/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/sanfoundry_10_ground.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:43:42,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:43:42,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:43:42,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:43:42,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:43:42,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:43:42,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:43:42,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:43:42,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:43:42,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:43:42,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:43:42,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:43:42,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:43:42,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:43:42,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:43:42,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:43:42,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:43:42,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:43:42,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:43:42,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:43:42,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:43:42,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:43:42,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:43:42,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:43:42,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:43:42,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:43:42,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:43:42,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:43:42,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:43:42,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:43:42,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:43:42,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:43:42,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:43:42,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:43:42,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:43:42,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:43:42,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:43:42,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:43:42,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:43:42,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:43:42,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:43:42,811 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 09:43:42,855 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:43:42,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:43:42,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:43:42,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:43:42,857 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:43:42,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:43:42,858 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:43:42,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:43:42,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:43:42,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:43:42,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:43:42,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:43:42,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:43:42,860 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:43:42,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:43:42,861 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:43:42,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:43:42,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:43:42,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:43:42,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:43:42,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:43:42,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:43:42,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:43:42,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:43:42,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:43:42,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:43:42,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:43:42,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:43:42,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:43:42,864 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 09:43:43,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:43:43,183 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:43:43,186 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:43:43,188 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:43:43,189 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:43:43,189 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2020-10-12 09:43:43,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/878fbbaa0/5a03e9efebc3479eb1817d887f3c23e8/FLAGd36271ed1 [2020-10-12 09:43:43,709 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:43:43,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2020-10-12 09:43:43,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/878fbbaa0/5a03e9efebc3479eb1817d887f3c23e8/FLAGd36271ed1 [2020-10-12 09:43:44,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/878fbbaa0/5a03e9efebc3479eb1817d887f3c23e8 [2020-10-12 09:43:44,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:43:44,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:43:44,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:43:44,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:43:44,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:43:44,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:43:44" (1/1) ... [2020-10-12 09:43:44,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@348d845f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:44, skipping insertion in model container [2020-10-12 09:43:44,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:43:44" (1/1) ... [2020-10-12 09:43:44,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:43:44,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:43:44,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:43:44,335 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:43:44,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:43:44,379 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:43:44,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:44 WrapperNode [2020-10-12 09:43:44,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:43:44,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:43:44,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:43:44,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:43:44,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:44" (1/1) ... [2020-10-12 09:43:44,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:44" (1/1) ... [2020-10-12 09:43:44,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:44" (1/1) ... [2020-10-12 09:43:44,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:44" (1/1) ... [2020-10-12 09:43:44,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:44" (1/1) ... [2020-10-12 09:43:44,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:44" (1/1) ... [2020-10-12 09:43:44,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:44" (1/1) ... [2020-10-12 09:43:44,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:43:44,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:43:44,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:43:44,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:43:44,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:44" (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 09:43:44,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:43:44,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:43:44,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:43:44,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:43:44,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:43:44,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:43:44,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:43:44,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:43:44,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:43:44,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:43:44,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:43:44,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:43:44,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:43:44,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:43:44,838 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:43:44,839 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-12 09:43:44,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:43:44 BoogieIcfgContainer [2020-10-12 09:43:44,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:43:44,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:43:44,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:43:44,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:43:44,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:43:44" (1/3) ... [2020-10-12 09:43:44,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fd6f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:43:44, skipping insertion in model container [2020-10-12 09:43:44,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:43:44" (2/3) ... [2020-10-12 09:43:44,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fd6f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:43:44, skipping insertion in model container [2020-10-12 09:43:44,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:43:44" (3/3) ... [2020-10-12 09:43:44,853 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2020-10-12 09:43:44,866 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:43:44,876 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:43:44,896 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:43:44,927 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:43:44,928 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:43:44,928 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:43:44,928 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:43:44,928 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:43:44,928 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:43:44,928 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:43:44,929 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:43:44,954 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-12 09:43:44,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 09:43:44,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:44,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:44,963 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:44,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:44,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1746448729, now seen corresponding path program 1 times [2020-10-12 09:43:44,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:44,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392163643] [2020-10-12 09:43:44,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:45,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:45,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 09:43:45,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:43:45,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-12 09:43:45,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:45,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:43:45,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:43:45,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:43:45,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:43:45,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:45,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:45,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:45,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:45,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:43:45,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:45,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:45,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:45,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:45,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:45,512 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 09:43:45,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392163643] [2020-10-12 09:43:45,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:43:45,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:43:45,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814639223] [2020-10-12 09:43:45,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:43:45,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:45,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:43:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:43:45,543 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2020-10-12 09:43:45,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:45,693 INFO L93 Difference]: Finished difference Result 61 states and 86 transitions. [2020-10-12 09:43:45,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:43:45,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-12 09:43:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:45,705 INFO L225 Difference]: With dead ends: 61 [2020-10-12 09:43:45,705 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 09:43:45,709 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 09:43:45,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 09:43:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-12 09:43:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 09:43:45,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-12 09:43:45,753 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-10-12 09:43:45,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:45,753 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-12 09:43:45,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:43:45,754 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-12 09:43:45,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 09:43:45,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:45,755 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 09:43:45,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:43:45,756 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:45,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1806235348, now seen corresponding path program 1 times [2020-10-12 09:43:45,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:45,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184368770] [2020-10-12 09:43:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:45,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:45,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:46,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:46,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 09:43:46,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:43:46,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-12 09:43:46,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:43:46,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:43:46,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 09:43:46,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:46,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:46,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:46,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:46,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:46,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:46,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:43:46,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:46,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:46,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:46,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:46,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:43:46,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184368770] [2020-10-12 09:43:46,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:46,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:43:46,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323316410] [2020-10-12 09:43:46,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:43:46,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:46,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:43:46,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:43:46,362 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-12 09:43:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:46,520 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2020-10-12 09:43:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:43:46,521 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-12 09:43:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:46,524 INFO L225 Difference]: With dead ends: 68 [2020-10-12 09:43:46,524 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 09:43:46,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:43:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 09:43:46,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2020-10-12 09:43:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 09:43:46,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-12 09:43:46,540 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 20 [2020-10-12 09:43:46,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:46,540 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-12 09:43:46,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:43:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-12 09:43:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 09:43:46,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:46,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:46,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:43:46,542 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:46,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:46,543 INFO L82 PathProgramCache]: Analyzing trace with hash -467431540, now seen corresponding path program 1 times [2020-10-12 09:43:46,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:46,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393178394] [2020-10-12 09:43:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:46,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:46,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:46,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:47,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:47,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 09:43:47,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:43:47,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-12 09:43:47,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:47,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:43:47,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:43:47,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:43:47,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:47,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:47,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:47,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:47,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:47,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:47,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:47,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:47,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:47,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:47,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:47,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:47,239 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 09:43:47,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393178394] [2020-10-12 09:43:47,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:47,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:43:47,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881795789] [2020-10-12 09:43:47,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:43:47,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:47,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:43:47,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:43:47,242 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 7 states. [2020-10-12 09:43:47,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:47,441 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2020-10-12 09:43:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:43:47,441 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-12 09:43:47,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:47,443 INFO L225 Difference]: With dead ends: 84 [2020-10-12 09:43:47,443 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 09:43:47,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:43:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 09:43:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2020-10-12 09:43:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 09:43:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-12 09:43:47,453 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2020-10-12 09:43:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:47,454 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-12 09:43:47,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:43:47,454 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-12 09:43:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:43:47,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:47,455 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] [2020-10-12 09:43:47,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:43:47,456 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:47,456 INFO L82 PathProgramCache]: Analyzing trace with hash 317446851, now seen corresponding path program 1 times [2020-10-12 09:43:47,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:47,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259659561] [2020-10-12 09:43:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:47,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:47,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:47,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:48,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:48,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 09:43:48,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:43:48,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-12 09:43:48,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:43:48,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 09:43:48,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 09:43:48,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:43:48,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:48,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:48,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:48,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:48,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:48,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:48,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:48,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:48,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:48,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:48,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 09:43:48,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259659561] [2020-10-12 09:43:48,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:48,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:43:48,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718227799] [2020-10-12 09:43:48,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:43:48,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:48,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:43:48,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:43:48,702 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 10 states. [2020-10-12 09:43:49,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:49,016 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-12 09:43:49,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:43:49,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-12 09:43:49,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:49,021 INFO L225 Difference]: With dead ends: 62 [2020-10-12 09:43:49,022 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 09:43:49,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:43:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 09:43:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2020-10-12 09:43:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 09:43:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-12 09:43:49,042 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 27 [2020-10-12 09:43:49,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:49,048 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-12 09:43:49,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:43:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-12 09:43:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:43:49,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:49,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:49,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:43:49,051 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:49,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:49,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1328564101, now seen corresponding path program 1 times [2020-10-12 09:43:49,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:49,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387823271] [2020-10-12 09:43:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:49,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:49,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 09:43:49,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:43:49,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-12 09:43:49,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:49,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:43:49,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:43:49,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:43:49,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:49,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:49,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:49,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:49,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:49,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:43:49,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:49,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:49,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:49,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:49,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:43:49,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387823271] [2020-10-12 09:43:49,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:49,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:43:49,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267889026] [2020-10-12 09:43:49,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:43:49,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:49,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:43:49,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:43:49,742 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 7 states. [2020-10-12 09:43:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:49,908 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2020-10-12 09:43:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:43:49,909 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-12 09:43:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:49,912 INFO L225 Difference]: With dead ends: 100 [2020-10-12 09:43:49,912 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 09:43:49,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:43:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 09:43:49,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2020-10-12 09:43:49,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 09:43:49,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-10-12 09:43:49,924 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 27 [2020-10-12 09:43:49,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:49,924 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-10-12 09:43:49,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:43:49,924 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-10-12 09:43:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 09:43:49,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:49,926 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] [2020-10-12 09:43:49,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:43:49,926 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:49,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1992459028, now seen corresponding path program 2 times [2020-10-12 09:43:49,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:49,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746087645] [2020-10-12 09:43:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:49,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:49,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:50,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:50,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 09:43:50,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:43:50,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 895 [2020-10-12 09:43:50,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:50,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:43:50,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:43:50,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 09:43:50,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:50,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:50,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:50,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:50,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:50,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:50,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:50,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:50,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:50,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:50,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:50,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 09:43:50,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746087645] [2020-10-12 09:43:50,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:50,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:43:50,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132321120] [2020-10-12 09:43:50,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:43:50,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:50,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:43:50,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:43:50,901 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 8 states. [2020-10-12 09:43:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:51,133 INFO L93 Difference]: Finished difference Result 142 states and 175 transitions. [2020-10-12 09:43:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:43:51,133 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-12 09:43:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:51,135 INFO L225 Difference]: With dead ends: 142 [2020-10-12 09:43:51,135 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 09:43:51,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:43:51,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 09:43:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-12 09:43:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 09:43:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-10-12 09:43:51,148 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 28 [2020-10-12 09:43:51,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:51,149 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-10-12 09:43:51,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:43:51,149 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-10-12 09:43:51,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 09:43:51,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:51,151 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:51,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:43:51,151 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:51,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:51,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1887749727, now seen corresponding path program 1 times [2020-10-12 09:43:51,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:51,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098652628] [2020-10-12 