,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 51. [2020-10-12 09:57:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 09:57:10,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-12 09:57:10,135 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 49 [2020-10-12 09:57:10,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:10,136 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-12 09:57:10,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 09:57:10,136 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-12 09:57:10,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 09:57:10,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:10,137 INFO L422 BasicCegarLoop]: trace histogram [29, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:10,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:57:10,137 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:10,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:10,137 INFO L82 PathProgramCache]: Analyzing trace with hash 592410528, now seen corresponding path program 29 times [2020-10-12 09:57:10,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:10,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59951569] [2020-10-12 09:57:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:10,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:10,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:10,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:12,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:14,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:14,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 09:57:14,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:57:14,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4484 [2020-10-12 09:57:14,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 09:57:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:57:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:57:14,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:17,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:17,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:17,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:17,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:17,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:17,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:17,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:17,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:17,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:17,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:17,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 1 proven. 437 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:57:17,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59951569] [2020-10-12 09:57:17,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:17,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 09:57:17,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44988271] [2020-10-12 09:57:17,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 09:57:17,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:17,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 09:57:17,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:57:17,348 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 39 states. [2020-10-12 09:57:18,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:18,124 INFO L93 Difference]: Finished difference Result 89 states and 119 transitions. [2020-10-12 09:57:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 09:57:18,124 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 50 [2020-10-12 09:57:18,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:18,126 INFO L225 Difference]: With dead ends: 89 [2020-10-12 09:57:18,126 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 09:57:18,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=684, Invalid=1208, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:57:18,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 09:57:18,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-12 09:57:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 09:57:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-12 09:57:18,140 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 50 [2020-10-12 09:57:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:18,140 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-12 09:57:18,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 09:57:18,140 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-12 09:57:18,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 09:57:18,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:18,141 INFO L422 BasicCegarLoop]: trace histogram [30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:18,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:57:18,141 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:18,141 INFO L82 PathProgramCache]: Analyzing trace with hash -906221478, now seen corresponding path program 30 times [2020-10-12 09:57:18,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:18,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108413852] [2020-10-12 09:57:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:18,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:18,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:18,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:20,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:23,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:23,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 09:57:23,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:57:23,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:57:23,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:23,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 09:57:23,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:57:23,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 09:57:23,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:25,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:25,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:25,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:25,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:25,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:25,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:25,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:25,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:25,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:25,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:25,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 1 proven. 467 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:57:25,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108413852] [2020-10-12 09:57:25,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:25,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 09:57:25,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528102968] [2020-10-12 09:57:25,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 09:57:25,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:25,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 09:57:25,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=956, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:57:25,983 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 40 states. [2020-10-12 09:57:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:26,783 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2020-10-12 09:57:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 09:57:26,784 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 51 [2020-10-12 09:57:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:26,785 INFO L225 Difference]: With dead ends: 91 [2020-10-12 09:57:26,785 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 09:57:26,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=721, Invalid=1259, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 09:57:26,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 09:57:26,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 53. [2020-10-12 09:57:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 09:57:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-12 09:57:26,798 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 51 [2020-10-12 09:57:26,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:26,798 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-12 09:57:26,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 09:57:26,798 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-12 09:57:26,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 09:57:26,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:26,799 INFO L422 BasicCegarLoop]: trace histogram [31, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:26,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:57:26,799 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:26,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:26,799 INFO L82 PathProgramCache]: Analyzing trace with hash -119173408, now seen corresponding path program 31 times [2020-10-12 09:57:26,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:26,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634992907] [2020-10-12 09:57:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:26,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:26,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:26,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:29,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:31,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:31,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 09:57:31,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:57:31,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:57:31,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:31,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 09:57:31,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:57:31,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:57:31,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:34,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:34,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:34,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:34,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:34,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:34,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:34,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:34,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:34,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:34,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:34,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 1 proven. 