/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=NARROWEST --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/systemc/mem_slave_tlm.2.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 15:41:10,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 15:41:10,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 15:41:10,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 15:41:10,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 15:41:10,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 15:41:10,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 15:41:10,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 15:41:10,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 15:41:10,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 15:41:10,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 15:41:10,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 15:41:10,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 15:41:10,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 15:41:10,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 15:41:10,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 15:41:10,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 15:41:10,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 15:41:10,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 15:41:10,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 15:41:10,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 15:41:10,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 15:41:10,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 15:41:10,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 15:41:10,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 15:41:10,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 15:41:10,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 15:41:10,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 15:41:10,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 15:41:10,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 15:41:10,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 15:41:10,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 15:41:10,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 15:41:10,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 15:41:10,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 15:41:10,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 15:41:10,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 15:41:10,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 15:41:10,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 15:41:10,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 15:41:10,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 15:41:10,776 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 [2020-10-13 15:41:10,815 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 15:41:10,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 15:41:10,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 15:41:10,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 15:41:10,818 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 15:41:10,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 15:41:10,818 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 15:41:10,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 15:41:10,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 15:41:10,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 15:41:10,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 15:41:10,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 15:41:10,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 15:41:10,820 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 15:41:10,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 15:41:10,821 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 15:41:10,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 15:41:10,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 15:41:10,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 15:41:10,821 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 15:41:10,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 15:41:10,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:41:10,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 15:41:10,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 15:41:10,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 15:41:10,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 15:41:10,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 15:41:10,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 15:41:10,823 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 15:41:10,823 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 15:41:11,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 15:41:11,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 15:41:11,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 15:41:11,125 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 15:41:11,125 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 15:41:11,126 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/mem_slave_tlm.2.cil.c [2020-10-13 15:41:11,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/def803dbc/42f92e59ba614c98a950d0741eb98af2/FLAG5a4e8a46e [2020-10-13 15:41:11,735 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 15:41:11,736 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/mem_slave_tlm.2.cil.c [2020-10-13 15:41:11,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/def803dbc/42f92e59ba614c98a950d0741eb98af2/FLAG5a4e8a46e [2020-10-13 15:41:11,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/def803dbc/42f92e59ba614c98a950d0741eb98af2 [2020-10-13 15:41:12,004 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 15:41:12,007 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 15:41:12,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 15:41:12,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 15:41:12,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 15:41:12,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:41:11" (1/1) ... [2020-10-13 15:41:12,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f0c700e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:12, skipping insertion in model container [2020-10-13 15:41:12,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:41:11" (1/1) ... [2020-10-13 15:41:12,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 15:41:12,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 15:41:12,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:41:12,401 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 15:41:12,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:41:12,680 INFO L208 MainTranslator]: Completed translation [2020-10-13 15:41:12,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:12 WrapperNode [2020-10-13 15:41:12,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 15:41:12,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 15:41:12,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 15:41:12,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 15:41:12,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:12" (1/1) ... [2020-10-13 15:41:12,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:12" (1/1) ... [2020-10-13 15:41:12,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:12" (1/1) ... [2020-10-13 15:41:12,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:12" (1/1) ... [2020-10-13 15:41:12,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:12" (1/1) ... [2020-10-13 15:41:12,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:12" (1/1) ... [2020-10-13 15:41:12,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:12" (1/1) ... [2020-10-13 15:41:12,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 15:41:12,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 15:41:12,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 15:41:12,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 15:41:12,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:12" (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 [2020-10-13 15:41:12,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 15:41:12,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 15:41:12,857 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-10-13 15:41:12,857 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_read [2020-10-13 15:41:12,857 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_write [2020-10-13 15:41:12,857 INFO L138 BoogieDeclarations]: Found implementation of procedure m_run [2020-10-13 15:41:12,857 INFO L138 BoogieDeclarations]: Found implementation of procedure s_run [2020-10-13 15:41:12,859 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-10-13 15:41:12,859 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-10-13 15:41:12,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 15:41:12,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 15:41:12,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 15:41:12,859 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-10-13 15:41:12,860 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_read [2020-10-13 15:41:12,860 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_write [2020-10-13 15:41:12,861 INFO L130 BoogieDeclarations]: Found specification of procedure m_run [2020-10-13 15:41:12,861 INFO L130 BoogieDeclarations]: Found specification of procedure s_run [2020-10-13 15:41:12,861 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-10-13 15:41:12,861 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-10-13 15:41:12,861 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 15:41:12,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 15:41:12,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 15:41:13,967 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 15:41:13,967 INFO L295 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-13 15:41:13,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:41:13 BoogieIcfgContainer [2020-10-13 15:41:13,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 15:41:13,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 15:41:13,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 15:41:13,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 15:41:13,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 03:41:11" (1/3) ... [2020-10-13 15:41:13,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1cc336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:41:13, skipping insertion in model container [2020-10-13 15:41:13,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:41:12" (2/3) ... [2020-10-13 15:41:13,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1cc336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:41:13, skipping insertion in model container [2020-10-13 15:41:13,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:41:13" (3/3) ... [2020-10-13 15:41:13,984 INFO L109 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.2.cil.c [2020-10-13 15:41:13,995 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 15:41:14,003 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 15:41:14,018 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 15:41:14,046 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 15:41:14,047 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 15:41:14,047 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 15:41:14,047 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 15:41:14,047 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 15:41:14,048 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 15:41:14,048 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 15:41:14,048 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 15:41:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states. [2020-10-13 15:41:14,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 15:41:14,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:14,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:41:14,089 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:14,095 INFO L82 PathProgramCache]: Analyzing trace with hash -709971502, now seen corresponding path program 1 times [2020-10-13 15:41:14,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:14,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250297565] [2020-10-13 15:41:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:14,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:14,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:14,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:14,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:15,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:15,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:15,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:15,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:15,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:15,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:16,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:16,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:17,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:17,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:19,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:19,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 15:41:19,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:41:19,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 15:41:19,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:19,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:19,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 15:41:19,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:19,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 15:41:19,634 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:41:19,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:19,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:19,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:19,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:19,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:19,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:41:19,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:19,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:19,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:19,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:19,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:41:19,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250297565] [2020-10-13 15:41:19,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:19,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 15:41:19,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994850728] [2020-10-13 15:41:19,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 15:41:19,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:19,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 15:41:19,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 15:41:19,704 INFO L87 Difference]: Start difference. First operand 300 states. Second operand 3 states. [2020-10-13 15:41:21,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:21,214 INFO L93 Difference]: Finished difference Result 623 states and 1107 transitions. [2020-10-13 15:41:21,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 15:41:21,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-10-13 15:41:21,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:21,243 INFO L225 Difference]: With dead ends: 623 [2020-10-13 15:41:21,244 INFO L226 Difference]: Without dead ends: 342 [2020-10-13 15:41:21,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 15:41:21,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-13 15:41:21,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 291. [2020-10-13 15:41:21,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-13 15:41:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 488 transitions. [2020-10-13 