09:43:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:51,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:51,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:51,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:51,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:53,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:53,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 09:43:53,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:43:53,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2767 [2020-10-12 09:43:53,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:53,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:43:53,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:43:53,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 09:43:53,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:54,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:54,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:54,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:54,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:54,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:54,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:54,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:54,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:54,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 09:43:54,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098652628] [2020-10-12 09:43:54,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:54,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:43:54,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063978948] [2020-10-12 09:43:54,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:43:54,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:54,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:43:54,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:43:54,096 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 14 states. [2020-10-12 09:43:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:54,495 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2020-10-12 09:43:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:43:54,495 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-12 09:43:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:54,497 INFO L225 Difference]: With dead ends: 87 [2020-10-12 09:43:54,497 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 09:43:54,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:43:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 09:43:54,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2020-10-12 09:43:54,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 09:43:54,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2020-10-12 09:43:54,507 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 31 [2020-10-12 09:43:54,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:54,508 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2020-10-12 09:43:54,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:43:54,508 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2020-10-12 09:43:54,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 09:43:54,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:54,509 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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 09:43:54,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:43:54,510 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:54,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:54,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1386149215, now seen corresponding path program 3 times [2020-10-12 09:43:54,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:54,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997988312] [2020-10-12 09:43:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:54,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:54,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:54,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:55,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:55,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 09:43:55,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:43:55,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-12 09:43:55,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:55,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:43:55,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:43:55,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:43:55,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:55,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:55,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:55,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:55,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:55,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:55,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:43:55,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:55,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:55,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:55,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:55,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 09:43:55,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997988312] [2020-10-12 09:43:55,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:55,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:43:55,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554097297] [2020-10-12 09:43:55,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:43:55,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:55,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:43:55,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:43:55,578 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 8 states. [2020-10-12 09:43:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:55,814 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2020-10-12 09:43:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:43:55,815 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-12 09:43:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:55,816 INFO L225 Difference]: With dead ends: 120 [2020-10-12 09:43:55,816 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 09:43:55,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:43:55,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 09:43:55,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2020-10-12 09:43:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 09:43:55,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2020-10-12 09:43:55,828 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 31 [2020-10-12 09:43:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:55,828 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2020-10-12 09:43:55,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:43:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2020-10-12 09:43:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 09:43:55,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:55,830 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:55,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:43:55,830 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:55,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:55,830 INFO L82 PathProgramCache]: Analyzing trace with hash 823103820, now seen corresponding path program 4 times [2020-10-12 09:43:55,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:55,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963362722] [2020-10-12 09:43:55,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:55,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:55,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:55,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:57,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:57,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 09:43:57,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:43:57,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1188 [2020-10-12 09:43:57,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:57,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:43:57,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:43:57,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 09:43:57,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:57,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:57,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:57,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:57,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:57,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:57,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:43:57,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:57,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:57,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:57,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:43:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 09:43:57,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963362722] [2020-10-12 09:43:57,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:57,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:43:57,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594846082] [2020-10-12 09:43:57,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:43:57,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:57,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:43:57,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:43:57,149 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 10 states. [2020-10-12 09:43:57,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:57,553 INFO L93 Difference]: Finished difference Result 169 states and 209 transitions. [2020-10-12 09:43:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:43:57,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-12 09:43:57,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:57,555 INFO L225 Difference]: With dead ends: 169 [2020-10-12 09:43:57,555 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 09:43:57,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:43:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 09:43:57,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 72. [2020-10-12 09:43:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 09:43:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-10-12 09:43:57,566 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 32 [2020-10-12 09:43:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:57,566 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-10-12 09:43:57,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:43:57,566 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-10-12 09:43:57,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 09:43:57,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:57,568 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:43:57,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:43:57,568 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:57,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:57,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1909924306, now seen corresponding path program 2 times [2020-10-12 09:43:57,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:57,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621652628] [2020-10-12 09:43:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:57,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:57,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:57,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:57,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:58,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:58,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 09:43:58,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:43:58,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1315 [2020-10-12 09:43:58,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:58,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:43:58,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:43:58,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 09:43:58,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:58,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:43:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:58,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:58,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:43:58,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:43:58,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:43:58,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:43:58,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:43:58,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:43:58,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:43:58,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:43:58,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:43:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 09:43:58,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621652628] [2020-10-12 09:43:58,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:43:58,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:43:58,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602913492] [2020-10-12 09:43:58,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:43:58,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:43:58,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:43:58,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:43:58,967 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 8 states. [2020-10-12 09:43:59,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:43:59,185 INFO L93 Difference]: Finished difference Result 129 states and 156 transitions. [2020-10-12 09:43:59,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:43:59,185 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-12 09:43:59,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:43:59,187 INFO L225 Difference]: With dead ends: 129 [2020-10-12 09:43:59,187 INFO L226 Difference]: Without dead ends: 111 [2020-10-12 09:43:59,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:43:59,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-12 09:43:59,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2020-10-12 09:43:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 09:43:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2020-10-12 09:43:59,198 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 34 [2020-10-12 09:43:59,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:43:59,198 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2020-10-12 09:43:59,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:43:59,198 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2020-10-12 09:43:59,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 09:43:59,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:43:59,199 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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 09:43:59,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:43:59,200 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:43:59,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:43:59,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1864442885, now seen corresponding path program 2 times [2020-10-12 09:43:59,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:43:59,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151531757] [2020-10-12 09:43:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:43:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:43:59,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:59,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:59,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:43:59,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:00,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:02,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:02,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 09:44:02,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:44:02,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3483 [2020-10-12 09:44:02,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:02,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:44:02,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:02,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 09:44:02,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:44:02,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:02,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:02,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:02,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:02,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:02,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:02,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:02,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:02,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:02,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:02,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 09:44:02,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151531757] [2020-10-12 09:44:02,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:02,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:44:02,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45072608] [2020-10-12 09:44:02,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:44:02,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:02,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:44:02,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:44:02,940 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 16 states. [2020-10-12 09:44:03,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:03,476 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2020-10-12 09:44:03,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:44:03,477 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-12 09:44:03,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:03,478 INFO L225 Difference]: With dead ends: 108 [2020-10-12 09:44:03,478 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 09:44:03,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:44:03,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 09:44:03,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 91. [2020-10-12 09:44:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 09:44:03,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-10-12 09:44:03,489 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 35 [2020-10-12 09:44:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:03,490 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-10-12 09:44:03,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:44:03,490 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-10-12 09:44:03,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 09:44:03,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:03,491 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:03,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:44:03,491 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:03,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:03,492 INFO L82 PathProgramCache]: Analyzing trace with hash 129701821, now seen corresponding path program 5 times [2020-10-12 09:44:03,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:03,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631551449] [2020-10-12 09:44:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:03,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:03,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:03,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:05,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:05,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 09:44:05,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:44:05,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1506 [2020-10-12 09:44:05,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:05,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:44:05,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:05,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:44:05,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:05,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:05,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:05,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:05,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:05,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:05,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:05,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:05,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:05,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:05,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:05,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 09:44:05,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631551449] [2020-10-12 09:44:05,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:05,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:44:05,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257972301] [2020-10-12 09:44:05,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:44:05,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:05,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:44:05,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:44:05,072 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 9 states. [2020-10-12 09:44:05,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:05,336 INFO L93 Difference]: Finished difference Result 149 states and 179 transitions. [2020-10-12 09:44:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:44:05,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-12 09:44:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:05,338 INFO L225 Difference]: With dead ends: 149 [2020-10-12 09:44:05,338 INFO L226 Difference]: Without dead ends: 131 [2020-10-12 09:44:05,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:44:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-12 09:44:05,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 87. [2020-10-12 09:44:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 09:44:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2020-10-12 09:44:05,348 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 35 [2020-10-12 09:44:05,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:05,349 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2020-10-12 09:44:05,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:44:05,349 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2020-10-12 09:44:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 09:44:05,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:05,350 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:05,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:44:05,350 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:05,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:05,350 INFO L82 PathProgramCache]: Analyzing trace with hash 286559404, now seen corresponding path program 6 times [2020-10-12 09:44:05,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:05,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875140811] [2020-10-12 09:44:05,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:05,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:05,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:05,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:06,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:06,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 09:44:06,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:44:06,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1404 [2020-10-12 09:44:06,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:06,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:44:06,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:06,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 09:44:06,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:06,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:06,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:06,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:06,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:06,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:06,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:06,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:06,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:06,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:06,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:06,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:44:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 09:44:06,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875140811] [2020-10-12 09:44:06,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:06,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:44:06,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312363561] [2020-10-12 09:44:06,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:44:06,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:06,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:44:06,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:44:06,849 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand 10 states. [2020-10-12 09:44:07,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:07,197 INFO L93 Difference]: Finished difference Result 210 states and 261 transitions. [2020-10-12 09:44:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:44:07,197 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-12 09:44:07,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:07,199 INFO L225 Difference]: With dead ends: 210 [2020-10-12 09:44:07,199 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 09:44:07,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:44:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 09:44:07,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2020-10-12 09:44:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 09:44:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-10-12 09:44:07,211 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 36 [2020-10-12 09:44:07,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:07,211 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-10-12 09:44:07,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:44:07,211 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-10-12 09:44:07,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 09:44:07,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:07,212 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:07,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:44:07,212 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:07,213 INFO L82 PathProgramCache]: Analyzing trace with hash 531661618, now seen corresponding path program 3 times [2020-10-12 09:44:07,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:07,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310973061] [2020-10-12 09:44:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:07,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:07,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:07,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:07,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:08,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:08,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:44:08,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:44:08,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1762 [2020-10-12 09:44:08,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:08,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:44:08,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:08,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 09:44:08,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:44:09,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:09,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:09,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:09,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:09,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:09,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:09,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:09,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:09,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:09,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:09,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-12 09:44:09,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310973061] [2020-10-12 09:44:09,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:09,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:44:09,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136568451] [2020-10-12 09:44:09,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:44:09,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:09,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:44:09,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:44:09,081 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 9 states. [2020-10-12 09:44:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:09,345 INFO L93 Difference]: Finished difference Result 152 states and 183 transitions. [2020-10-12 09:44:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:44:09,345 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-12 09:44:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:09,346 INFO L225 Difference]: With dead ends: 152 [2020-10-12 09:44:09,347 INFO L226 Difference]: Without dead ends: 134 [2020-10-12 09:44:09,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:44:09,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-12 09:44:09,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 93. [2020-10-12 09:44:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 09:44:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2020-10-12 09:44:09,362 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 38 [2020-10-12 09:44:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:09,362 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2020-10-12 09:44:09,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:44:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2020-10-12 09:44:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 09:44:09,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:09,363 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:09,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:44:09,364 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:09,364 INFO L82 PathProgramCache]: Analyzing trace with hash 916396951, now seen corresponding path program 4 times [2020-10-12 09:44:09,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:09,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730818984] [2020-10-12 09:44:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:09,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:09,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:09,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:10,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:10,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:10,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:14,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:14,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 09:44:14,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:44:14,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4662 [2020-10-12 09:44:14,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:14,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:44:14,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:14,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 09:44:14,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:14,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:14,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:14,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:14,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:14,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:14,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:44:14,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:14,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-12 09:44:14,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730818984] [2020-10-12 09:44:14,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:14,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:44:14,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562215844] [2020-10-12 09:44:14,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:44:14,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:14,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:44:14,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:44:14,357 