498 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:57:34,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634992907] [2020-10-12 09:57:34,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:34,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 09:57:34,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143628051] [2020-10-12 09:57:34,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 09:57:34,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:34,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 09:57:34,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=1001, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:57:34,889 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 41 states. [2020-10-12 09:57:35,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:35,697 INFO L93 Difference]: Finished difference Result 93 states and 125 transitions. [2020-10-12 09:57:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 09:57:35,698 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 52 [2020-10-12 09:57:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:35,699 INFO L225 Difference]: With dead ends: 93 [2020-10-12 09:57:35,699 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 09:57:35,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=759, Invalid=1311, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 09:57:35,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 09:57:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2020-10-12 09:57:35,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 09:57:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-12 09:57:35,711 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 52 [2020-10-12 09:57:35,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:35,712 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-12 09:57:35,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 09:57:35,712 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-12 09:57:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:57:35,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:35,713 INFO L422 BasicCegarLoop]: trace histogram [32, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:35,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:57:35,713 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:35,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1490487014, now seen corresponding path program 32 times [2020-10-12 09:57:35,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:35,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316187275] [2020-10-12 09:57:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:35,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:35,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:35,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:38,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:40,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:40,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 09:57:40,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:57:40,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:57:40,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:40,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 09:57:40,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:57:40,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 09:57:40,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:44,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:44,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:44,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:44,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:44,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:44,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:44,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:44,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:44,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:44,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:44,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 1 proven. 530 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:57:44,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316187275] [2020-10-12 09:57:44,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:44,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 09:57:44,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899955629] [2020-10-12 09:57:44,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 09:57:44,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:44,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 09:57:44,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1047, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:57:44,037 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 42 states. [2020-10-12 09:57:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:44,966 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2020-10-12 09:57:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 09:57:44,967 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 53 [2020-10-12 09:57:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:44,968 INFO L225 Difference]: With dead ends: 95 [2020-10-12 09:57:44,969 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 09:57:44,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=798, Invalid=1364, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 09:57:44,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 09:57:44,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2020-10-12 09:57:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 09:57:44,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-12 09:57:44,983 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 53 [2020-10-12 09:57:44,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:44,983 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-12 09:57:44,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 09:57:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-12 09:57:44,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 09:57:44,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:44,984 INFO L422 BasicCegarLoop]: trace histogram [33, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:44,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:57:44,984 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:44,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1051535840, now seen corresponding path program 33 times [2020-10-12 09:57:44,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:44,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811074] [2020-10-12 09:57:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:44,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:44,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:45,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:48,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:49,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:49,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 09:57:49,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:57:49,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:57:49,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:49,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 09:57:49,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:57:49,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:57:49,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:53,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:53,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:53,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:53,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:53,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:53,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:53,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:53,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:53,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:53,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:53,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 1 proven. 563 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:57:53,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811074] [2020-10-12 09:57:53,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:53,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 09:57:53,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121720671] [2020-10-12 09:57:53,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 09:57:53,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:53,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 09:57:53,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=1094, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 09:57:53,567 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 43 states. [2020-10-12 09:57:54,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:54,538 INFO L93 Difference]: Finished difference Result 97 states and 131 transitions. [2020-10-12 09:57:54,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 09:57:54,538 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 54 [2020-10-12 09:57:54,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:54,540 INFO L225 Difference]: With dead ends: 97 [2020-10-12 09:57:54,540 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 09:57:54,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=838, Invalid=1418, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 09:57:54,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 09:57:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 56. [2020-10-12 09:57:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 09:57:54,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-12 09:57:54,554 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 54 [2020-10-12 09:57:54,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:54,554 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-12 09:57:54,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 09:57:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-12 09:57:54,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 09:57:54,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:54,555 INFO L422 BasicCegarLoop]: trace histogram [34, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:54,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 09:57:54,555 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:54,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:54,556 