15:41:21,368 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 488 transitions. Word has length 39 [2020-10-13 15:41:21,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:21,369 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 488 transitions. [2020-10-13 15:41:21,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 15:41:21,370 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 488 transitions. [2020-10-13 15:41:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 15:41:21,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:21,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:41:21,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 15:41:21,380 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:21,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:21,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1968034101, now seen corresponding path program 1 times [2020-10-13 15:41:21,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:21,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249422414] [2020-10-13 15:41:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:21,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:21,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:21,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:21,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:21,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:21,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:22,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:22,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:22,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:22,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:23,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:23,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:24,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:24,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:26,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:26,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 15:41:26,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:41:26,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 15:41:26,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:26,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:41:26,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 15:41:26,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:41:26,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:41:26,658 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:41:26,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:26,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:26,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:26,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:26,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:26,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 15:41:26,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:26,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:26,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:26,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:26,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:41:26,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249422414] [2020-10-13 15:41:26,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:26,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:41:26,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710912551] [2020-10-13 15:41:26,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:41:26,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:26,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:41:26,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:41:26,699 INFO L87 Difference]: Start difference. First operand 291 states and 488 transitions. Second operand 4 states. [2020-10-13 15:41:26,994 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:41:28,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:28,849 INFO L93 Difference]: Finished difference Result 854 states and 1401 transitions. [2020-10-13 15:41:28,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:41:28,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-13 15:41:28,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:28,855 INFO L225 Difference]: With dead ends: 854 [2020-10-13 15:41:28,855 INFO L226 Difference]: Without dead ends: 589 [2020-10-13 15:41:28,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:41:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-10-13 15:41:28,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 522. [2020-10-13 15:41:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-10-13 15:41:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 852 transitions. [2020-10-13 15:41:28,912 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 852 transitions. Word has length 40 [2020-10-13 15:41:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:28,913 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 852 transitions. [2020-10-13 15:41:28,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:41:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 852 transitions. [2020-10-13 15:41:28,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 15:41:28,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:28,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:41:28,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 15:41:28,919 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:28,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:28,920 INFO L82 PathProgramCache]: Analyzing trace with hash 475995216, now seen corresponding path program 1 times [2020-10-13 15:41:28,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:28,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650756728] [2020-10-13 15:41:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:28,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:28,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:29,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:29,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:29,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:29,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:29,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:29,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:29,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:30,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:30,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:30,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:30,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:30,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:33,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:33,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 15:41:33,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:41:33,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 15:41:33,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:33,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:41:33,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 15:41:33,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 15:41:33,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:41:34,123 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:41:34,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:34,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:34,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:34,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:34,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:34,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:41:34,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:34,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:34,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:34,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:34,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:41:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:41:34,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650756728] [2020-10-13 15:41:34,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:34,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:41:34,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241698358] [2020-10-13 15:41:34,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:41:34,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:34,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:41:34,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:41:34,168 INFO L87 Difference]: Start difference. First operand 522 states and 852 transitions. Second operand 4 states. [2020-10-13 15:41:34,311 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:41:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:36,059 INFO L93 Difference]: Finished difference Result 1516 states and 2473 transitions. [2020-10-13 15:41:36,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:41:36,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-13 15:41:36,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:36,072 INFO L225 Difference]: With dead ends: 1516 [2020-10-13 15:41:36,072 INFO L226 Difference]: Without dead ends: 1027 [2020-10-13 15:41:36,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:41:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2020-10-13 15:41:36,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 932. [2020-10-13 15:41:36,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2020-10-13 15:41:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1541 transitions. [2020-10-13 15:41:36,140 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1541 transitions. Word has length 42 [2020-10-13 15:41:36,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:36,140 INFO L479 AbstractCegarLoop]: Abstraction has 932 states and 1541 transitions. [2020-10-13 15:41:36,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:41:36,141 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1541 transitions. [2020-10-13 15:41:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 15:41:36,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:36,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:41:36,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 15:41:36,144 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:36,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1842644991, now seen corresponding path program 1 times [2020-10-13 15:41:36,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:36,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493894103] [2020-10-13 15:41:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:36,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:36,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:36,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:36,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:36,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:36,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:36,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:36,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:36,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:37,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:37,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:37,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:37,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:37,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:39,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:39,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 15:41:39,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:41:39,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3450 [2020-10-13 15:41:39,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:39,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:41:39,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:41:39,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 15:41:39,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:39,756 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:41:39,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:39,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:39,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:39,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:39,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:39,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:41:39,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:39,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:41:39,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493894103] [2020-10-13 15:41:39,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:39,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:41:39,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066966399] [2020-10-13 15:41:39,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:41:39,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:39,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:41:39,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:41:39,782 INFO L87 Difference]: Start difference. First operand 932 states and 1541 transitions. Second operand 4 states. [2020-10-13 15:41:39,934 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:41:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:41,789 INFO L93 Difference]: Finished difference Result 2221 states and 3638 transitions. [2020-10-13 15:41:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:41:41,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-13 15:41:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:41,799 INFO L225 Difference]: With dead ends: 2221 [2020-10-13 15:41:41,800 INFO L226 Difference]: Without dead ends: 1302 [2020-10-13 15:41:41,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:41:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2020-10-13 15:41:41,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1166. [2020-10-13 15:41:41,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1166 states. [2020-10-13 15:41:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1840 transitions. [2020-10-13 15:41:41,925 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1840 transitions. Word has length 42 [2020-10-13 15:41:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:41,925 INFO L479 AbstractCegarLoop]: Abstraction has 1166 states and 1840 transitions. [2020-10-13 15:41:41,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:41:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1840 transitions. [2020-10-13 15:41:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 15:41:41,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:41,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:41:41,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 15:41:41,927 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:41,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1967608374, now seen corresponding path program 1 times [2020-10-13 15:41:41,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:41,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285467100] [2020-10-13 15:41:41,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:41,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:41,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:42,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:42,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:42,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:42,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:42,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:42,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:43,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:43,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 15:41:43,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 15:41:43,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1739 [2020-10-13 15:41:43,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:43,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:41:43,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 