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand 17 states. [2020-10-12 09:44:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:14,952 INFO L93 Difference]: Finished difference Result 122 states and 144 transitions. [2020-10-12 09:44:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:44:14,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-12 09:44:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:14,954 INFO L225 Difference]: With dead ends: 122 [2020-10-12 09:44:14,954 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 09:44:14,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:44:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 09:44:14,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2020-10-12 09:44:14,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 09:44:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2020-10-12 09:44:14,968 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 39 [2020-10-12 09:44:14,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:14,969 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2020-10-12 09:44:14,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:44:14,970 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2020-10-12 09:44:14,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 09:44:14,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:14,970 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:14,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:44:14,971 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:14,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:14,971 INFO L82 PathProgramCache]: Analyzing trace with hash -742777217, now seen corresponding path program 3 times [2020-10-12 09:44:14,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:14,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712605225] [2020-10-12 09:44:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:14,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:14,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:15,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:15,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:15,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:16,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:16,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 09:44:16,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:44:16,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1489 [2020-10-12 09:44:16,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:16,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:44:16,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:16,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:44:16,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:16,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:16,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:16,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:16,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:16,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:16,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:16,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:16,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:16,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:16,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:16,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-12 09:44:16,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712605225] [2020-10-12 09:44:16,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:16,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:44:16,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459492176] [2020-10-12 09:44:16,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:44:16,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:16,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:44:16,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:44:16,529 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand 9 states. [2020-10-12 09:44:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:16,809 INFO L93 Difference]: Finished difference Result 167 states and 203 transitions. [2020-10-12 09:44:16,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:44:16,809 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-12 09:44:16,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:16,811 INFO L225 Difference]: With dead ends: 167 [2020-10-12 09:44:16,811 INFO L226 Difference]: Without dead ends: 149 [2020-10-12 09:44:16,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:44:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-12 09:44:16,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 114. [2020-10-12 09:44:16,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-12 09:44:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 138 transitions. [2020-10-12 09:44:16,830 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 138 transitions. Word has length 39 [2020-10-12 09:44:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:16,830 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 138 transitions. [2020-10-12 09:44:16,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:44:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 138 transitions. [2020-10-12 09:44:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 09:44:16,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:16,831 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:16,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:44:16,832 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:16,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:16,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1734045401, now seen corresponding path program 7 times [2020-10-12 09:44:16,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:16,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213506209] [2020-10-12 09:44:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:16,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:16,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:16,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:18,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:18,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 09:44:18,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:44:18,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1247 [2020-10-12 09:44:18,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:18,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:44:18,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:18,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:44:18,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:18,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:18,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:18,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:18,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:18,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:18,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:18,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:18,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:18,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:18,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:18,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-12 09:44:18,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213506209] [2020-10-12 09:44:18,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:18,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:44:18,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067246218] [2020-10-12 09:44:18,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:44:18,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:18,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:44:18,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:44:18,155 INFO L87 Difference]: Start difference. First operand 114 states and 138 transitions. Second operand 10 states. [2020-10-12 09:44:18,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:18,505 INFO L93 Difference]: Finished difference Result 182 states and 219 transitions. [2020-10-12 09:44:18,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:44:18,505 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-12 09:44:18,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:18,507 INFO L225 Difference]: With dead ends: 182 [2020-10-12 09:44:18,507 INFO L226 Difference]: Without dead ends: 164 [2020-10-12 09:44:18,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:44:18,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-12 09:44:18,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 108. [2020-10-12 09:44:18,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-12 09:44:18,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 132 transitions. [2020-10-12 09:44:18,520 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 132 transitions. Word has length 39 [2020-10-12 09:44:18,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:18,520 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 132 transitions. [2020-10-12 09:44:18,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:44:18,521 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 132 transitions. [2020-10-12 09:44:18,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 09:44:18,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:18,521 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:18,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:44:18,522 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:18,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:18,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1121398540, now seen corresponding path program 8 times [2020-10-12 09:44:18,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:18,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823754958] [2020-10-12 09:44:18,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:18,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:18,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:18,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:19,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:19,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 09:44:19,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:44:19,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1225 [2020-10-12 09:44:19,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:19,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:44:19,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:19,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 09:44:19,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:19,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:19,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:19,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:19,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:19,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:19,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:19,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:19,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:19,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:19,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:19,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-12 09:44:19,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823754958] [2020-10-12 09:44:19,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:19,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:44:19,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815460321] [2020-10-12 09:44:19,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:44:19,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:19,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:44:19,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:44:19,847 INFO L87 Difference]: Start difference. First operand 108 states and 132 transitions. Second operand 11 states. [2020-10-12 09:44:20,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:20,276 INFO L93 Difference]: Finished difference Result 255 states and 317 transitions. [2020-10-12 09:44:20,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:44:20,277 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-12 09:44:20,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:20,279 INFO L225 Difference]: With dead ends: 255 [2020-10-12 09:44:20,280 INFO L226 Difference]: Without dead ends: 164 [2020-10-12 09:44:20,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:44:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-12 09:44:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2020-10-12 09:44:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-12 09:44:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2020-10-12 09:44:20,294 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 40 [2020-10-12 09:44:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:20,294 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2020-10-12 09:44:20,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:44:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2020-10-12 09:44:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 09:44:20,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:20,295 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:20,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:44:20,296 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:20,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1946307474, now seen corresponding path program 5 times [2020-10-12 09:44:20,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:20,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838437359] [2020-10-12 09:44:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:20,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:20,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:20,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:20,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:21,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:21,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 09:44:21,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:44:21,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1176 [2020-10-12 09:44:21,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:21,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:44:21,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:21,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 09:44:21,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:21,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:21,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:21,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:21,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:21,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:21,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:21,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:21,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:21,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:21,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:21,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-12 09:44:21,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838437359] [2020-10-12 09:44:21,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:21,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:44:21,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071389698] [2020-10-12 09:44:21,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:44:21,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:21,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:44:21,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:44:21,551 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand 10 states. [2020-10-12 09:44:21,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:21,898 INFO L93 Difference]: Finished difference Result 183 states and 221 transitions. [2020-10-12 09:44:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:44:21,899 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-12 09:44:21,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:21,901 INFO L225 Difference]: With dead ends: 183 [2020-10-12 09:44:21,901 INFO L226 Difference]: Without dead ends: 165 [2020-10-12 09:44:21,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:44:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-12 09:44:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 114. [2020-10-12 09:44:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-12 09:44:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 138 transitions. [2020-10-12 09:44:21,916 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 138 transitions. Word has length 42 [2020-10-12 09:44:21,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:21,916 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 138 transitions. [2020-10-12 09:44:21,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:44:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 138 transitions. [2020-10-12 09:44:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:44:21,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:21,917 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:21,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:44:21,917 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:21,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:21,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1620409037, now seen corresponding path program 6 times [2020-10-12 09:44:21,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:21,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969915912] [2020-10-12 09:44:21,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:21,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:21,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:22,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:22,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:22,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:22,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:23,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:26,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:26,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 09:44:26,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:44:26,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:44:26,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:26,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:44:26,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:26,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 09:44:26,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:27,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:27,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:27,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:27,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:27,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:27,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:27,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:27,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:27,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:27,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:27,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-12 09:44:27,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969915912] [2020-10-12 09:44:27,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:27,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:44:27,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192544160] [2020-10-12 09:44:27,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:44:27,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:27,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:44:27,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:44:27,296 INFO L87 Difference]: Start difference. First operand 114 states and 138 transitions. Second operand 19 states. [2020-10-12 09:44:28,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:28,429 INFO L93 Difference]: Finished difference Result 162 states and 193 transitions. [2020-10-12 09:44:28,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:44:28,430 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-12 09:44:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:28,431 INFO L225 Difference]: With dead ends: 162 [2020-10-12 09:44:28,432 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 09:44:28,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:44:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 09:44:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 124. [2020-10-12 09:44:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-12 09:44:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 149 transitions. [2020-10-12 09:44:28,449 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 149 transitions. Word has length 43 [2020-10-12 09:44:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:28,449 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 149 transitions. [2020-10-12 09:44:28,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:44:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 149 transitions. [2020-10-12 09:44:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:44:28,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:28,450 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:28,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:44:28,451 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:28,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:28,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1641049627, now seen corresponding path program 7 times [2020-10-12 09:44:28,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:28,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585931091] [2020-10-12 09:44:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:28,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:28,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:28,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:28,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:28,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:29,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:29,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 09:44:29,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:44:29,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1311 [2020-10-12 09:44:29,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:44:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:29,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:44:29,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:29,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:29,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:29,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:29,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:29,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:29,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:29,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:29,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:29,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:29,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:29,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-12 09:44:29,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585931091] [2020-10-12 09:44:29,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:29,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:44:29,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371933396] [2020-10-12 09:44:29,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:44:29,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:29,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:44:29,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:44:29,838 INFO L87 Difference]: Start difference. First operand 124 states and 149 transitions. Second operand 10 states. [2020-10-12 09:44:30,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:30,293 INFO L93 Difference]: Finished difference Result 196 states and 236 transitions. [2020-10-12 09:44:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:44:30,293 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-12 09:44:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:30,295 INFO L225 Difference]: With dead ends: 196 [2020-10-12 09:44:30,296 INFO L226 Difference]: Without dead ends: 178 [2020-10-12 09:44:30,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:44:30,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-12 09:44:30,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 126. [2020-10-12 09:44:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-12 09:44:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2020-10-12 09:44:30,325 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 43 [2020-10-12 09:44:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:30,325 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2020-10-12 09:44:30,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:44:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2020-10-12 09:44:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:44:30,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:30,327 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:30,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:44:30,327 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:30,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1839263755, now seen corresponding path program 9 times [2020-10-12 09:44:30,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:30,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737457656] [2020-10-12 09:44:30,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:30,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:30,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:30,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:32,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:32,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 09:44:32,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:44:32,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1904 [2020-10-12 09:44:32,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:32,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:44:32,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:32,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:44:32,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:32,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:32,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:32,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:32,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:32,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:32,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:32,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:32,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:32,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:32,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:32,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-12 09:44:32,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737457656] [2020-10-12 09:44:32,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:32,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:44:32,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086814540] [2020-10-12 09:44:32,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:44:32,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:44:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:44:32,328 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand 11 states. [2020-10-12 09:44:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:32,751 INFO L93 Difference]: Finished difference Result 216 states and 260 transitions. [2020-10-12 09:44:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:44:32,752 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-12 09:44:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:32,753 INFO L225 Difference]: With dead ends: 216 [2020-10-12 09:44:32,753 INFO L226 Difference]: Without dead ends: 198 [2020-10-12 09:44:32,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:44:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-12 09:44:32,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 118. [2020-10-12 09:44:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-12 09:44:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 143 transitions. [2020-10-12 09:44:32,768 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 143 transitions. Word has length 43 [2020-10-12 09:44:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:32,769 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 143 transitions. [2020-10-12 09:44:32,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:44:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 143 transitions. [2020-10-12 09:44:32,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 09:44:32,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:32,770 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:32,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:44:32,770 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:32,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:32,770 INFO L82 PathProgramCache]: Analyzing trace with hash 535967852, now seen corresponding path program 10 times [2020-10-12 09:44:32,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:32,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005895081] [2020-10-12 09:44:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:32,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:32,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:32,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:34,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:34,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 09:44:34,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:44:34,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1629 [2020-10-12 09:44:34,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:34,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:44:34,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:34,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 09:44:34,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:34,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:34,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:34,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:34,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:34,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:34,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:34,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:34,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:34,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:34,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:34,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-12 09:44:34,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005895081] [2020-10-12 09:44:34,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:34,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:44:34,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110829334] [2020-10-12 09:44:34,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:44:34,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:34,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:44:34,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:44:34,515 INFO L87 Difference]: Start difference. First operand 118 states and 143 transitions. Second operand 13 states. [2020-10-12 09:44:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:35,007 INFO L93 Difference]: Finished difference Result 290 states and 359 transitions. [2020-10-12 09:44:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:44:35,008 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-10-12 09:44:35,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:35,009 INFO L225 Difference]: With dead ends: 290 [2020-10-12 09:44:35,009 INFO L226 Difference]: Without dead ends: 191 [2020-10-12 09:44:35,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:44:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-12 09:44:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 122. [2020-10-12 09:44:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-12 09:44:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2020-10-12 09:44:35,024 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 44 [2020-10-12 09:44:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:35,024 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2020-10-12 09:44:35,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:44:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2020-10-12 09:44:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 09:44:35,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:35,025 