INFO L82 PathProgramCache]: Analyzing trace with hash -328951334, now seen corresponding path program 34 times [2020-10-12 09:57:54,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:54,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463664927] [2020-10-12 09:57:54,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:54,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:54,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:54,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:58,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:59,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:59,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 09:57:59,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:57:59,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:57:59,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 09:57:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:57:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 09:57:59,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:03,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:03,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:03,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:03,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:03,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:03,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:03,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:03,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:03,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:03,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:03,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 1 proven. 597 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:58:03,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463664927] [2020-10-12 09:58:03,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:03,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 09:58:03,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407619161] [2020-10-12 09:58:03,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 09:58:03,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:03,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 09:58:03,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=1142, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:58:03,246 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 44 states. [2020-10-12 09:58:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:04,286 INFO L93 Difference]: Finished difference Result 99 states and 134 transitions. [2020-10-12 09:58:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 09:58:04,287 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 55 [2020-10-12 09:58:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:04,288 INFO L225 Difference]: With dead ends: 99 [2020-10-12 09:58:04,288 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 09:58:04,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 09:58:04,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 09:58:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 57. [2020-10-12 09:58:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 09:58:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-12 09:58:04,306 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 55 [2020-10-12 09:58:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:04,306 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-12 09:58:04,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 09:58:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-12 09:58:04,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 09:58:04,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:04,307 INFO L422 BasicCegarLoop]: trace histogram [35, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:04,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 09:58:04,307 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:04,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:04,307 INFO L82 PathProgramCache]: Analyzing trace with hash 596331872, now seen corresponding path program 35 times [2020-10-12 09:58:04,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:04,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860653728] [2020-10-12 09:58:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:04,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:04,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:04,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:07,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:09,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:09,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 09:58:09,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:58:09,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:58:09,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:09,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 09:58:09,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:58:09,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:58:09,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:13,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:13,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:13,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:13,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:13,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:13,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:13,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:13,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:13,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:13,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:13,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 1 proven. 632 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:58:13,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860653728] [2020-10-12 09:58:13,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:13,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 09:58:13,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524415358] [2020-10-12 09:58:13,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 09:58:13,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:13,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 09:58:13,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=789, Invalid=1191, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 09:58:13,221 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 45 states. [2020-10-12 09:58:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:14,311 INFO L93 Difference]: Finished difference Result 101 states and 137 transitions. [2020-10-12 09:58:14,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 09:58:14,312 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 56 [2020-10-12 09:58:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:14,313 INFO L225 Difference]: With dead ends: 101 [2020-10-12 09:58:14,314 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 09:58:14,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=921, Invalid=1529, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:58:14,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 09:58:14,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2020-10-12 09:58:14,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 09:58:14,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-12 09:58:14,331 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 56 [2020-10-12 09:58:14,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:14,331 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-12 09:58:14,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 09:58:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-12 09:58:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 09:58:14,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:14,332 INFO L422 BasicCegarLoop]: trace histogram [36, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:14,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 09:58:14,332 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:14,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:14,332 INFO L82 PathProgramCache]: Analyzing trace with hash -784659814, now seen corresponding path program 36 times [2020-10-12 09:58:14,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:14,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732521324] [2020-10-12 09:58:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:14,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:14,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:14,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:17,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:19,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:19,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 09:58:19,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:58:19,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:58:19,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:19,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 09:58:19,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:58:19,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 09:58:19,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:22,433 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 16 [2020-10-12 09:58:22,827 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2020-10-12 09:58:23,031 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 16 [2020-10-12 09:58:23,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:23,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:23,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:23,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:23,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:23,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:23,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:23,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:23,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:23,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:23,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 1 proven. 