15:41:43,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 15:41:43,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:43,828 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:41:43,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:43,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:43,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:43,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:43,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:43,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:41:43,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:43,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:43,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:43,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:43,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:41:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:41:43,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285467100] [2020-10-13 15:41:43,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:43,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:41:43,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372850199] [2020-10-13 15:41:43,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:41:43,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:43,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:41:43,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:41:43,852 INFO L87 Difference]: Start difference. First operand 1166 states and 1840 transitions. Second operand 4 states. [2020-10-13 15:41:43,979 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:41:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:45,677 INFO L93 Difference]: Finished difference Result 3538 states and 5601 transitions. [2020-10-13 15:41:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:41:45,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-13 15:41:45,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:45,693 INFO L225 Difference]: With dead ends: 3538 [2020-10-13 15:41:45,693 INFO L226 Difference]: Without dead ends: 2397 [2020-10-13 15:41:45,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:41:45,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2020-10-13 15:41:45,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 2160. [2020-10-13 15:41:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2160 states. [2020-10-13 15:41:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 3314 transitions. [2020-10-13 15:41:45,849 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 3314 transitions. Word has length 51 [2020-10-13 15:41:45,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:45,850 INFO L479 AbstractCegarLoop]: Abstraction has 2160 states and 3314 transitions. [2020-10-13 15:41:45,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:41:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 3314 transitions. [2020-10-13 15:41:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 15:41:45,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:45,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:41:45,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 15:41:45,854 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:45,854 INFO L82 PathProgramCache]: Analyzing trace with hash 905985622, now seen corresponding path program 1 times [2020-10-13 15:41:45,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:45,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744877334] [2020-10-13 15:41:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:45,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:46,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:46,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:46,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 15:41:46,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:41:46,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 696 [2020-10-13 15:41:46,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:46,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 15:41:46,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:41:46,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 15:41:46,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:46,731 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:41:46,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:46,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:46,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:46,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:46,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:46,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:41:46,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:46,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:46,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:46,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:46,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:41:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:41:46,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744877334] [2020-10-13 15:41:46,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:46,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:41:46,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409427558] [2020-10-13 15:41:46,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:41:46,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:46,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:41:46,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:41:46,757 INFO L87 Difference]: Start difference. First operand 2160 states and 3314 transitions. Second operand 4 states. [2020-10-13 15:41:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:48,462 INFO L93 Difference]: Finished difference Result 5566 states and 8751 transitions. [2020-10-13 15:41:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:41:48,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-13 15:41:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:48,487 INFO L225 Difference]: With dead ends: 5566 [2020-10-13 15:41:48,487 INFO L226 Difference]: Without dead ends: 3433 [2020-10-13 15:41:48,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:41:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3433 states. [2020-10-13 15:41:48,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3433 to 3110. [2020-10-13 15:41:48,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3110 states. [2020-10-13 15:41:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 4883 transitions. [2020-10-13 15:41:48,792 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 4883 transitions. Word has length 51 [2020-10-13 15:41:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:48,794 INFO L479 AbstractCegarLoop]: Abstraction has 3110 states and 4883 transitions. [2020-10-13 15:41:48,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:41:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 4883 transitions. [2020-10-13 15:41:48,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 15:41:48,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:48,798 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:41:48,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:41:48,799 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:48,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1225853430, now seen corresponding path program 1 times [2020-10-13 15:41:48,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:48,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734517142] [2020-10-13 15:41:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:48,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:48,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:48,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:48,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:48,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:49,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:49,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:49,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:50,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:50,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:50,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:51,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:51,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:53,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:53,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 15:41:53,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 15:41:53,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 15:41:53,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:53,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:41:53,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:41:53,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:41:53,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:41:54,017 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:41:54,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:41:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:54,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:54,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:54,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:41:54,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:54,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 15:41:54,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:54,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:54,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:41:54,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:54,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:41:54,180 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-13 15:41:54,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 15:41:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:54,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:54,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:41:54,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:41:54,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:41:54,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:41:54,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:41:54,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:41:54,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 15:41:54,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:41:54,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:41:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 15:41:54,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734517142] [2020-10-13 15:41:54,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:41:54,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:41:54,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377573975] [2020-10-13 15:41:54,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:41:54,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:41:54,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:41:54,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:41:54,218 INFO L87 Difference]: Start difference. First operand 3110 states and 4883 transitions. Second operand 5 states. [2020-10-13 15:41:54,406 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:41:56,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:41:56,135 INFO L93 Difference]: Finished difference Result 6449 states and 10064 transitions. [2020-10-13 15:41:56,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:41:56,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-13 15:41:56,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:41:56,158 INFO L225 Difference]: With dead ends: 6449 [2020-10-13 15:41:56,158 INFO L226 Difference]: Without dead ends: 3357 [2020-10-13 15:41:56,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:41:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2020-10-13 15:41:56,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 3101. [2020-10-13 15:41:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3101 states. [2020-10-13 15:41:56,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 4872 transitions. [2020-10-13 15:41:56,433 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 4872 transitions. Word has length 63 [2020-10-13 15:41:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:41:56,433 INFO L479 AbstractCegarLoop]: Abstraction has 3101 states and 4872 transitions. [2020-10-13 15:41:56,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:41:56,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 4872 transitions. [2020-10-13 15:41:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 15:41:56,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:41:56,436 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:41:56,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 15:41:56,436 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:41:56,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:41:56,437 INFO L82 PathProgramCache]: Analyzing trace with hash -160931980, now seen corresponding path program 1 times [2020-10-13 15:41:56,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:41:56,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401490527] [2020-10-13 15:41:56,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:41:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:41:56,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:56,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:56,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:56,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:56,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:56,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:56,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:56,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:57,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:57,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:41:59,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:01,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:01,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 15:42:01,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:42:01,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 15:42:01,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:01,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:42:01,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 15:42:01,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:42:01,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:01,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:42:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:01,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:01,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:01,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:42:01,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:01,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:42:01,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:01,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:01,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:01,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:01,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:01,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 15:42:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:01,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:01,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:01,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:42:01,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:01,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:42:01,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:01,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:42:01,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:01,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 15:42:01,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:42:01,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401490527] [2020-10-13 