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:35,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:44:35,025 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:35,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:35,026 INFO L82 PathProgramCache]: Analyzing trace with hash -118101352, now seen corresponding path program 4 times [2020-10-12 09:44:35,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:35,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759123660] [2020-10-12 09:44:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:35,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:35,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:35,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:35,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:35,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:35,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:36,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:36,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 09:44:36,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:44:36,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1403 [2020-10-12 09:44:36,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:36,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:44:36,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:36,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 09:44:36,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:36,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:36,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:36,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:36,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:36,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:36,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:36,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:36,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:36,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:36,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:36,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-12 09:44:36,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759123660] [2020-10-12 09:44:36,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:36,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:44:36,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455130884] [2020-10-12 09:44:36,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:44:36,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:36,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:44:36,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:44:36,511 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand 10 states. [2020-10-12 09:44:36,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:36,853 INFO L93 Difference]: Finished difference Result 195 states and 238 transitions. [2020-10-12 09:44:36,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:44:36,854 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-12 09:44:36,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:36,856 INFO L225 Difference]: With dead ends: 195 [2020-10-12 09:44:36,856 INFO L226 Difference]: Without dead ends: 177 [2020-10-12 09:44:36,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:44:36,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-12 09:44:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-12 09:44:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-12 09:44:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 164 transitions. [2020-10-12 09:44:36,875 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 164 transitions. Word has length 46 [2020-10-12 09:44:36,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:36,875 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 164 transitions. [2020-10-12 09:44:36,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:44:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 164 transitions. [2020-10-12 09:44:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 09:44:36,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:36,876 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:36,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:44:36,876 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:36,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1936246030, now seen corresponding path program 8 times [2020-10-12 09:44:36,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:36,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251903823] [2020-10-12 09:44:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:36,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:36,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:36,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:36,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:38,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:38,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 09:44:38,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:44:38,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1648 [2020-10-12 09:44:38,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:38,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:44:38,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:38,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 09:44:38,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:38,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:38,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:38,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:38,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:38,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:38,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:38,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:38,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:38,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:38,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:38,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-12 09:44:38,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251903823] [2020-10-12 09:44:38,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:38,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:44:38,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050638815] [2020-10-12 09:44:38,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:44:38,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:38,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:44:38,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:44:38,615 INFO L87 Difference]: Start difference. First operand 135 states and 164 transitions. Second operand 11 states. [2020-10-12 09:44:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:39,012 INFO L93 Difference]: Finished difference Result 218 states and 263 transitions. [2020-10-12 09:44:39,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:44:39,013 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-12 09:44:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:39,015 INFO L225 Difference]: With dead ends: 218 [2020-10-12 09:44:39,015 INFO L226 Difference]: Without dead ends: 200 [2020-10-12 09:44:39,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:44:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-12 09:44:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 137. [2020-10-12 09:44:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 09:44:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 166 transitions. [2020-10-12 09:44:39,034 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 166 transitions. Word has length 46 [2020-10-12 09:44:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:39,034 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 166 transitions. [2020-10-12 09:44:39,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:44:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 166 transitions. [2020-10-12 09:44:39,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 09:44:39,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:39,035 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:39,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:44:39,036 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:39,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1545201457, now seen corresponding path program 9 times [2020-10-12 09:44:39,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:39,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264256218] [2020-10-12 09:44:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:39,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:39,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:39,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:40,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:40,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:41,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:41,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:42,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:44,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:44,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:44:44,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:44:44,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:44:44,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:44,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:44:44,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:44,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 09:44:44,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:44,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:44,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:44,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:44,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:44,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:44,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:44:44,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:44,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:44,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:44,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-12 09:44:44,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264256218] [2020-10-12 09:44:44,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:44,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:44:44,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314617908] [2020-10-12 09:44:44,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:44:44,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:44,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:44:44,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:44:44,814 INFO L87 Difference]: Start difference. First operand 137 states and 166 transitions. Second operand 20 states. [2020-10-12 09:44:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:46,228 INFO L93 Difference]: Finished difference Result 194 states and 235 transitions. [2020-10-12 09:44:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:44:46,229 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-12 09:44:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:46,230 INFO L225 Difference]: With dead ends: 194 [2020-10-12 09:44:46,231 INFO L226 Difference]: Without dead ends: 192 [2020-10-12 09:44:46,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:44:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-12 09:44:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 129. [2020-10-12 09:44:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 09:44:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2020-10-12 09:44:46,262 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 47 [2020-10-12 09:44:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:46,262 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2020-10-12 09:44:46,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:44:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2020-10-12 09:44:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 09:44:46,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:46,264 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:46,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:44:46,264 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:46,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:46,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1685415863, now seen corresponding path program 10 times [2020-10-12 09:44:46,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:46,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652412652] [2020-10-12 09:44:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:46,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:46,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:46,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:46,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:46,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:48,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:48,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:44:48,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:44:48,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2233 [2020-10-12 09:44:48,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:48,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:44:48,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:48,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:44:48,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:48,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:48,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:48,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:48,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:48,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:48,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:48,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:48,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:48,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:48,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:48,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-12 09:44:48,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652412652] [2020-10-12 09:44:48,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:48,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:44:48,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188145630] [2020-10-12 09:44:48,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:44:48,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:48,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:44:48,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:44:48,610 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 11 states. [2020-10-12 09:44:49,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:49,033 INFO L93 Difference]: Finished difference Result 220 states and 260 transitions. [2020-10-12 09:44:49,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:44:49,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-12 09:44:49,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:49,036 INFO L225 Difference]: With dead ends: 220 [2020-10-12 09:44:49,036 INFO L226 Difference]: Without dead ends: 202 [2020-10-12 09:44:49,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:44:49,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-12 09:44:49,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 129. [2020-10-12 09:44:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 09:44:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2020-10-12 09:44:49,059 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 47 [2020-10-12 09:44:49,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:49,059 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2020-10-12 09:44:49,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:44:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2020-10-12 09:44:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 09:44:49,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:49,060 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:49,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:44:49,061 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1411187951, now seen corresponding path program 11 times [2020-10-12 09:44:49,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:49,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046792602] [2020-10-12 09:44:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:49,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:49,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:49,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:51,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:51,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:44:51,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:44:51,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2045 [2020-10-12 09:44:51,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:51,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:44:51,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:51,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:44:51,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:51,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:51,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:51,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:51,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:51,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:51,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:51,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:51,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-12 09:44:51,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046792602] [2020-10-12 09:44:51,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:51,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:44:51,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683557413] [2020-10-12 09:44:51,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:44:51,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:51,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:44:51,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:44:51,207 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 12 states. [2020-10-12 09:44:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:51,673 INFO L93 Difference]: Finished difference Result 242 states and 290 transitions. [2020-10-12 09:44:51,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:44:51,674 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-12 09:44:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:51,677 INFO L225 Difference]: With dead ends: 242 [2020-10-12 09:44:51,677 INFO L226 Difference]: Without dead ends: 224 [2020-10-12 09:44:51,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:44:51,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-12 09:44:51,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 131. [2020-10-12 09:44:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 09:44:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2020-10-12 09:44:51,697 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 47 [2020-10-12 09:44:51,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:51,697 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2020-10-12 09:44:51,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:44:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2020-10-12 09:44:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 09:44:51,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:51,698 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:51,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:44:51,698 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:51,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:51,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2143344278, now seen corresponding path program 11 times [2020-10-12 09:44:51,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:51,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303653662] [2020-10-12 09:44:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:51,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:51,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:51,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:51,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:51,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:51,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:53,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:53,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 09:44:53,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:44:53,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1710 [2020-10-12 09:44:53,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:53,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:44:53,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:53,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 09:44:53,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:53,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:53,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:53,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:53,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:53,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:53,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:53,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:53,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-12 09:44:53,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303653662] [2020-10-12 09:44:53,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:53,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:44:53,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156363690] [2020-10-12 09:44:53,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:44:53,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:53,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:44:53,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:44:53,493 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand 11 states. [2020-10-12 09:44:53,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:53,898 INFO L93 Difference]: Finished difference Result 216 states and 255 transitions. [2020-10-12 09:44:53,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:44:53,899 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-12 09:44:53,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:53,901 INFO L225 Difference]: With dead ends: 216 [2020-10-12 09:44:53,901 INFO L226 Difference]: Without dead ends: 198 [2020-10-12 09:44:53,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:44:53,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-12 09:44:53,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 131. [2020-10-12 09:44:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 09:44:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2020-10-12 09:44:53,925 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 48 [2020-10-12 09:44:53,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:53,925 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2020-10-12 09:44:53,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:44:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2020-10-12 09:44:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 09:44:53,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:53,925 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:53,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:44:53,926 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:53,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1336969104, now seen corresponding path program 12 times [2020-10-12 09:44:53,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:53,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542026228] [2020-10-12 09:44:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:53,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:53,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:53,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:53,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:55,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:55,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 09:44:55,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:44:55,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1859 [2020-10-12 09:44:55,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:55,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:44:55,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:55,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 09:44:55,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:55,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:55,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:55,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:55,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:55,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:55,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:44:55,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:55,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:55,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:55,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:55,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-12 09:44:55,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542026228] [2020-10-12 09:44:55,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:55,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:44:55,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301771082] [2020-10-12 09:44:55,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:44:55,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:55,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:44:55,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:44:55,887 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand 12 states. [2020-10-12 09:44:56,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:56,377 INFO L93 Difference]: Finished difference Result 252 states and 299 transitions. [2020-10-12 09:44:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:44:56,378 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-12 09:44:56,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:56,380 INFO L225 Difference]: With dead ends: 252 [2020-10-12 09:44:56,380 INFO L226 Difference]: Without dead ends: 234 [2020-10-12 09:44:56,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:44:56,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-12 09:44:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 131. [2020-10-12 09:44:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 09:44:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2020-10-12 09:44:56,405 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 48 [2020-10-12 09:44:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:56,406 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2020-10-12 09:44:56,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:44:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2020-10-12 09:44:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 09:44:56,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:56,407 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:56,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:44:56,407 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:56,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:56,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1974744987, now seen corresponding path program 5 times [2020-10-12 09:44:56,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:56,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623371865] [2020-10-12 09:44:56,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:56,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:56,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:56,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:56,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:56,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:56,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:56,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:58,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:58,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:44:58,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:44:58,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1633 [2020-10-12 09:44:58,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:58,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:44:58,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:44:58,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:44:58,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:58,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:44:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:58,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:58,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:44:58,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:44:58,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:44:58,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:44:58,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:44:58,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:44:58,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:44:58,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:44:58,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:44:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-12 09:44:58,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623371865] [2020-10-12 09:44:58,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:44:58,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:44:58,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842422678] [2020-10-12 09:44:58,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:44:58,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:44:58,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:44:58,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:44:58,128 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand 11 states. [2020-10-12 09:44:58,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:44:58,533 INFO L93 Difference]: Finished difference Result 210 states and 251 transitions. [2020-10-12 09:44:58,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:44:58,534 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-10-12 09:44:58,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:44:58,535 INFO L225 Difference]: With dead ends: 210 [2020-10-12 09:44:58,535 INFO L226 Difference]: Without dead ends: 192 [2020-10-12 09:44:58,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:44:58,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-12 09:44:58,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 143. [2020-10-12 09:44:58,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 09:44:58,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 172 transitions. [2020-10-12 09:44:58,579 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 172 transitions. Word has length 49 [2020-10-12 09:44:58,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:44:58,583 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 172 transitions. [2020-10-12 09:44:58,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:44:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 172 transitions. [2020-10-12 09:44:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 09:44:58,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:44:58,585 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:44:58,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:44:58,588 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:44:58,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:44:58,588 INFO L82 PathProgramCache]: Analyzing trace with hash 156600309, now seen corresponding path program 13 times [2020-10-12 09:44:58,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:44:58,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519773923] [2020-10-12 09:44:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:44:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:44:58,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:58,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:58,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:58,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:44:58,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:00,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:00,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:45:00,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:45:00,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2208 [2020-10-12 