668 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:58:23,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732521324] [2020-10-12 09:58:23,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:23,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 09:58:23,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918614587] [2020-10-12 09:58:23,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 09:58:23,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:23,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 09:58:23,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=1241, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 09:58:23,487 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 46 states. [2020-10-12 09:58:24,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:24,511 INFO L93 Difference]: Finished difference Result 103 states and 140 transitions. [2020-10-12 09:58:24,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 09:58:24,511 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 57 [2020-10-12 09:58:24,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:24,513 INFO L225 Difference]: With dead ends: 103 [2020-10-12 09:58:24,513 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 09:58:24,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=964, Invalid=1586, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 09:58:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 09:58:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 59. [2020-10-12 09:58:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 09:58:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-12 09:58:24,531 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 57 [2020-10-12 09:58:24,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:24,531 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-12 09:58:24,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 09:58:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-12 09:58:24,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 09:58:24,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:24,532 INFO L422 BasicCegarLoop]: trace histogram [37, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:24,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 09:58:24,532 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:24,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:24,532 INFO L82 PathProgramCache]: Analyzing trace with hash -645729120, now seen corresponding path program 37 times [2020-10-12 09:58:24,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:24,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313992912] [2020-10-12 09:58:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:24,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:24,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:24,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:28,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:29,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:29,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 09:58:29,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:58:29,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 09:58:29,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:29,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 09:58:29,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:58:29,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:58:29,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:33,293 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 16 [2020-10-12 09:58:33,508 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 16 [2020-10-12 09:58:33,732 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 11 [2020-10-12 09:58:33,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:33,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:33,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:33,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:33,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:33,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:33,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:33,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:33,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:33,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:33,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 1 proven. 705 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:58:33,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313992912] [2020-10-12 09:58:33,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:33,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 09:58:33,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246690753] [2020-10-12 09:58:33,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 09:58:33,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:33,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 09:58:33,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=1292, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 09:58:33,976 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 47 states. [2020-10-12 09:58:35,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:35,287 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2020-10-12 09:58:35,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 09:58:35,287 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 58 [2020-10-12 09:58:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:35,288 INFO L225 Difference]: With dead ends: 105 [2020-10-12 09:58:35,288 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 09:58:35,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1008, Invalid=1644, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 09:58:35,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 09:58:35,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 60. [2020-10-12 09:58:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 09:58:35,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-12 09:58:35,307 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 58 [2020-10-12 09:58:35,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:35,308 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-12 09:58:35,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 09:58:35,308 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-12 09:58:35,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 09:58:35,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:35,308 INFO L422 BasicCegarLoop]: trace histogram [38, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:35,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 09:58:35,309 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:35,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:35,309 INFO L82 PathProgramCache]: Analyzing trace with hash -633844902, now seen corresponding path program 38 times [2020-10-12 09:58:35,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:35,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508990431] [2020-10-12 09:58:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:35,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:35,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:35,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:39,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:40,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:40,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 09:58:40,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:58:40,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:58:40,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:40,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 09:58:40,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:58:40,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 09:58:40,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:43,875 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2020-10-12 09:58:44,093 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 16 [2020-10-12 09:58:44,311 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 16 [2020-10-12 09:58:44,527 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2020-10-12 09:58:44,752 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 11 [2020-10-12 09:58:44,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:44,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:44,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:44,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:44,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:44,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:44,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:44,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:44,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 1 proven. 743 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:58:45,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508990431] [2020-10-12 09:58:45,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:45,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 09:58:45,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498576123] [2020-10-12 09:58:45,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 09:58:45,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:45,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 09:58:45,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=1344, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 09:58:45,013 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 48 states. [2020-10-12 09:58:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:46,320 INFO L93 Difference]: Finished difference Result 107 states and 146 transitions. [2020-10-12 09:58:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 09:58:46,320 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 59 [2020-10-12 09:58:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:46,322 INFO L225 Difference]: With dead ends: 107 [2020-10-12 09:58:46,322 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 09:58:46,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 09:58:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 09:58:46,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 61. [2020-10-12 09:58:46,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 09:58:46,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-12 09:58:46,344 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 59 [2020-10-12 09:58:46,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:46,344 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-12 09:58:46,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 09:58:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-12 09:58:46,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 09:58:46,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:46,345 INFO L422 BasicCegarLoop]: trace histogram [39, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:46,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 09:58:46,345 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:46,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:46,346 INFO L82 