15:42:01,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:42:01,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:42:01,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530360926] [2020-10-13 15:42:01,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:42:01,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:42:01,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:42:01,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:42:01,688 INFO L87 Difference]: Start difference. First operand 3101 states and 4872 transitions. Second operand 5 states. [2020-10-13 15:42:02,073 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:42:03,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:42:03,999 INFO L93 Difference]: Finished difference Result 7060 states and 11470 transitions. [2020-10-13 15:42:04,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 15:42:04,000 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-13 15:42:04,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:42:04,026 INFO L225 Difference]: With dead ends: 7060 [2020-10-13 15:42:04,027 INFO L226 Difference]: Without dead ends: 3977 [2020-10-13 15:42:04,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:42:04,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3977 states. [2020-10-13 15:42:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3977 to 3693. [2020-10-13 15:42:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3693 states. [2020-10-13 15:42:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3693 states to 3693 states and 5954 transitions. [2020-10-13 15:42:04,344 INFO L78 Accepts]: Start accepts. Automaton has 3693 states and 5954 transitions. Word has length 63 [2020-10-13 15:42:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:42:04,344 INFO L479 AbstractCegarLoop]: Abstraction has 3693 states and 5954 transitions. [2020-10-13 15:42:04,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:42:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3693 states and 5954 transitions. [2020-10-13 15:42:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 15:42:04,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:42:04,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:42:04,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 15:42:04,347 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:42:04,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:42:04,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1450279313, now seen corresponding path program 1 times [2020-10-13 15:42:04,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:42:04,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452770094] [2020-10-13 15:42:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:42:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:04,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:04,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:04,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:04,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 15:42:04,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:42:04,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-13 15:42:04,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:04,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:42:04,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 15:42:04,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 15:42:04,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:04,906 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:42:04,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:42:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:04,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:04,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:04,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:42:04,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:04,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:42:04,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:04,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:04,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:04,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:42:04,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452770094] [2020-10-13 15:42:04,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:42:04,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:42:04,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000334807] [2020-10-13 15:42:04,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:42:04,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:42:04,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:42:04,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:42:04,927 INFO L87 Difference]: Start difference. First operand 3693 states and 5954 transitions. Second operand 4 states. [2020-10-13 15:42:05,152 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:42:06,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:42:06,871 INFO L93 Difference]: Finished difference Result 6808 states and 11363 transitions. [2020-10-13 15:42:06,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:42:06,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-13 15:42:06,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:42:06,918 INFO L225 Difference]: With dead ends: 6808 [2020-10-13 15:42:06,918 INFO L226 Difference]: Without dead ends: 6804 [2020-10-13 15:42:06,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:42:06,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6804 states. [2020-10-13 15:42:07,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6804 to 6227. [2020-10-13 15:42:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6227 states. [2020-10-13 15:42:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6227 states to 6227 states and 10605 transitions. [2020-10-13 15:42:07,504 INFO L78 Accepts]: Start accepts. Automaton has 6227 states and 10605 transitions. Word has length 63 [2020-10-13 15:42:07,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:42:07,505 INFO L479 AbstractCegarLoop]: Abstraction has 6227 states and 10605 transitions. [2020-10-13 15:42:07,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:42:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 6227 states and 10605 transitions. [2020-10-13 15:42:07,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 15:42:07,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:42:07,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:42:07,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 15:42:07,520 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:42:07,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:42:07,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1887851463, now seen corresponding path program 1 times [2020-10-13 15:42:07,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:42:07,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315535759] [2020-10-13 15:42:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:42:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:07,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:07,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:07,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:08,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:08,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 15:42:08,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 15:42:08,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1042 [2020-10-13 15:42:08,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:08,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:42:08,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 15:42:08,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 15:42:08,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:08,723 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:42:08,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:42:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:08,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:08,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:08,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:42:08,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:08,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:42:08,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:08,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:08,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:08,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:08,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:08,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 15:42:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:08,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:08,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:08,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 15:42:08,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:08,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:42:08,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:08,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:42:08,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:08,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 15:42:08,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:42:08,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315535759] [2020-10-13 15:42:08,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:42:08,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 15:42:08,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104550745] [2020-10-13 15:42:08,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 15:42:08,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:42:08,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 15:42:08,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:42:08,872 INFO L87 Difference]: Start difference. First operand 6227 states and 10605 transitions. Second operand 7 states. [2020-10-13 15:42:09,138 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-13 15:42:09,706 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:42:11,870 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-13 15:42:13,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:42:13,357 INFO L93 Difference]: Finished difference Result 17621 states and 33574 transitions. [2020-10-13 15:42:13,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 15:42:13,357 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-10-13 15:42:13,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:42:13,442 INFO L225 Difference]: With dead ends: 17621 [2020-10-13 15:42:13,443 INFO L226 Difference]: Without dead ends: 13364 [2020-10-13 15:42:13,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-13 15:42:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13364 states. [2020-10-13 15:42:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13364 to 11970. [2020-10-13 15:42:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11970 states. [2020-10-13 15:42:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11970 states to 11970 states and 22446 transitions. [2020-10-13 15:42:15,026 INFO L78 Accepts]: Start accepts. Automaton has 11970 states and 22446 transitions. Word has length 76 [2020-10-13 15:42:15,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:42:15,026 INFO L479 AbstractCegarLoop]: Abstraction has 11970 states and 22446 transitions. [2020-10-13 15:42:15,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 15:42:15,027 INFO L276 IsEmpty]: Start isEmpty. Operand 11970 states and 22446 transitions. [2020-10-13 15:42:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 15:42:15,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:42:15,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:42:15,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 15:42:15,032 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:42:15,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:42:15,033 INFO L82 PathProgramCache]: Analyzing trace with hash 9543060, now seen corresponding path program 1 times [2020-10-13 15:42:15,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:42:15,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581251677] [2020-10-13 15:42:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:42:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:15,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:15,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:16,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:16,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 15:42:16,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:42:16,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1650 [2020-10-13 15:42:16,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:16,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 15:42:16,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 15:42:16,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 15:42:16,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:16,863 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:42:16,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:42:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:16,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:16,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:16,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:42:16,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:16,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:42:16,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:16,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:16,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:16,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:16,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:16,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 15:42:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:16,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:16,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:16,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 15:42:16,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:16,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 15:42:16,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:16,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:42:16,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:16,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 15:42:16,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:42:17,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581251677] [2020-10-13 15:42:17,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:42:17,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-13 15:42:17,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869810088] [2020-10-13 15:42:17,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 15:42:17,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:42:17,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 15:42:17,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 15:42:17,029 INFO L87 Difference]: Start difference. First operand 11970 states and 22446 transitions. Second operand 10 states. [2020-10-13 15:42:17,188 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:42:17,455 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-13 15:42:17,640 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-13 15:42:18,815 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-13 15:42:18,992 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-13 15:42:20,814 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-13 15:42:21,097 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-13 15:42:22,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:42:22,056 INFO L93 Difference]: Finished difference Result 26671 states and 51852 transitions. [2020-10-13 15:42:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 15:42:22,056 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-10-13 