09:45:00,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:00,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:45:00,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:00,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:45:00,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:00,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:00,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:00,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:00,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:00,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:00,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:00,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:00,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:00,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:00,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:00,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-12 09:45:00,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519773923] [2020-10-12 09:45:00,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:00,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:45:00,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109806644] [2020-10-12 09:45:00,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:45:00,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:00,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:45:00,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:45:00,913 INFO L87 Difference]: Start difference. First operand 143 states and 172 transitions. Second operand 12 states. [2020-10-12 09:45:01,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:01,404 INFO L93 Difference]: Finished difference Result 255 states and 301 transitions. [2020-10-12 09:45:01,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:45:01,405 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-12 09:45:01,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:01,407 INFO L225 Difference]: With dead ends: 255 [2020-10-12 09:45:01,407 INFO L226 Difference]: Without dead ends: 237 [2020-10-12 09:45:01,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:45:01,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-12 09:45:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 143. [2020-10-12 09:45:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 09:45:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 172 transitions. [2020-10-12 09:45:01,432 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 172 transitions. Word has length 49 [2020-10-12 09:45:01,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:01,433 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 172 transitions. [2020-10-12 09:45:01,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:45:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 172 transitions. [2020-10-12 09:45:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 09:45:01,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:01,435 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:01,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:45:01,435 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:01,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash 732671183, now seen corresponding path program 12 times [2020-10-12 09:45:01,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:01,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670341376] [2020-10-12 09:45:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:01,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:01,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:01,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:03,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:03,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:45:03,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:45:03,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2422 [2020-10-12 09:45:03,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:03,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:45:03,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:03,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:45:03,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:03,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:03,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:03,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:03,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:03,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:03,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:03,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:03,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:03,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:03,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:03,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-12 09:45:03,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670341376] [2020-10-12 09:45:03,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:03,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:45:03,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517410841] [2020-10-12 09:45:03,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:45:03,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:03,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:45:03,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:45:03,981 INFO L87 Difference]: Start difference. First operand 143 states and 172 transitions. Second operand 13 states. [2020-10-12 09:45:04,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:04,532 INFO L93 Difference]: Finished difference Result 374 states and 457 transitions. [2020-10-12 09:45:04,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:45:04,533 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-12 09:45:04,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:04,535 INFO L225 Difference]: With dead ends: 374 [2020-10-12 09:45:04,535 INFO L226 Difference]: Without dead ends: 252 [2020-10-12 09:45:04,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:45:04,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-12 09:45:04,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 146. [2020-10-12 09:45:04,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 09:45:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2020-10-12 09:45:04,558 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 49 [2020-10-12 09:45:04,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:04,558 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2020-10-12 09:45:04,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:45:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2020-10-12 09:45:04,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 09:45:04,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:04,560 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:04,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:45:04,560 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:04,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:04,560 INFO L82 PathProgramCache]: Analyzing trace with hash -499604618, now seen corresponding path program 14 times [2020-10-12 09:45:04,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:04,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719957529] [2020-10-12 09:45:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:04,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:04,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:04,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:04,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:04,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:04,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:06,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:06,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 09:45:06,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:45:06,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2216 [2020-10-12 09:45:06,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:06,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:45:06,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:06,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 09:45:06,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:06,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:06,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:06,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:06,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:06,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:06,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:06,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:06,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:06,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:06,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:06,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-12 09:45:06,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719957529] [2020-10-12 09:45:06,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:06,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:45:06,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414290143] [2020-10-12 09:45:06,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:45:06,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:06,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:45:06,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:45:06,880 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand 12 states. [2020-10-12 09:45:07,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:07,362 INFO L93 Difference]: Finished difference Result 247 states and 292 transitions. [2020-10-12 09:45:07,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:45:07,363 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-12 09:45:07,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:07,365 INFO L225 Difference]: With dead ends: 247 [2020-10-12 09:45:07,365 INFO L226 Difference]: Without dead ends: 229 [2020-10-12 09:45:07,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:45:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-12 09:45:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 146. [2020-10-12 09:45:07,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 09:45:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2020-10-12 09:45:07,401 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 52 [2020-10-12 09:45:07,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:07,401 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2020-10-12 09:45:07,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:45:07,401 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2020-10-12 09:45:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 09:45:07,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:07,402 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:07,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:45:07,402 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:07,404 INFO L82 PathProgramCache]: Analyzing trace with hash 698758864, now seen corresponding path program 15 times [2020-10-12 09:45:07,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:07,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461992637] [2020-10-12 09:45:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:07,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:07,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:07,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:07,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:10,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:10,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 09:45:10,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:45:10,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2955 [2020-10-12 09:45:10,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:45:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 09:45:10,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:10,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:10,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:10,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:10,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:10,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:10,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:45:10,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:10,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-12 09:45:10,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461992637] [2020-10-12 09:45:10,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:10,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:45:10,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101166642] [2020-10-12 09:45:10,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:45:10,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:10,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:45:10,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:45:10,477 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand 13 states. [2020-10-12 09:45:11,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:11,034 INFO L93 Difference]: Finished difference Result 272 states and 325 transitions. [2020-10-12 09:45:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:45:11,035 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-12 09:45:11,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:11,036 INFO L225 Difference]: With dead ends: 272 [2020-10-12 09:45:11,036 INFO L226 Difference]: Without dead ends: 254 [2020-10-12 09:45:11,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:45:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-12 09:45:11,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 146. [2020-10-12 09:45:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 09:45:11,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2020-10-12 09:45:11,070 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 52 [2020-10-12 09:45:11,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:11,070 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2020-10-12 09:45:11,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:45:11,070 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2020-10-12 09:45:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:45:11,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:11,071 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:11,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:45:11,071 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:11,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1167781193, now seen corresponding path program 16 times [2020-10-12 09:45:11,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:11,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078344651] [2020-10-12 09:45:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:11,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:11,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:11,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:11,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:11,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:11,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:11,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:13,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:13,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 09:45:13,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:45:13,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2424 [2020-10-12 09:45:13,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:13,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:45:13,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:13,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:45:13,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:13,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:13,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:13,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:13,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:13,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:13,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:13,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:13,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:13,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:13,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:13,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-12 09:45:13,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078344651] [2020-10-12 09:45:13,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:13,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:45:13,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856744227] [2020-10-12 09:45:13,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:45:13,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:13,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:45:13,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:45:13,594 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand 12 states. [2020-10-12 09:45:14,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:14,089 INFO L93 Difference]: Finished difference Result 239 states and 283 transitions. [2020-10-12 09:45:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:45:14,090 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-12 09:45:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:14,092 INFO L225 Difference]: With dead ends: 239 [2020-10-12 09:45:14,092 INFO L226 Difference]: Without dead ends: 221 [2020-10-12 09:45:14,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:45:14,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-12 09:45:14,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 146. [2020-10-12 09:45:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 09:45:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2020-10-12 09:45:14,135 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 53 [2020-10-12 09:45:14,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:14,135 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2020-10-12 09:45:14,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:45:14,135 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2020-10-12 09:45:14,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:45:14,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:14,136 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:14,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:45:14,137 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:14,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:14,137 INFO L82 PathProgramCache]: Analyzing trace with hash -353127279, now seen corresponding path program 17 times [2020-10-12 09:45:14,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:14,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943552550] [2020-10-12 09:45:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:14,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:14,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:14,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:14,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:14,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:17,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:17,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 09:45:17,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:45:17,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3024 [2020-10-12 09:45:17,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:17,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:45:17,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:17,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:45:17,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:17,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:17,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:17,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:17,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:17,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:17,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:17,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:17,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-12 09:45:17,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943552550] [2020-10-12 09:45:17,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:17,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:45:17,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12400392] [2020-10-12 09:45:17,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:45:17,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:17,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:45:17,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:45:17,284 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand 13 states. [2020-10-12 09:45:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:17,842 INFO L93 Difference]: Finished difference Result 281 states and 333 transitions. [2020-10-12 09:45:17,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:45:17,843 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-12 09:45:17,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:17,845 INFO L225 Difference]: With dead ends: 281 [2020-10-12 09:45:17,845 INFO L226 Difference]: Without dead ends: 263 [2020-10-12 09:45:17,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:45:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-12 09:45:17,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 146. [2020-10-12 09:45:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 09:45:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2020-10-12 09:45:17,882 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 53 [2020-10-12 09:45:17,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:17,883 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2020-10-12 09:45:17,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:45:17,883 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2020-10-12 09:45:17,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:45:17,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:17,884 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:17,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:45:17,885 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:17,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:17,885 INFO L82 PathProgramCache]: Analyzing trace with hash -799798549, now seen corresponding path program 13 times [2020-10-12 09:45:17,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:17,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667216204] [2020-10-12 09:45:17,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:17,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:17,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:17,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:21,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:21,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 09:45:21,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:45:21,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3526 [2020-10-12 09:45:21,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:21,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:45:21,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:21,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:45:21,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:21,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:21,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:21,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:21,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:21,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:21,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:45:21,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:21,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:21,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:21,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:21,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-12 09:45:21,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667216204] [2020-10-12 09:45:21,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:21,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:45:21,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840966383] [2020-10-12 09:45:21,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:45:21,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:21,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:45:21,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:45:21,550 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand 14 states. [2020-10-12 09:45:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:22,182 INFO L93 Difference]: Finished difference Result 390 states and 479 transitions. [2020-10-12 09:45:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:45:22,183 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-12 09:45:22,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:22,185 INFO L225 Difference]: With dead ends: 390 [2020-10-12 09:45:22,185 INFO L226 Difference]: Without dead ends: 267 [2020-10-12 09:45:22,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:45:22,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-12 09:45:22,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 152. [2020-10-12 09:45:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-12 09:45:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2020-10-12 09:45:22,234 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 53 [2020-10-12 09:45:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:22,235 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2020-10-12 09:45:22,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:45:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2020-10-12 09:45:22,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 09:45:22,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:22,236 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:22,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 09:45:22,237 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:22,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1988073732, now seen corresponding path program 6 times [2020-10-12 09:45:22,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:22,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255270677] [2020-10-12 09:45:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:22,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:22,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:22,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:22,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:22,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:22,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:22,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:22,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:25,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:25,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 09:45:25,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:45:25,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2828 [2020-10-12 09:45:25,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:25,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:45:25,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:25,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:45:25,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:25,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:25,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:25,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:25,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:25,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:25,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:25,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:25,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:25,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:25,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:25,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:45:25,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255270677] [2020-10-12 09:45:25,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:25,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:45:25,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214729138] [2020-10-12 09:45:25,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:45:25,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:25,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:45:25,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:45:25,182 INFO L87 Difference]: Start difference. First operand 152 states and 181 transitions. Second operand 13 states. [2020-10-12 09:45:25,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:25,374 INFO L93 Difference]: Finished difference Result 282 states and 340 transitions. [2020-10-12 09:45:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:45:25,375 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-12 09:45:25,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:25,376 INFO L225 Difference]: With dead ends: 282 [2020-10-12 09:45:25,376 INFO L226 Difference]: Without dead ends: 155 [2020-10-12 09:45:25,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:45:25,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-12 09:45:25,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-10-12 09:45:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 09:45:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2020-10-12 09:45:25,414 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 56 [2020-10-12 09:45:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:25,414 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2020-10-12 09:45:25,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:45:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2020-10-12 09:45:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 09:45:25,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:25,415 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:25,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 09:45:25,415 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:25,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:25,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1395851810, now seen corresponding path program 7 times [2020-10-12 09:45:25,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:25,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116096570] [2020-10-12 09:45:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:25,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:25,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:25,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:26,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:26,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:26,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:26,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:26,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:29,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:29,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 09:45:29,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:45:29,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4032 [2020-10-12 09:45:29,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:29,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:45:29,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:29,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:45:29,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:29,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:29,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:29,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:29,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:29,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:29,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:29,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:29,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:29,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:29,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:29,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:45:29,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116096570] [2020-10-12 09:45:29,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:29,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:45:29,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268511057] [2020-10-12 09:45:29,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:45:29,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:29,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:45:29,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:45:29,581 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand 14 states. [2020-10-12 09:45:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:29,711 INFO L93 Difference]: Finished difference Result 284 states and 342 transitions. [2020-10-12 