PathProgramCache]: Analyzing trace with hash -265434144, now seen corresponding path program 39 times [2020-10-12 09:58:46,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:46,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121552835] [2020-10-12 09:58:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:46,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:46,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:46,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:50,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:51,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:51,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 09:58:51,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:58:51,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:58:51,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:51,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 09:58:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:58:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:58:51,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:54,967 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2020-10-12 09:58:55,175 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 16 [2020-10-12 09:58:55,395 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 16 [2020-10-12 09:58:55,616 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2020-10-12 09:58:55,850 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 16 [2020-10-12 09:58:56,092 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 11 [2020-10-12 09:58:56,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:56,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:56,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:56,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:56,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:56,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:56,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:56,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:56,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:56,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:56,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 1 proven. 782 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:58:56,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121552835] [2020-10-12 09:58:56,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:56,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 09:58:56,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272381119] [2020-10-12 09:58:56,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 09:58:56,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:56,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 09:58:56,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=1397, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 09:58:56,356 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 49 states. [2020-10-12 09:58:57,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:57,695 INFO L93 Difference]: Finished difference Result 109 states and 149 transitions. [2020-10-12 09:58:57,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 09:58:57,695 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 60 [2020-10-12 09:58:57,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:57,697 INFO L225 Difference]: With dead ends: 109 [2020-10-12 09:58:57,697 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 09:58:57,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1099, Invalid=1763, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 09:58:57,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 09:58:57,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2020-10-12 09:58:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 09:58:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-12 09:58:57,719 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 60 [2020-10-12 09:58:57,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:57,719 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-12 09:58:57,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 09:58:57,719 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-12 09:58:57,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 09:58:57,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:57,720 INFO L422 BasicCegarLoop]: trace histogram [40, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:57,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 09:58:57,720 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:57,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1729602534, now seen corresponding path program 40 times [2020-10-12 09:58:57,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:57,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597275802] [2020-10-12 09:58:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:57,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:57,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:57,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:01,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:02,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:02,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 09:59:02,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:59:02,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:59:02,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:02,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 09:59:02,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:59:02,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 09:59:02,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:05,062 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 16 [2020-10-12 09:59:06,371 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2020-10-12 09:59:06,580 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 16 [2020-10-12 09:59:06,797 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 16 [2020-10-12 09:59:07,021 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2020-10-12 09:59:07,255 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 16 [2020-10-12 09:59:07,489 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 16 [2020-10-12 09:59:07,737 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 11 [2020-10-12 09:59:07,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:07,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:07,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:07,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:07,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:07,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:59:07,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:07,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:07,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:07,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:07,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 1 proven. 822 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:59:08,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597275802] [2020-10-12 09:59:08,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:08,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 09:59:08,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858789535] [2020-10-12 09:59:08,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 09:59:08,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:08,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 09:59:08,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=1451, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:59:08,006 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 50 states. [2020-10-12 09:59:09,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:09,501 INFO L93 Difference]: Finished difference Result 111 states and 152 transitions. [2020-10-12 09:59:09,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 09:59:09,502 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 61 [2020-10-12 09:59:09,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:09,504 INFO L225 Difference]: With dead ends: 111 [2020-10-12 09:59:09,504 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 09:59:09,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1146, Invalid=1824, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 09:59:09,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 09:59:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 63. [2020-10-12 09:59:09,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 09:59:09,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-12 09:59:09,537 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 61 [2020-10-12 09:59:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:09,538 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-12 09:59:09,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 09:59:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-12 09:59:09,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 09:59:09,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:09,539 INFO L422 BasicCegarLoop]: trace histogram [41, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:09,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 09:59:09,539 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:09,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:09,539 INFO L82 PathProgramCache]: Analyzing trace with hash 125817632, now seen corresponding path program 41 times [2020-10-12 09:59:09,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:09,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978105249] [2020-10-12 09:59:09,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:09,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:13,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:14,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:14,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 09:59:14,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:59:14,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:59:14,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:14,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 09:59:14,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:59:14,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:59:14,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:18,158 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2020-10-12 09:59:18,363 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 16 [2020-10-12 09:59:18,585 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 16 [2020-10-12 09:59:18,813 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16