15:42:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:42:22,133 INFO L225 Difference]: With dead ends: 26671 [2020-10-13 15:42:22,134 INFO L226 Difference]: Without dead ends: 14719 [2020-10-13 15:42:22,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-13 15:42:22,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14719 states. [2020-10-13 15:42:23,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14719 to 12246. [2020-10-13 15:42:23,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12246 states. [2020-10-13 15:42:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12246 states to 12246 states and 21640 transitions. [2020-10-13 15:42:23,613 INFO L78 Accepts]: Start accepts. Automaton has 12246 states and 21640 transitions. Word has length 77 [2020-10-13 15:42:23,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:42:23,613 INFO L479 AbstractCegarLoop]: Abstraction has 12246 states and 21640 transitions. [2020-10-13 15:42:23,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 15:42:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 12246 states and 21640 transitions. [2020-10-13 15:42:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 15:42:23,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:42:23,619 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:42:23,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 15:42:23,619 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:42:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:42:23,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1212200770, now seen corresponding path program 1 times [2020-10-13 15:42:23,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:42:23,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157966905] [2020-10-13 15:42:23,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:42:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:23,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:23,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:23,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:23,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:23,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:24,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:24,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:25,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:25,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:26,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:26,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:26,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:26,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:26,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:26,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:26,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:27,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:28,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:28,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:28,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:28,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 15:42:28,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 15:42:28,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 15:42:28,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:28,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:42:28,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 15:42:28,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 15:42:28,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:28,795 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:42:28,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:42:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:28,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:28,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:28,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:42:28,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:28,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:42:28,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:28,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:28,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:28,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:28,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:28,915 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 15:42:28,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 15:42:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:28,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:28,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:28,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 15:42:28,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:28,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:42:28,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:28,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:28,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:42:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:29,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:29,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:29,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:42:29,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:29,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:42:29,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:29,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:29,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:29,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:29,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 15:42:29,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157966905] [2020-10-13 15:42:29,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:42:29,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 15:42:29,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123994321] [2020-10-13 15:42:29,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:42:29,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:42:29,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:42:29,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:42:29,020 INFO L87 Difference]: Start difference. First operand 12246 states and 21640 transitions. Second operand 6 states. [2020-10-13 15:42:29,575 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:42:32,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:42:32,561 INFO L93 Difference]: Finished difference Result 28603 states and 55431 transitions. [2020-10-13 15:42:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 15:42:32,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2020-10-13 15:42:32,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:42:32,654 INFO L225 Difference]: With dead ends: 28603 [2020-10-13 15:42:32,655 INFO L226 Difference]: Without dead ends: 16430 [2020-10-13 15:42:32,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:42:32,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16430 states. [2020-10-13 15:42:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16430 to 15595. [2020-10-13 15:42:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15595 states. [2020-10-13 15:42:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15595 states to 15595 states and 27836 transitions. [2020-10-13 15:42:34,882 INFO L78 Accepts]: Start accepts. Automaton has 15595 states and 27836 transitions. Word has length 90 [2020-10-13 15:42:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:42:34,882 INFO L479 AbstractCegarLoop]: Abstraction has 15595 states and 27836 transitions. [2020-10-13 15:42:34,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:42:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 15595 states and 27836 transitions. [2020-10-13 15:42:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 15:42:34,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:42:34,893 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:42:34,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 15:42:34,893 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:42:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:42:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1353603390, now seen corresponding path program 1 times [2020-10-13 15:42:34,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:42:34,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258761894] [2020-10-13 15:42:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:42:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:34,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:34,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:35,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:35,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:35,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:35,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:36,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:36,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:36,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:39,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:39,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:39,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:39,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:39,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 15:42:39,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:42:39,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-13 15:42:39,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:39,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:42:39,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 15:42:39,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 15:42:39,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:40,121 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:42:40,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:42:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:40,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:40,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:40,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:42:40,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:40,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:42:40,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:40,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:40,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 15:42:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:40,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:40,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:40,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 15:42:40,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:40,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:42:40,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:40,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:40,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:40,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:40,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:40,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:42:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:40,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:40,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:40,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:42:40,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:40,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:42:40,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:40,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:40,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:40,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 15:42:40,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258761894] [2020-10-13 15:42:40,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:42:40,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 15:42:40,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579031338] [2020-10-13 15:42:40,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:42:40,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:42:40,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:42:40,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:42:40,339 INFO L87 Difference]: Start difference. First operand 15595 states and 27836 transitions. Second operand 6 states. [2020-10-13 15:42:40,719 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:42:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:42:42,884 INFO L93 Difference]: Finished difference Result 31831 states and 61586 transitions. [2020-10-13 15:42:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 15:42:42,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-10-13 15:42:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:42:42,976 INFO L225 Difference]: With dead ends: 31831 [2020-10-13 15:42:42,976 INFO L226 Difference]: Without dead ends: 16309 [2020-10-13 15:42:43,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:42:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16309 states. [2020-10-13 15:42:44,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16309 to 15491. [2020-10-13 15:42:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15491 states. [2020-10-13 15:42:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15491 states to 15491 states and 27289 transitions. [2020-10-13 15:42:44,889 INFO L78 Accepts]: Start accepts. Automaton has 15491 states and 27289 transitions. Word has length 94 [2020-10-13 15:42:44,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:42:44,890 INFO L479 AbstractCegarLoop]: Abstraction has 15491 states and 27289 transitions. [2020-10-13 15:42:44,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:42:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 15491 states and 27289 transitions. [2020-10-13 15:42:44,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 15:42:44,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:42:44,901 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:42:44,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 15:42:44,901 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:42:44,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:42:44,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1851806039, now seen corresponding path program 1 times [2020-10-13 15:42:44,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:42:44,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374349824] [2020-10-13 15:42:44,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:42:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:44,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:44,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:45,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:45,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:45,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:45,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:45,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:45,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:46,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:46,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:47,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:47,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:47,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:48,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:48,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:48,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:48,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:49,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:49,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 15:42:49,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 15:42:49,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 15:42:49,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:49,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 15:42:49,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 15:42:49,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 