09:45:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:45:29,712 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-10-12 09:45:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:29,713 INFO L225 Difference]: With dead ends: 284 [2020-10-12 09:45:29,714 INFO L226 Difference]: Without dead ends: 157 [2020-10-12 09:45:29,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:45:29,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-12 09:45:29,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-12 09:45:29,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-12 09:45:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 185 transitions. [2020-10-12 09:45:29,751 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 185 transitions. Word has length 58 [2020-10-12 09:45:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:29,751 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 185 transitions. [2020-10-12 09:45:29,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:45:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 185 transitions. [2020-10-12 09:45:29,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 09:45:29,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:29,753 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:29,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 09:45:29,753 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash 793732160, now seen corresponding path program 8 times [2020-10-12 09:45:29,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:29,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418841324] [2020-10-12 09:45:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:29,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:29,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:29,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:29,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:29,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:29,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:29,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:29,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:33,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:33,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 09:45:33,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:45:33,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4008 [2020-10-12 09:45:33,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:33,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:45:33,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:33,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:45:33,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:33,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:33,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:33,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:33,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:33,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:33,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:45:33,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:33,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:33,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:33,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:33,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:45:33,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418841324] [2020-10-12 09:45:33,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:33,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:45:33,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111110342] [2020-10-12 09:45:33,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:45:33,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:33,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:45:33,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:45:33,916 INFO L87 Difference]: Start difference. First operand 156 states and 185 transitions. Second operand 15 states. [2020-10-12 09:45:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:34,138 INFO L93 Difference]: Finished difference Result 286 states and 344 transitions. [2020-10-12 09:45:34,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:45:34,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-12 09:45:34,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:34,141 INFO L225 Difference]: With dead ends: 286 [2020-10-12 09:45:34,141 INFO L226 Difference]: Without dead ends: 159 [2020-10-12 09:45:34,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:45:34,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-12 09:45:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-12 09:45:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-12 09:45:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 187 transitions. [2020-10-12 09:45:34,187 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 187 transitions. Word has length 60 [2020-10-12 09:45:34,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:34,187 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 187 transitions. [2020-10-12 09:45:34,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:45:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 187 transitions. [2020-10-12 09:45:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 09:45:34,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:34,188 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:34,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 09:45:34,188 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:34,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash 449952290, now seen corresponding path program 9 times [2020-10-12 09:45:34,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:34,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988183126] [2020-10-12 09:45:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:34,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:34,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:34,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:34,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:34,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:34,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:34,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:34,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:38,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:38,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 09:45:38,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:45:38,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4134 [2020-10-12 09:45:38,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:38,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:45:38,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:38,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:45:38,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:38,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:38,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:38,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:38,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:38,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:38,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:38,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:38,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:38,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:38,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:38,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:45:38,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988183126] [2020-10-12 09:45:38,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:38,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:45:38,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718517734] [2020-10-12 09:45:38,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:45:38,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:38,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:45:38,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:45:38,496 INFO L87 Difference]: Start difference. First operand 158 states and 187 transitions. Second operand 16 states. [2020-10-12 09:45:38,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:38,642 INFO L93 Difference]: Finished difference Result 288 states and 346 transitions. [2020-10-12 09:45:38,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:45:38,643 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-10-12 09:45:38,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:38,644 INFO L225 Difference]: With dead ends: 288 [2020-10-12 09:45:38,644 INFO L226 Difference]: Without dead ends: 161 [2020-10-12 09:45:38,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:45:38,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-12 09:45:38,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-12 09:45:38,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-12 09:45:38,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 189 transitions. [2020-10-12 09:45:38,675 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 189 transitions. Word has length 62 [2020-10-12 09:45:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:38,675 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 189 transitions. [2020-10-12 09:45:38,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:45:38,676 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 189 transitions. [2020-10-12 09:45:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 09:45:38,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:38,676 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:38,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 09:45:38,676 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:38,677 INFO L82 PathProgramCache]: Analyzing trace with hash 789979012, now seen corresponding path program 10 times [2020-10-12 09:45:38,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:38,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975015115] [2020-10-12 09:45:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:38,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:38,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:38,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:38,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:38,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:38,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:38,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:38,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:43,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:43,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 09:45:43,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:45:43,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4750 [2020-10-12 09:45:43,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:43,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:45:43,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:43,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:45:43,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:43,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:43,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:43,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:43,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:43,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:43,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:43,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:43,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:43,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:43,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:43,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:45:43,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975015115] [2020-10-12 09:45:43,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:43,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:45:43,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575738515] [2020-10-12 09:45:43,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:45:43,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:43,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:45:43,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:45:43,612 INFO L87 Difference]: Start difference. First operand 160 states and 189 transitions. Second operand 17 states. [2020-10-12 09:45:43,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:43,881 INFO L93 Difference]: Finished difference Result 290 states and 348 transitions. [2020-10-12 09:45:43,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:45:43,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2020-10-12 09:45:43,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:43,884 INFO L225 Difference]: With dead ends: 290 [2020-10-12 09:45:43,884 INFO L226 Difference]: Without dead ends: 163 [2020-10-12 09:45:43,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:45:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-12 09:45:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-10-12 09:45:43,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-12 09:45:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 191 transitions. [2020-10-12 09:45:43,941 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 191 transitions. Word has length 64 [2020-10-12 09:45:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:43,943 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 191 transitions. [2020-10-12 09:45:43,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:45:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 191 transitions. [2020-10-12 09:45:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 09:45:43,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:43,945 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:43,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 09:45:43,946 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:43,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1138144358, now seen corresponding path program 11 times [2020-10-12 09:45:43,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:43,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358850434] [2020-10-12 09:45:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:43,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:44,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:44,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:44,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:44,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:44,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:44,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:44,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:48,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:48,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 09:45:48,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:45:48,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:45:48,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:48,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:45:48,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:48,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:45:48,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:49,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:49,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:49,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:49,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:49,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:49,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:49,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:49,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:49,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:49,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:49,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:45:49,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358850434] [2020-10-12 09:45:49,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:49,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:45:49,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155930171] [2020-10-12 09:45:49,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:45:49,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:49,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:45:49,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:45:49,166 INFO L87 Difference]: Start difference. First operand 162 states and 191 transitions. Second operand 18 states. [2020-10-12 09:45:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:49,306 INFO L93 Difference]: Finished difference Result 292 states and 350 transitions. [2020-10-12 09:45:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:45:49,306 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2020-10-12 09:45:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:49,308 INFO L225 Difference]: With dead ends: 292 [2020-10-12 09:45:49,308 INFO L226 Difference]: Without dead ends: 165 [2020-10-12 09:45:49,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:45:49,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-12 09:45:49,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-10-12 09:45:49,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-12 09:45:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2020-10-12 09:45:49,346 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 66 [2020-10-12 09:45:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:49,347 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2020-10-12 09:45:49,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:45:49,347 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2020-10-12 09:45:49,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 09:45:49,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:49,348 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:49,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 09:45:49,348 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:49,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:49,349 INFO L82 PathProgramCache]: Analyzing trace with hash 717592776, now seen corresponding path program 12 times [2020-10-12 09:45:49,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:49,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588560011] [2020-10-12 09:45:49,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:49,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:49,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:49,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:49,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:49,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:49,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:49,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:50,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:54,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:54,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 09:45:54,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:45:54,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:45:54,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:54,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:45:54,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:54,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:45:54,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:54,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:45:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:54,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:54,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:54,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:45:54,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:45:54,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:45:54,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:54,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:45:54,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:45:54,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:45:54,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:45:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:45:54,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588560011] [2020-10-12 09:45:54,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:45:54,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:45:54,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444484317] [2020-10-12 09:45:54,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:45:54,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:45:54,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:45:54,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:45:54,595 INFO L87 Difference]: Start difference. First operand 164 states and 193 transitions. Second operand 19 states. [2020-10-12 09:45:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:45:54,861 INFO L93 Difference]: Finished difference Result 294 states and 352 transitions. [2020-10-12 09:45:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:45:54,862 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 68 [2020-10-12 09:45:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:45:54,864 INFO L225 Difference]: With dead ends: 294 [2020-10-12 09:45:54,864 INFO L226 Difference]: Without dead ends: 167 [2020-10-12 09:45:54,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:45:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-12 09:45:54,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-12 09:45:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-12 09:45:54,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 195 transitions. [2020-10-12 09:45:54,897 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 195 transitions. Word has length 68 [2020-10-12 09:45:54,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:45:54,897 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 195 transitions. [2020-10-12 09:45:54,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:45:54,897 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 195 transitions. [2020-10-12 09:45:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 09:45:54,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:45:54,898 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:45:54,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 09:45:54,899 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:45:54,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:45:54,899 INFO L82 PathProgramCache]: Analyzing trace with hash 294448298, now seen corresponding path program 13 times [2020-10-12 09:45:54,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:45:54,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457420844] [2020-10-12 09:45:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:45:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:45:54,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:54,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:54,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:54,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:55,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:55,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:55,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:55,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:45:59,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:45:59,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 09:45:59,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:45:59,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:45:59,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:45:59,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:45:59,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:45:59,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:45:59,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:00,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:00,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:00,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:00,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:00,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:00,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:00,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:00,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:00,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:00,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:00,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:46:00,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457420844] [2020-10-12 09:46:00,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:00,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:46:00,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287242312] [2020-10-12 09:46:00,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:46:00,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:00,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:46:00,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:46:00,157 INFO L87 Difference]: Start difference. First operand 166 states and 195 transitions. Second operand 20 states. [2020-10-12 09:46:00,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:00,451 INFO L93 Difference]: Finished difference Result 296 states and 354 transitions. [2020-10-12 09:46:00,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:46:00,451 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 70 [2020-10-12 09:46:00,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:00,453 INFO L225 Difference]: With dead ends: 296 [2020-10-12 09:46:00,453 INFO L226 Difference]: Without dead ends: 169 [2020-10-12 09:46:00,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:46:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-12 09:46:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2020-10-12 09:46:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-12 09:46:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2020-10-12 09:46:00,488 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 70 [2020-10-12 09:46:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:00,488 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2020-10-12 09:46:00,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:46:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2020-10-12 09:46:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 09:46:00,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:00,490 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:00,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 09:46:00,490 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:00,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:00,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1674498060, now seen corresponding path program 14 times [2020-10-12 09:46:00,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:00,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960344511] [2020-10-12 09:46:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:00,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:00,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:00,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:00,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:00,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:00,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:00,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:00,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:05,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:05,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 09:46:05,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:46:05,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 09:46:05,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:05,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:46:05,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:46:05,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:46:05,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:05,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:05,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:05,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:05,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:05,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:05,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:05,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:05,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:05,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:05,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:05,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:46:05,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960344511] [2020-10-12 09:46:05,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:05,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:46:05,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756222959] [2020-10-12 09:46:05,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:46:05,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:05,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:46:05,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:46:05,777 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand 21 states. [2020-10-12 09:46:05,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:05,912 INFO L93 Difference]: Finished difference Result 298 states and 356 transitions. [2020-10-12 09:46:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:46:05,913 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 72 [2020-10-12 09:46:05,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:05,914 INFO L225 Difference]: With dead ends: 298 [2020-10-12 09:46:05,914 INFO L226 Difference]: Without dead ends: 171 [2020-10-12 09:46:05,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:46:05,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-12 09:46:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2020-10-12 09:46:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-12 09:46:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 199 transitions. [2020-10-12 09:46:05,940 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 199 transitions. Word has length 72 [2020-10-12 09:46:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:05,940 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 199 transitions. [2020-10-12 09:46:05,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:46:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 199 transitions. [2020-10-12 09:46:05,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 09:46:05,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:05,941 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:05,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 09:46:05,942 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:05,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:05,942 INFO L82 PathProgramCache]: Analyzing trace with hash 757424878, now seen corresponding path program 15 times [2020-10-12 09:46:05,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:05,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024970216] [2020-10-12 09:46:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:05,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:05,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:05,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:05,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:06,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:06,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:06,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:06,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:10,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:10,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 09:46:10,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:46:10,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:46:10,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:10,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:46:10,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:46:10,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:46:10,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:11,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:11,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:11,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:11,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:11,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:11,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:11,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:11,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:11,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:11,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:11,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:46:11,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024970216] [2020-10-12 09:46:11,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:11,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:46:11,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75152287] [2020-10-12 09:46:11,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:46:11,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:11,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:46:11,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:46:11,254 INFO L87 Difference]: Start difference. First operand 170 states and 199 transitions. Second operand 22 states. [2020-10-12 09:46:11,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:11,532 INFO L93 Difference]: Finished difference Result 300 states and 358 transitions. [2020-10-12 09:46:11,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:46:11,533 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 74 [2020-10-12 09:46:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:11,534 INFO L225 Difference]: With dead ends: 300 [2020-10-12 09:46:11,535 INFO L226 Difference]: Without dead ends: 173 [2020-10-12 09:46:11,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:46:11,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-12 09:46:11,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2020-10-12 09:46:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-12 09:46:11,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 201 transitions. [2020-10-12 09:46:11,560 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 201 transitions. Word has length 74 [2020-10-12 09:46:11,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:11,561 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 201 transitions. [2020-10-12 09:46:11,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:46:11,561 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 201 transitions. [2020-10-12 09:46:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 09:46:11,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:11,562 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:11,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 09:46:11,562 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:11,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:11,562 INFO L82 PathProgramCache]: Analyzing trace with hash -81607344, now seen corresponding path program 16 times [2020-10-12 09:46:11,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:11,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595270266] [2020-10-12 09:46:11,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:11,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:11,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:11,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:11,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:11,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:11,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:12,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:12,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:16,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:16,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 09:46:16,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:46:16,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:46:16,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:46:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:46:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:46:16,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:16,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:16,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:16,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:16,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:16,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:16,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:16,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:16,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:16,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:16,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:16,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:46:16,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595270266] [2020-10-12 09:46:16,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:16,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:46:16,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902566111] [2020-10-12 09:46:16,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:46:16,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:16,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:46:16,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:46:16,903 INFO L87 Difference]: Start difference. First operand 172 states and 201 transitions. Second operand 23 states. [2020-10-12 09:46:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:17,072 INFO L93 Difference]: Finished difference Result 302 states and 360 transitions. [2020-10-12 09:46:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:46:17,073 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 76 [2020-10-12 09:46:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:17,075 INFO L225 Difference]: With dead ends: 302 [2020-10-12 09:46:17,075 INFO L226 Difference]: Without dead ends: 175 [2020-10-12 09:46:17,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:46:17,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-12 09:46:17,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-10-12 09:46:17,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-12 09:46:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 203 transitions. [2020-10-12 09:46:17,108 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 203 transitions. Word has length 76 [2020-10-12 09:46:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:17,109 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 203 transitions. [2020-10-12 09:46:17,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:46:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 203 transitions. [2020-10-12 09:46:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 09:46:17,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:17,110 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:17,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 09:46:17,110 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:17,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:17,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1062278962, now seen corresponding path program 17 times [2020-10-12 09:46:17,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:17,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143584551] [2020-10-12 09:46:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:17,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:17,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:17,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:17,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:17,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:17,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:17,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:17,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:22,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:22,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 09:46:22,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:46:22,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:46:22,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:46:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:46:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:46:22,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:22,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:22,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:22,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:22,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:22,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:22,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:22,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:22,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:22,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:22,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:22,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:46:22,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143584551] [2020-10-12 09:46:22,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:22,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:46:22,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144797204] [2020-10-12 09:46:22,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:46:22,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:22,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:46:22,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:46:22,464 INFO L87 Difference]: Start difference. First operand 174 states and 203 transitions. Second operand 24 states. [2020-10-12 09:46:22,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:22,785 INFO L93 Difference]: Finished difference Result 304 states and 362 transitions. [2020-10-12 09:46:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:46:22,786 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 78 [2020-10-12 09:46:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:22,787 INFO L225 Difference]: With dead ends: 304 [2020-10-12 09:46:22,788 INFO L226 Difference]: Without dead ends: 177 [2020-10-12 09:46:22,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:46:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-12 09:46:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2020-10-12 09:46:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-12 09:46:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 205 transitions. [2020-10-12 09:46:22,814 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 205 transitions. Word has length 78 [2020-10-12 09:46:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:22,815 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 205 transitions. [2020-10-12 09:46:22,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:46:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 205 transitions. [2020-10-12 09:46:22,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 09:46:22,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:22,815 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:22,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 09:46:22,816 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:22,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:22,816 INFO L82 PathProgramCache]: Analyzing trace with hash 825391252, now seen corresponding path program 18 times [2020-10-12 09:46:22,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:22,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819732394] [2020-10-12 09:46:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:22,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:22,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:22,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:22,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:22,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:22,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:22,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:22,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:27,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:27,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 09:46:27,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:46:27,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:46:27,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:27,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:46:27,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:46:27,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:46:27,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:28,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:28,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:28,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:28,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:28,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:28,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:28,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:28,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:28,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:28,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:28,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:46:28,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819732394] [2020-10-12 09:46:28,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:28,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:46:28,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146474413] [2020-10-12 09:46:28,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:46:28,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:28,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:46:28,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:46:28,227 INFO L87 Difference]: Start difference. First operand 176 states and 205 transitions. Second operand 25 states. [2020-10-12 09:46:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:28,399 INFO L93 Difference]: Finished difference Result 306 states and 364 transitions. [2020-10-12 09:46:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:46:28,400 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2020-10-12 09:46:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:28,402 INFO L225 Difference]: With dead ends: 306 [2020-10-12 09:46:28,402 INFO L226 Difference]: Without dead ends: 179 [2020-10-12 09:46:28,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:46:28,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-12 09:46:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2020-10-12 09:46:28,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-12 09:46:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 207 transitions. [2020-10-12 09:46:28,432 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 207 transitions. Word has length 80 [2020-10-12 09:46:28,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:28,433 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 207 transitions. [2020-10-12 09:46:28,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:46:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 207 transitions. [2020-10-12 09:46:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 09:46:28,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:28,434 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:28,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 09:46:28,434 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:28,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:28,434 INFO L82 PathProgramCache]: Analyzing trace with hash 809568630, now seen corresponding path program 19 times [2020-10-12 09:46:28,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:28,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234732610] [2020-10-12 09:46:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:28,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:28,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:28,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:28,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:28,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:28,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:28,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:29,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:33,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:33,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 09:46:33,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:46:33,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 09:46:33,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:46:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:46:33,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:46:33,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:33,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:33,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:33,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:33,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:33,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:33,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:33,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:33,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:33,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:33,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:33,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:46:33,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234732610] [2020-10-12 09:46:33,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:33,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:46:33,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133611734] [2020-10-12 09:46:33,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:46:33,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:33,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:46:33,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:46:33,885 INFO L87 Difference]: Start difference. First operand 178 states and 207 transitions. Second operand 26 states. [2020-10-12 09:46:34,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:34,159 INFO L93 Difference]: Finished difference Result 308 states and 366 transitions. [2020-10-12 09:46:34,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:46:34,160 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2020-10-12 09:46:34,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:34,161 INFO L225 Difference]: With dead ends: 308 [2020-10-12 09:46:34,162 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 09:46:34,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:46:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 09:46:34,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2020-10-12 09:46:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-12 09:46:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 209 transitions. [2020-10-12 09:46:34,189 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 209 transitions. Word has length 82 [2020-10-12 09:46:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:34,190 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 209 transitions. [2020-10-12 09:46:34,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:46:34,190 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 209 transitions. [2020-10-12 09:46:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 09:46:34,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:34,191 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:34,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 09:46:34,191 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1511069224, now seen corresponding path program 20 times [2020-10-12 09:46:34,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:34,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194999977] [2020-10-12 09:46:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:34,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:34,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:34,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:34,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:34,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:34,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:34,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:34,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:39,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:39,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 09:46:39,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:46:39,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:46:39,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:39,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:46:39,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:46:39,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:46:39,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:39,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:39,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:39,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:39,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:39,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:39,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:39,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:39,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:39,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:39,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:39,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:46:39,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194999977] [2020-10-12 09:46:39,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:39,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:46:39,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47744364] [2020-10-12 09:46:39,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:46:39,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:39,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:46:39,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:46:39,655 INFO L87 Difference]: Start difference. First operand 180 states and 209 transitions. Second operand 27 states. [2020-10-12 09:46:40,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:40,041 INFO L93 Difference]: Finished difference Result 310 states and 368 transitions. [2020-10-12 09:46:40,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:46:40,042 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 84 [2020-10-12 09:46:40,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:40,044 INFO L225 Difference]: With dead ends: 310 [2020-10-12 09:46:40,044 INFO L226 Difference]: Without dead ends: 183 [2020-10-12 09:46:40,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:46:40,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-12 09:46:40,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2020-10-12 09:46:40,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-12 09:46:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 211 transitions. [2020-10-12 09:46:40,085 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 211 transitions. Word has length 84 [2020-10-12 09:46:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:40,085 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 211 transitions. [2020-10-12 09:46:40,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:46:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 211 transitions. [2020-10-12 09:46:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 09:46:40,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:40,086 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:40,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 09:46:40,086 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:40,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:40,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1738947002, now seen corresponding path program 21 times [2020-10-12 09:46:40,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:40,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001975854] [2020-10-12 09:46:40,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:40,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:40,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:40,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:40,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:40,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:41,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:41,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:41,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:45,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:45,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 09:46:45,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:46:45,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:46:45,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:45,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:46:45,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:46:45,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:46:45,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:45,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:45,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:45,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:45,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:45,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:45,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:45,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:45,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:45,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:45,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:45,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:46:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:46:45,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001975854] [2020-10-12 09:46:45,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:45,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:46:45,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563699829] [2020-10-12 09:46:45,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:46:45,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:45,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:46:45,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:46:45,713 INFO L87 Difference]: Start difference. First operand 182 states and 211 transitions. Second operand 28 states. [2020-10-12 09:46:46,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:46,209 INFO L93 Difference]: Finished difference Result 312 states and 370 transitions. [2020-10-12 09:46:46,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:46:46,210 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 86 [2020-10-12 09:46:46,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:46,212 INFO L225 Difference]: With dead ends: 312 [2020-10-12 09:46:46,212 INFO L226 Difference]: Without dead ends: 185 [2020-10-12 09:46:46,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:46:46,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-12 09:46:46,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-10-12 09:46:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-12 09:46:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 213 transitions. [2020-10-12 09:46:46,275 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 213 transitions. Word has length 86 [2020-10-12 09:46:46,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:46,276 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 213 transitions. [2020-10-12 09:46:46,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:46:46,276 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 213 transitions. [2020-10-12 09:46:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 09:46:46,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:46,278 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:46,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 09:46:46,278 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:46,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:46,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1731651300, now seen corresponding path program 22 times [2020-10-12 09:46:46,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:46,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882785477] [2020-10-12 09:46:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:46,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:46,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:47,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:47,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:47,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:47,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:47,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:47,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:51,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:51,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 09:46:51,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:46:51,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:46:51,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:51,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:46:51,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:46:51,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:46:51,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:51,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:51,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:51,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:51,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:51,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:51,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:51,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:51,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:51,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:51,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:51,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:46:51,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882785477] [2020-10-12 09:46:51,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:51,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:46:51,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026203986] [2020-10-12 09:46:51,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:46:51,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:51,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:46:51,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:46:51,817 INFO L87 Difference]: Start difference. First operand 184 states and 213 transitions. Second operand 29 states. [2020-10-12 09:46:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:52,219 INFO L93 Difference]: Finished difference Result 314 states and 372 transitions. [2020-10-12 09:46:52,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:46:52,219 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 88 [2020-10-12 09:46:52,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:52,221 INFO L225 Difference]: With dead ends: 314 [2020-10-12 09:46:52,221 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 09:46:52,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:46:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 09:46:52,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-10-12 09:46:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-12 09:46:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 215 transitions. [2020-10-12 09:46:52,258 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 215 transitions. Word has length 88 [2020-10-12 09:46:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:52,259 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 215 transitions. [2020-10-12 09:46:52,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:46:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 215 transitions. [2020-10-12 09:46:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 09:46:52,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:52,260 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:52,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 09:46:52,260 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:52,260 INFO L82 PathProgramCache]: Analyzing trace with hash 212969470, now seen corresponding path program 23 times [2020-10-12 09:46:52,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:52,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318276081] [2020-10-12 09:46:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:52,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:52,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:53,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:53,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:53,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:53,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:53,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:53,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:57,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:57,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 09:46:57,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:46:57,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-12 