15:42:49,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:50,052 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:42:50,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:42:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:50,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:50,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:50,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:42:50,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:50,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:42:50,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:50,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:50,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:50,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:50,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:50,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 15:42:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:50,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:50,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:50,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 15:42:50,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:50,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:42:50,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:50,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:50,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:42:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:50,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:50,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:50,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:42:50,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:42:50,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:42:50,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:50,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:42:50,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:42:50,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:42:50,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:42:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 15:42:50,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374349824] [2020-10-13 15:42:50,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:42:50,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 15:42:50,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404018918] [2020-10-13 15:42:50,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:42:50,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:42:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:42:50,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:42:50,270 INFO L87 Difference]: Start difference. First operand 15491 states and 27289 transitions. Second operand 6 states. [2020-10-13 15:42:50,527 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:42:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:42:52,977 INFO L93 Difference]: Finished difference Result 33558 states and 65974 transitions. [2020-10-13 15:42:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 15:42:52,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2020-10-13 15:42:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:42:53,065 INFO L225 Difference]: With dead ends: 33558 [2020-10-13 15:42:53,066 INFO L226 Difference]: Without dead ends: 18140 [2020-10-13 15:42:53,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:42:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18140 states. [2020-10-13 15:42:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18140 to 17256. [2020-10-13 15:42:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17256 states. [2020-10-13 15:42:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17256 states to 17256 states and 31227 transitions. [2020-10-13 15:42:54,878 INFO L78 Accepts]: Start accepts. Automaton has 17256 states and 31227 transitions. Word has length 96 [2020-10-13 15:42:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:42:54,878 INFO L479 AbstractCegarLoop]: Abstraction has 17256 states and 31227 transitions. [2020-10-13 15:42:54,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:42:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 17256 states and 31227 transitions. [2020-10-13 15:42:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 15:42:54,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:42:54,886 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:42:54,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 15:42:54,886 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:42:54,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:42:54,887 INFO L82 PathProgramCache]: Analyzing trace with hash 340600442, now seen corresponding path program 1 times [2020-10-13 15:42:54,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:42:54,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132885006] [2020-10-13 15:42:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:42:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:42:54,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:54,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:55,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:55,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:55,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:55,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:56,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:56,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:56,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:42:59,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:42:59,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 15:42:59,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 15:42:59,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 15:42:59,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:42:59,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 15:42:59,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 15:42:59,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 15:42:59,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:00,047 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:43:00,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:43:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:00,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:00,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:00,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:43:00,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:00,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:43:00,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:00,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:00,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:00,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:00,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:00,167 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 15:43:00,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 15:43:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:00,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:00,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:00,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:00,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 15:43:00,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:43:00,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-13 15:43:00,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:00,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 15:43:00,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 15:43:00,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 15:43:00,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:00,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:43:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:00,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:00,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:00,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:43:00,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:00,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 15:43:00,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:00,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:43:00,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 15:43:00,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 15:43:00,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:00,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 15:43:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:00,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:00,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:00,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 15:43:00,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:00,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:43:00,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:00,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:00,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 15:43:00,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:00,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 15:43:00,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132885006] [2020-10-13 15:43:00,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:43:00,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 15:43:00,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53149877] [2020-10-13 15:43:00,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 15:43:00,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:43:00,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 15:43:00,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:43:00,363 INFO L87 Difference]: Start difference. First operand 17256 states and 31227 transitions. Second operand 8 states. [2020-10-13 15:43:00,504 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 15:43:00,724 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 15:43:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:43:06,201 INFO L93 Difference]: Finished difference Result 60685 states and 116018 transitions. [2020-10-13 15:43:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 15:43:06,202 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2020-10-13 15:43:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:43:06,359 INFO L225 Difference]: With dead ends: 60685 [2020-10-13 15:43:06,359 INFO L226 Difference]: Without dead ends: 43451 [2020-10-13 15:43:06,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-13 15:43:06,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43451 states. [2020-10-13 15:43:11,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43451 to 38609. [2020-10-13 15:43:11,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38609 states. [2020-10-13 15:43:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38609 states to 38609 states and 68958 transitions. [2020-10-13 15:43:12,231 INFO L78 Accepts]: Start accepts. Automaton has 38609 states and 68958 transitions. Word has length 102 [2020-10-13 15:43:12,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:43:12,231 INFO L479 AbstractCegarLoop]: Abstraction has 38609 states and 68958 transitions. [2020-10-13 15:43:12,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 15:43:12,231 INFO L276 IsEmpty]: Start isEmpty. Operand 38609 states and 68958 transitions. [2020-10-13 15:43:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 15:43:12,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:43:12,239 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:43:12,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 15:43:12,239 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:43:12,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:43:12,240 INFO L82 PathProgramCache]: Analyzing trace with hash -542908548, now seen corresponding path program 1 times [2020-10-13 15:43:12,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:43:12,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269015297] [2020-10-13 15:43:12,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:43:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:12,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:12,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:12,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:12,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:12,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:13,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:13,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:13,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:13,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:17,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:17,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 15:43:17,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 15:43:17,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 15:43:17,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:43:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:43:17,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:43:17,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:17,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:43:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:17,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:17,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:17,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:43:17,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:17,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:43:17,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:17,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:17,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:17,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:17,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:17,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 15:43:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:17,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:17,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:17,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 15:43:17,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:17,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:43:17,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:17,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:17,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 15:43:17,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:17,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:17,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:43:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:17,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:17,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:17,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:43:17,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:17,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:43:17,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:17,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:17,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:17,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:17,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:17,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 15:43:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:17,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:17,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:17,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 15:43:17,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:17,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:43:17,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:17,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:17,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 15:43:17,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:17,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 15:43:17,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269015297] [2020-10-13 15:43:17,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:43:17,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 15:43:17,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123707742] [2020-10-13 15:43:17,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:43:17,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:43:17,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:43:17,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:43:17,617 INFO L87 Difference]: Start difference. First operand 38609 states and 68958 transitions. Second operand 6 states. [2020-10-13 15:43:17,748 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:43:21,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:43:21,601 INFO L93 Difference]: Finished difference Result 69078 states and 124264 transitions. [2020-10-13 15:43:21,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:43:21,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-13 15:43:21,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:43:21,706 INFO L225 Difference]: With dead ends: 69078 [2020-10-13 15:43:21,707 INFO L226 Difference]: Without dead ends: 30491 [2020-10-13 15:43:21,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:43:22,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30491 states. [2020-10-13 15:43:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30491 to 29275. [2020-10-13 15:43:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29275 states. [2020-10-13 15:43:24,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29275 states to 29275 states and 53875 transitions. [2020-10-13 15:43:24,932 INFO L78 Accepts]: Start accepts. Automaton has 29275 states and 53875 transitions. Word has length 102 [2020-10-13 15:43:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:43:24,932 INFO L479 AbstractCegarLoop]: Abstraction has 29275 states and 53875 transitions. [2020-10-13 15:43:24,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:43:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 29275 states and 53875 transitions. [2020-10-13 15:43:24,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 15:43:24,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:43:24,941 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:43:24,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 15:43:24,941 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:43:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:43:24,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1306527523, now seen corresponding path program 1 times [2020-10-13 15:43:24,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:43:24,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147300841] [2020-10-13 15:43:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:43:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:24,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:25,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:25,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:25,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:25,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:25,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:25,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:25,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:25,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:25,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:29,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:29,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-13 15:43:29,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:43:29,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 15:43:29,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:29,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:43:29,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 15:43:29,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:43:29,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:30,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:43:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:30,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:30,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:30,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:43:30,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:30,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:43:30,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:30,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:30,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:30,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:30,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:30,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 15:43:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:30,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:30,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:30,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:43:30,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:30,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:43:30,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:30,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:30,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:30,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:30,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:30,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 15:43:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:30,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:30,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:30,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 15:43:30,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:30,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:43:30,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:43:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:43:30,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:30,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 15:43:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:30,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:30,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:30,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:30,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 15:43:30,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:43:30,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:43:30,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:30,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:30,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 15:43:30,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:30,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:30,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-13 15:43:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:30,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:30,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:30,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 15:43:30,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:30,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:43:30,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 15:43:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:30,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 15:43:30,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147300841] [2020-10-13 15:43:30,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:43:30,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 15:43:30,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511659246] [2020-10-13 15:43:30,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:43:30,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:43:30,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:43:30,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:43:30,267 INFO L87 Difference]: Start difference. First operand 29275 states and 53875 transitions. Second operand 6 states. [2020-10-13 15:43:30,616 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:43:35,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:43:35,521 INFO L93 Difference]: Finished difference Result 59016 states and 115179 transitions. [2020-10-13 15:43:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 15:43:35,522 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2020-10-13 15:43:35,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:43:35,626 INFO L225 Difference]: With dead ends: 59016 [2020-10-13 15:43:35,626 INFO L226 Difference]: Without dead ends: 30036 [2020-10-13 15:43:35,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:43:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30036 states. [2020-10-13 15:43:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30036 to 28874. [2020-10-13 15:43:38,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28874 states. [2020-10-13 15:43:38,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28874 states to 28874 states and 52460 transitions. [2020-10-13 15:43:38,606 INFO L78 Accepts]: Start accepts. Automaton has 28874 states and 52460 transitions. Word has length 128 [2020-10-13 15:43:38,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:43:38,607 INFO L479 AbstractCegarLoop]: Abstraction has 28874 states and 52460 transitions. [2020-10-13 15:43:38,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:43:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 28874 states and 52460 transitions. [2020-10-13 15:43:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 15:43:38,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:43:38,615 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:43:38,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 15:43:38,615 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:43:38,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:43:38,616 INFO L82 PathProgramCache]: Analyzing trace with hash -94528932, now seen corresponding path program 1 times [2020-10-13 15:43:38,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:43:38,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102038826] [2020-10-13 15:43:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:43:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:38,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:38,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:38,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:38,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:38,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:39,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:39,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:39,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:39,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:39,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:39,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:40,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:44,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:44,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 15:43:44,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:43:44,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5391 [2020-10-13 15:43:44,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:44,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:43:44,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-13 15:43:44,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 15:43:44,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:44,176 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:43:44,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:43:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:44,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:44,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:44,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:43:44,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:44,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:43:44,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:44,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:44,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:44,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:44,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:44,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 15:43:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:44,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:44,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:44,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 15:43:44,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:44,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:43:44,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:44,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:44,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:44,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:44,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:44,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:43:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:44,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:44,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:44,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:43:44,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:44,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:43:44,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:44,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:44,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:44,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:44,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:44,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 15:43:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:44,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:44,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:44,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 15:43:44,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:44,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:43:44,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:44,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:43:44,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:44,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:43:44,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:44,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-13 15:43:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:43:44,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:43:44,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:43:44,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 15:43:44,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:43:44,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:43:44,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:43:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:43:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:43:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 15:43:44,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:43:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 15:43:44,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102038826] [2020-10-13 15:43:44,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:43:44,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 15:43:44,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351737402] [2020-10-13 15:43:44,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 15:43:44,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:43:44,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 15:43:44,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:43:44,478 INFO L87 Difference]: Start difference. First operand 28874 states and 52460 transitions. Second operand 8 states. [2020-10-13 15:43:44,678 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 15:43:44,879 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:43:51,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:43:51,808 INFO L93 Difference]: Finished difference Result 82247 states and 189945 transitions. [2020-10-13 15:43:51,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 15:43:51,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-10-13 15:43:51,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:43:52,096 INFO L225 Difference]: With dead ends: 82247 [2020-10-13 15:43:52,096 INFO L226 Difference]: Without dead ends: 53742 [2020-10-13 15:43:52,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-13 15:43:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53742 states. [2020-10-13 15:44:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53742 to 50024. [2020-10-13 15:44:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50024 states. [2020-10-13 15:44:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50024 states to 50024 states and 108548 transitions. [2020-10-13 15:44:03,154 INFO L78 Accepts]: Start accepts. Automaton has 50024 states and 108548 transitions. Word has length 112 [2020-10-13 15:44:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:44:03,154 INFO L479 AbstractCegarLoop]: Abstraction has 50024 states and 108548 transitions. [2020-10-13 15:44:03,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 15:44:03,154 INFO L276 IsEmpty]: Start isEmpty. Operand 50024 states and 108548 transitions. [2020-10-13 15:44:03,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 15:44:03,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:44:03,161 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:44:03,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 15:44:03,162 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:44:03,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:44:03,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1353914053, now seen corresponding path program 1 times [2020-10-13 15:44:03,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:44:03,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414367980] [2020-10-13 15:44:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:44:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:03,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:03,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:03,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:03,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:03,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:03,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:06,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:06,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:06,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:08,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:08,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 15:44:08,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 15:44:08,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 15:44:08,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:08,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:44:08,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-13 15:44:08,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 15:44:08,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:44:08,342 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:44:08,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:44:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:08,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:08,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:08,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:44:08,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:44:08,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 15:44:08,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:08,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:44:08,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:44:08,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:44:08,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:44:08,515 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 15:44:08,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 15:44:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:08,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:08,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:08,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 15:44:08,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:44:08,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 15:44:08,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:08,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:44:08,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:44:08,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:44:08,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:44:08,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:44:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:08,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:08,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:08,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:44:08,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:44:08,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:44:08,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:08,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:44:08,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:44:08,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:44:08,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:44:08,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 15:44:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:08,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:08,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:08,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 15:44:08,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:44:08,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:44:08,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:08,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:44:08,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:44:08,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:44:08,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:44:08,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-13 15:44:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:08,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:08,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:08,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 15:44:08,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:44:08,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 15:44:08,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:08,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:44:08,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:44:08,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 15:44:08,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:44:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 15:44:08,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414367980] [2020-10-13 15:44:08,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:44:08,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 15:44:08,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272684191] [2020-10-13 15:44:08,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 15:44:08,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:44:08,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 15:44:08,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:44:08,797 INFO L87 Difference]: Start difference. First operand 50024 states and 108548 transitions. Second operand 7 states. [2020-10-13 15:44:08,936 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:44:16,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:44:16,216 INFO L93 Difference]: Finished difference Result 97682 states and 232496 transitions. [2020-10-13 15:44:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 15:44:16,217 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2020-10-13 15:44:16,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:44:16,509 INFO L225 Difference]: With dead ends: 97682 [2020-10-13 15:44:16,509 INFO L226 Difference]: Without dead ends: 48875 [2020-10-13 15:44:17,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 15:44:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48875 states. [2020-10-13 15:44:26,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48875 to 47441. [2020-10-13 15:44:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47441 states. [2020-10-13 15:44:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47441 states to 47441 states and 97152 transitions. [2020-10-13 15:44:27,674 INFO L78 Accepts]: Start accepts. Automaton has 47441 states and 97152 transitions. Word has length 114 [2020-10-13 15:44:27,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:44:27,674 INFO L479 AbstractCegarLoop]: Abstraction has 47441 states and 97152 transitions. [2020-10-13 15:44:27,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 15:44:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 47441 states and 97152 transitions. [2020-10-13 15:44:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 15:44:27,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:44:27,680 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:44:27,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 15:44:27,681 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:44:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:44:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash 214288293, now seen corresponding path program 1 times [2020-10-13 15:44:27,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:44:27,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789145171] [2020-10-13 15:44:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:44:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:27,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:27,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:27,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:27,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:28,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:28,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:29,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:29,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:29,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:29,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:32,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:32,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 15:44:32,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:44:32,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 15:44:32,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:32,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:44:32,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 115 [2020-10-13 15:44:32,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 15:44:32,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:44:32,852 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 15:44:32,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:44:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:32,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:32,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:32,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:44:32,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:44:32,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:44:32,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:32,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:44:32,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:44:32,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:44:32,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:44:32,973 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 15:44:32,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 15:44:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:32,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:32,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:32,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 15:44:32,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:44:32,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:44:32,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:32,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:44:32,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:44:32,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:44:32,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:44:33,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:44:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:33,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:33,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:33,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 15:44:33,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:44:33,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:44:33,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:33,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:44:33,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:44:33,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:44:33,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:44:33,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 15:44:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:33,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:33,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:33,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 15:44:33,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:44:33,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:44:33,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:33,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:44:33,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:44:33,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:44:33,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:44:33,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-13 15:44:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:44:33,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:44:33,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:44:33,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 15:44:33,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:44:33,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:44:33,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:44:33,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:44:33,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:44:33,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:44:33,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:44:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 15:44:33,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789145171] [2020-10-13 15:44:33,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:44:33,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 15:44:33,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505816906] [2020-10-13 15:44:33,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 15:44:33,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:44:33,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 15:44:33,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:44:33,149 INFO L87 Difference]: Start difference. First operand 47441 states and 97152 transitions. Second operand 7 states. [2020-10-13 15:44:33,436 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 15:44:40,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:44:40,874 INFO L93 Difference]: Finished difference Result 95553 states and 223292 transitions. [2020-10-13 15:44:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 15:44:40,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2020-10-13 15:44:40,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:44:41,131 INFO L225 Difference]: With dead ends: 95553 [2020-10-13 15:44:41,132 INFO L226 Difference]: Without dead ends: 49460