09:46:57,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:46:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:46:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:46:57,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:57,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:46:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:57,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:57,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:46:57,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:46:57,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:46:57,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:46:57,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:46:57,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:46:57,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:46:57,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:46:57,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:46:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:46:57,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318276081] [2020-10-12 09:46:57,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:46:57,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:46:57,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173230054] [2020-10-12 09:46:57,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:46:57,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:46:57,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:46:57,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:46:57,857 INFO L87 Difference]: Start difference. First operand 186 states and 215 transitions. Second operand 30 states. [2020-10-12 09:46:58,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:46:58,284 INFO L93 Difference]: Finished difference Result 316 states and 374 transitions. [2020-10-12 09:46:58,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:46:58,285 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 90 [2020-10-12 09:46:58,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:46:58,286 INFO L225 Difference]: With dead ends: 316 [2020-10-12 09:46:58,287 INFO L226 Difference]: Without dead ends: 189 [2020-10-12 09:46:58,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:46:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-12 09:46:58,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-10-12 09:46:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-12 09:46:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 217 transitions. [2020-10-12 09:46:58,313 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 217 transitions. Word has length 90 [2020-10-12 09:46:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:46:58,313 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 217 transitions. [2020-10-12 09:46:58,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:46:58,313 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 217 transitions. [2020-10-12 09:46:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 09:46:58,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:46:58,314 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:46:58,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 09:46:58,314 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:46:58,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:46:58,314 INFO L82 PathProgramCache]: Analyzing trace with hash 682755680, now seen corresponding path program 24 times [2020-10-12 09:46:58,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:46:58,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411223640] [2020-10-12 09:46:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:46:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:46:58,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:58,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:59,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:59,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:59,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:59,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:59,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:46:59,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:03,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 09:47:03,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:47:03,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 09:47:03,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:03,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:47:03,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:03,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:47:03,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:03,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:03,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:03,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:03,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:03,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:03,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:03,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:03,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:03,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:03,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:03,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:47:03,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411223640] [2020-10-12 09:47:03,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:03,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:47:03,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444323324] [2020-10-12 09:47:03,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:47:03,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:03,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:47:03,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:47:03,932 INFO L87 Difference]: Start difference. First operand 188 states and 217 transitions. Second operand 31 states. [2020-10-12 09:47:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:04,194 INFO L93 Difference]: Finished difference Result 318 states and 376 transitions. [2020-10-12 09:47:04,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:47:04,196 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 92 [2020-10-12 09:47:04,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:04,197 INFO L225 Difference]: With dead ends: 318 [2020-10-12 09:47:04,197 INFO L226 Difference]: Without dead ends: 191 [2020-10-12 09:47:04,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:47:04,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-12 09:47:04,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2020-10-12 09:47:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-12 09:47:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 219 transitions. [2020-10-12 09:47:04,228 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 219 transitions. Word has length 92 [2020-10-12 09:47:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:04,228 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 219 transitions. [2020-10-12 09:47:04,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:47:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 219 transitions. [2020-10-12 09:47:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 09:47:04,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:04,229 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:04,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 09:47:04,232 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:04,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:04,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1175737410, now seen corresponding path program 25 times [2020-10-12 09:47:04,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:04,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775996538] [2020-10-12 09:47:04,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:04,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:04,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:05,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:06,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:06,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:06,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:09,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:09,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 09:47:09,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:47:09,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:47:09,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:09,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:47:09,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:09,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:47:09,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:09,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:09,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:09,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:09,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:09,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:09,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:09,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:09,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:09,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:09,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:09,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:47:09,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775996538] [2020-10-12 09:47:09,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:09,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:47:09,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937138923] [2020-10-12 09:47:09,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:47:09,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:09,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:47:09,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:47:09,906 INFO L87 Difference]: Start difference. First operand 190 states and 219 transitions. Second operand 32 states. [2020-10-12 09:47:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:10,363 INFO L93 Difference]: Finished difference Result 320 states and 378 transitions. [2020-10-12 09:47:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:47:10,363 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 94 [2020-10-12 09:47:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:10,365 INFO L225 Difference]: With dead ends: 320 [2020-10-12 09:47:10,365 INFO L226 Difference]: Without dead ends: 193 [2020-10-12 09:47:10,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:47:10,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-12 09:47:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2020-10-12 09:47:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-12 09:47:10,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 221 transitions. [2020-10-12 09:47:10,390 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 221 transitions. Word has length 94 [2020-10-12 09:47:10,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:10,391 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 221 transitions. [2020-10-12 09:47:10,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:47:10,391 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 221 transitions. [2020-10-12 09:47:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 09:47:10,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:10,392 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:10,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 09:47:10,392 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:10,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:10,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1810189916, now seen corresponding path program 26 times [2020-10-12 09:47:10,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:10,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855227206] [2020-10-12 09:47:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:10,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:10,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:10,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:10,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:11,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:12,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:13,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:13,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:15,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:15,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 09:47:15,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:47:15,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 09:47:15,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:15,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:47:15,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:15,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:47:15,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:16,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:16,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:16,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:16,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:16,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:16,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:16,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:16,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:47:16,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855227206] [2020-10-12 09:47:16,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:16,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:47:16,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347972910] [2020-10-12 09:47:16,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:47:16,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:16,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:47:16,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:47:16,070 INFO L87 Difference]: Start difference. First operand 192 states and 221 transitions. Second operand 33 states. [2020-10-12 09:47:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:16,530 INFO L93 Difference]: Finished difference Result 322 states and 380 transitions. [2020-10-12 09:47:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:47:16,531 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 96 [2020-10-12 09:47:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:16,533 INFO L225 Difference]: With dead ends: 322 [2020-10-12 09:47:16,533 INFO L226 Difference]: Without dead ends: 195 [2020-10-12 09:47:16,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:47:16,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-12 09:47:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2020-10-12 09:47:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-12 09:47:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 223 transitions. [2020-10-12 09:47:16,561 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 223 transitions. Word has length 96 [2020-10-12 09:47:16,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:16,562 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 223 transitions. [2020-10-12 09:47:16,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:47:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 223 transitions. [2020-10-12 09:47:16,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 09:47:16,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:16,563 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:16,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 09:47:16,563 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:16,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:16,563 INFO L82 PathProgramCache]: Analyzing trace with hash 2046770822, now seen corresponding path program 27 times [2020-10-12 09:47:16,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:16,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419151925] [2020-10-12 09:47:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:16,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:16,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:16,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:17,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:17,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:18,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:18,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:19,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:21,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:21,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 09:47:21,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:47:21,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 09:47:21,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:47:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:47:21,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:22,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:22,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:22,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:22,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:22,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:22,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:22,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:22,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:22,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:22,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:22,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:47:22,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419151925] [2020-10-12 09:47:22,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:22,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:47:22,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530857923] [2020-10-12 09:47:22,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:47:22,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:22,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:47:22,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:47:22,289 INFO L87 Difference]: Start difference. First operand 194 states and 223 transitions. Second operand 34 states. [2020-10-12 09:47:22,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:22,756 INFO L93 Difference]: Finished difference Result 324 states and 382 transitions. [2020-10-12 09:47:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:47:22,756 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2020-10-12 09:47:22,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:22,758 INFO L225 Difference]: With dead ends: 324 [2020-10-12 09:47:22,758 INFO L226 Difference]: Without dead ends: 197 [2020-10-12 09:47:22,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:47:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-12 09:47:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2020-10-12 09:47:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-12 09:47:22,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 225 transitions. [2020-10-12 09:47:22,798 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 225 transitions. Word has length 98 [2020-10-12 09:47:22,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:22,798 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 225 transitions. [2020-10-12 09:47:22,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:47:22,799 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 225 transitions. [2020-10-12 09:47:22,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-12 09:47:22,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:22,800 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:22,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 09:47:22,800 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:22,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2029263592, now seen corresponding path program 28 times [2020-10-12 09:47:22,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:22,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685711947] [2020-10-12 09:47:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:22,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:22,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:22,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:22,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:24,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:26,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:26,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:27,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:27,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:27,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-12 09:47:27,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:47:27,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:47:27,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:27,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:47:27,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:27,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:47:27,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:28,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:28,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:28,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:28,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:28,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:28,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:28,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:28,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:28,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:28,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:28,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:47:28,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685711947] [2020-10-12 09:47:28,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:28,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:47:28,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207484426] [2020-10-12 09:47:28,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:47:28,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:28,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:47:28,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:47:28,561 INFO L87 Difference]: Start difference. First operand 196 states and 225 transitions. Second operand 35 states. [2020-10-12 09:47:28,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:28,769 INFO L93 Difference]: Finished difference Result 326 states and 384 transitions. [2020-10-12 09:47:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:47:28,769 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2020-10-12 09:47:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:28,771 INFO L225 Difference]: With dead ends: 326 [2020-10-12 09:47:28,771 INFO L226 Difference]: Without dead ends: 199 [2020-10-12 09:47:28,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:47:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-12 09:47:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2020-10-12 09:47:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-12 09:47:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 227 transitions. [2020-10-12 09:47:28,797 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 227 transitions. Word has length 100 [2020-10-12 09:47:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:28,797 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 227 transitions. [2020-10-12 09:47:28,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:47:28,797 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 227 transitions. [2020-10-12 09:47:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-12 09:47:28,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:28,798 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:28,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 09:47:28,799 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:28,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:28,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1910282550, now seen corresponding path program 29 times [2020-10-12 09:47:28,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:28,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523632208] [2020-10-12 09:47:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:28,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:28,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:28,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:28,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:32,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:32,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:32,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:32,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:33,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:33,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 09:47:33,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:47:33,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-12 09:47:33,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:33,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:47:33,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:47:33,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:34,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:34,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:34,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:34,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:34,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:34,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:34,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:34,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:34,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:34,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:34,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:47:34,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523632208] [2020-10-12 09:47:34,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:34,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:47:34,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4522761] [2020-10-12 09:47:34,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:47:34,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:34,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:47:34,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:47:34,637 INFO L87 Difference]: Start difference. First operand 198 states and 227 transitions. Second operand 36 states. [2020-10-12 09:47:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:34,977 INFO L93 Difference]: Finished difference Result 328 states and 386 transitions. [2020-10-12 09:47:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:47:34,978 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 102 [2020-10-12 09:47:34,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:34,980 INFO L225 Difference]: With dead ends: 328 [2020-10-12 09:47:34,980 INFO L226 Difference]: Without dead ends: 201 [2020-10-12 09:47:34,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:47:34,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-12 09:47:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-10-12 09:47:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-12 09:47:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 229 transitions. [2020-10-12 09:47:35,014 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 229 transitions. Word has length 102 [2020-10-12 09:47:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:35,014 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 229 transitions. [2020-10-12 09:47:35,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:47:35,014 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 229 transitions. [2020-10-12 09:47:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-12 09:47:35,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:35,015 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:35,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 09:47:35,016 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:35,016 INFO L82 PathProgramCache]: Analyzing trace with hash 347030060, now seen corresponding path program 30 times [2020-10-12 09:47:35,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:35,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470407117] [2020-10-12 09:47:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:35,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:35,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:35,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:35,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:36,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:36,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:36,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:37,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:40,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:40,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-12 09:47:40,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:47:40,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:47:40,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:40,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:47:40,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:47:40,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 09:47:40,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:40,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:47:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:40,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:40,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:47:40,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:47:40,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:47:40,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:47:40,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:47:40,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:47:40,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:47:40,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:47:40,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:47:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:47:40,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470407117] [2020-10-12 09:47:40,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:47:40,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:47:40,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094864862] [2020-10-12 09:47:40,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:47:40,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:47:40,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:47:40,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:47:40,869 INFO L87 Difference]: Start difference. First operand 200 states and 229 transitions. Second operand 37 states. [2020-10-12 09:47:41,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:47:41,357 INFO L93 Difference]: Finished difference Result 330 states and 388 transitions. [2020-10-12 09:47:41,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:47:41,358 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 104 [2020-10-12 09:47:41,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:47:41,359 INFO L225 Difference]: With dead ends: 330 [2020-10-12 09:47:41,359 INFO L226 Difference]: Without dead ends: 203 [2020-10-12 09:47:41,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:47:41,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-12 09:47:41,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2020-10-12 09:47:41,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-12 09:47:41,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 231 transitions. [2020-10-12 09:47:41,385 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 231 transitions. Word has length 104 [2020-10-12 09:47:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:47:41,385 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 231 transitions. [2020-10-12 09:47:41,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 09:47:41,385 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 231 transitions. [2020-10-12 09:47:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-12 09:47:41,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:47:41,386 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:47:41,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 09:47:41,387 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:47:41,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:47:41,387 INFO L82 PathProgramCache]: Analyzing trace with hash 665963790, now seen corresponding path program 31 times [2020-10-12 09:47:41,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:47:41,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130755160] [2020-10-12 09:47:41,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:47:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:47:41,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:41,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:41,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:47:41,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking...