/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:53:09,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:53:09,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:53:09,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:53:09,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:53:09,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:53:09,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:53:09,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:53:09,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:53:09,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:53:09,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:53:09,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:53:09,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:53:09,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:53:09,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:53:09,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:53:09,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:53:09,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:53:09,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:53:09,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:53:09,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:53:09,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:53:09,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:53:09,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:53:09,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:53:09,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:53:09,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:53:09,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:53:09,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:53:09,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:53:09,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:53:09,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:53:09,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:53:09,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:53:09,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:53:09,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:53:09,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:53:09,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:53:09,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:53:09,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:53:09,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:53:09,984 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 19:53:10,020 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:53:10,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:53:10,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:53:10,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:53:10,023 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:53:10,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:53:10,023 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:53:10,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:53:10,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:53:10,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:53:10,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:53:10,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:53:10,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:53:10,024 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:53:10,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:53:10,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:53:10,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:53:10,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:53:10,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:53:10,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:53:10,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:53:10,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:53:10,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:53:10,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:53:10,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:53:10,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:53:10,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:53:10,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:53:10,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:53:10,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:53:10,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:53:10,333 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:53:10,338 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:53:10,340 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:53:10,340 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:53:10,341 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 19:53:10,411 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffa04cd26/c7280ccbd8d540c69e7ef69ab545a7a4/FLAGf9408de10 [2020-10-12 19:53:10,886 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:53:10,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 19:53:10,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffa04cd26/c7280ccbd8d540c69e7ef69ab545a7a4/FLAGf9408de10 [2020-10-12 19:53:11,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffa04cd26/c7280ccbd8d540c69e7ef69ab545a7a4 [2020-10-12 19:53:11,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:53:11,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:53:11,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:53:11,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:53:11,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:53:11,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:53:11" (1/1) ... [2020-10-12 19:53:11,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@546c585d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:11, skipping insertion in model container [2020-10-12 19:53:11,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:53:11" (1/1) ... [2020-10-12 19:53:11,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:53:11,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:53:11,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:53:11,560 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:53:11,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:53:11,723 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:53:11,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:11 WrapperNode [2020-10-12 19:53:11,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:53:11,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:53:11,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:53:11,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:53:11,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:11" (1/1) ... [2020-10-12 19:53:11,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:11" (1/1) ... [2020-10-12 19:53:11,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:11" (1/1) ... [2020-10-12 19:53:11,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:11" (1/1) ... [2020-10-12 19:53:11,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:11" (1/1) ... [2020-10-12 19:53:11,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:11" (1/1) ... [2020-10-12 19:53:11,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:11" (1/1) ... [2020-10-12 19:53:11,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:53:11,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:53:11,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:53:11,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:53:11,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:53:11,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:53:11,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:53:11,829 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:53:11,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:53:11,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:53:11,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:53:11,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:53:11,830 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:53:11,830 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:53:11,830 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:53:11,830 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:53:11,830 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:53:11,830 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:53:11,830 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:53:11,831 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:53:11,831 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:53:11,831 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:53:11,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:53:11,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:53:11,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:53:12,349 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:53:12,349 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:53:12,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:53:12 BoogieIcfgContainer [2020-10-12 19:53:12,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:53:12,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:53:12,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:53:12,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:53:12,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:53:11" (1/3) ... [2020-10-12 19:53:12,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b7425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:53:12, skipping insertion in model container [2020-10-12 19:53:12,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:11" (2/3) ... [2020-10-12 19:53:12,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b7425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:53:12, skipping insertion in model container [2020-10-12 19:53:12,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:53:12" (3/3) ... [2020-10-12 19:53:12,367 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 19:53:12,378 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:53:12,389 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:53:12,403 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:53:12,434 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:53:12,434 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:53:12,434 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:53:12,434 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:53:12,435 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:53:12,435 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:53:12,435 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:53:12,435 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:53:12,459 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2020-10-12 19:53:12,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 19:53:12,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:12,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:12,470 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:12,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:12,474 INFO L82 PathProgramCache]: Analyzing trace with hash 665769091, now seen corresponding path program 1 times [2020-10-12 19:53:12,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:12,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687577380] [2020-10-12 19:53:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:12,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:13,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:13,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:13,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:13,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 19:53:13,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:53:13,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-12 19:53:13,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:13,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:53:13,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:53:13,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 19:53:13,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:53:14,090 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-12 19:53:14,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:14,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:14,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:14,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:14,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:14,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:53:14,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:14,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:14,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:14,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:14,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:53:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:14,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687577380] [2020-10-12 19:53:14,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:14,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:53:14,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684750676] [2020-10-12 19:53:14,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:53:14,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:14,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:53:14,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:53:14,154 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 6 states. [2020-10-12 19:53:14,328 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-12 19:53:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:14,754 INFO L93 Difference]: Finished difference Result 329 states and 517 transitions. [2020-10-12 19:53:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:53:14,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-12 19:53:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:14,780 INFO L225 Difference]: With dead ends: 329 [2020-10-12 19:53:14,781 INFO L226 Difference]: Without dead ends: 252 [2020-10-12 19:53:14,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:53:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-12 19:53:14,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 136. [2020-10-12 19:53:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-12 19:53:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 201 transitions. [2020-10-12 19:53:14,848 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 201 transitions. Word has length 41 [2020-10-12 19:53:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:14,849 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 201 transitions. [2020-10-12 19:53:14,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:53:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 201 transitions. [2020-10-12 19:53:14,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 19:53:14,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:14,852 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] [2020-10-12 19:53:14,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:53:14,852 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:14,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:14,853 INFO L82 PathProgramCache]: Analyzing trace with hash -854527449, now seen corresponding path program 1 times [2020-10-12 19:53:14,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:14,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931126887] [2020-10-12 19:53:14,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:14,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:14,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:15,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:15,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:15,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 19:53:15,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:53:15,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-10-12 19:53:15,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:15,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:53:15,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 19:53:15,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:53:15,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:15,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:15,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:15,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:15,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:15,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:15,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:53:15,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:15,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:15,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:15,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:15,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:15,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931126887] [2020-10-12 19:53:15,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:15,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:53:15,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076695796] [2020-10-12 19:53:15,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:53:15,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:15,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:53:15,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:53:15,548 INFO L87 Difference]: Start difference. First operand 136 states and 201 transitions. Second operand 5 states. [2020-10-12 19:53:16,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:16,083 INFO L93 Difference]: Finished difference Result 252 states and 382 transitions. [2020-10-12 19:53:16,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:53:16,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-10-12 19:53:16,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:16,086 INFO L225 Difference]: With dead ends: 252 [2020-10-12 19:53:16,086 INFO L226 Difference]: Without dead ends: 250 [2020-10-12 19:53:16,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:53:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-12 19:53:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 140. [2020-10-12 19:53:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-12 19:53:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 205 transitions. [2020-10-12 19:53:16,107 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 205 transitions. Word has length 42 [2020-10-12 19:53:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:16,108 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 205 transitions. [2020-10-12 19:53:16,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:53:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 205 transitions. [2020-10-12 19:53:16,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 19:53:16,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:16,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:16,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:53:16,111 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:16,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:16,111 INFO L82 PathProgramCache]: Analyzing trace with hash -710927438, now seen corresponding path program 1 times [2020-10-12 19:53:16,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:16,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095556499] [2020-10-12 19:53:16,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:16,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:16,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:16,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:16,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:16,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 19:53:16,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:53:16,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-12 19:53:16,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:16,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:16,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 19:53:16,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 19:53:16,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:16,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:16,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:16,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:16,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:16,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:16,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:53:16,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:16,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:16,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:16,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:16,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:53:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:16,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095556499] [2020-10-12 19:53:16,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:16,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:53:16,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533712148] [2020-10-12 19:53:16,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:53:16,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:16,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:53:16,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:53:16,687 INFO L87 Difference]: Start difference. First operand 140 states and 205 transitions. Second operand 4 states. [2020-10-12 19:53:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:17,041 INFO L93 Difference]: Finished difference Result 340 states and 515 transitions. [2020-10-12 19:53:17,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:53:17,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-12 19:53:17,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:17,043 INFO L225 Difference]: With dead ends: 340 [2020-10-12 19:53:17,044 INFO L226 Difference]: Without dead ends: 224 [2020-10-12 19:53:17,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:53:17,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-12 19:53:17,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2020-10-12 19:53:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-12 19:53:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 331 transitions. [2020-10-12 19:53:17,066 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 331 transitions. Word has length 43 [2020-10-12 19:53:17,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:17,066 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 331 transitions. [2020-10-12 19:53:17,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:53:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 331 transitions. [2020-10-12 19:53:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 19:53:17,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:17,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:17,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:53:17,069 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:17,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:17,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1433150759, now seen corresponding path program 1 times [2020-10-12 19:53:17,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:17,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261263522] [2020-10-12 19:53:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:17,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:17,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:17,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:17,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 19:53:17,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 19:53:17,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-12 19:53:17,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:17,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:17,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:53:17,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 19:53:17,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:53:17,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:17,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:17,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:17,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:17,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:17,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:53:17,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:17,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:17,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:17,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:17,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:17,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261263522] [2020-10-12 19:53:17,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:17,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:53:17,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49216353] [2020-10-12 19:53:17,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:53:17,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:17,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:53:17,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:53:17,404 INFO L87 Difference]: Start difference. First operand 222 states and 331 transitions. Second operand 4 states. [2020-10-12 19:53:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:17,725 INFO L93 Difference]: Finished difference Result 590 states and 897 transitions. [2020-10-12 19:53:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:53:17,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-12 19:53:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:17,728 INFO L225 Difference]: With dead ends: 590 [2020-10-12 19:53:17,728 INFO L226 Difference]: Without dead ends: 392 [2020-10-12 19:53:17,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:53:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-12 19:53:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 390. [2020-10-12 19:53:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-12 19:53:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 585 transitions. [2020-10-12 19:53:17,756 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 585 transitions. Word has length 44 [2020-10-12 19:53:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:17,756 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 585 transitions. [2020-10-12 19:53:17,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:53:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 585 transitions. [2020-10-12 19:53:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 19:53:17,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:17,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:17,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:53:17,759 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:17,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:17,759 INFO L82 PathProgramCache]: Analyzing trace with hash 949631832, now seen corresponding path program 1 times [2020-10-12 19:53:17,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:17,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115863466] [2020-10-12 19:53:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:17,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:17,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:17,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:18,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:18,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 19:53:18,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:53:18,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-12 19:53:18,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:18,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:53:18,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:53:18,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 19:53:18,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:18,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:18,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:18,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:18,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:18,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:18,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:53:18,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:18,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:18,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:18,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:18,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:18,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115863466] [2020-10-12 19:53:18,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:18,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:53:18,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695771375] [2020-10-12 19:53:18,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:53:18,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:18,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:53:18,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:53:18,292 INFO L87 Difference]: Start difference. First operand 390 states and 585 transitions. Second operand 5 states. [2020-10-12 19:53:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:18,724 INFO L93 Difference]: Finished difference Result 780 states and 1188 transitions. [2020-10-12 19:53:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:53:18,725 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-10-12 19:53:18,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:18,729 INFO L225 Difference]: With dead ends: 780 [2020-10-12 19:53:18,729 INFO L226 Difference]: Without dead ends: 582 [2020-10-12 19:53:18,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:53:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2020-10-12 19:53:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 578. [2020-10-12 19:53:18,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-12 19:53:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 875 transitions. [2020-10-12 19:53:18,763 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 875 transitions. Word has length 44 [2020-10-12 19:53:18,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:18,763 INFO L479 AbstractCegarLoop]: Abstraction has 578 states and 875 transitions. [2020-10-12 19:53:18,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:53:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 875 transitions. [2020-10-12 19:53:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 19:53:18,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:18,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:18,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:53:18,766 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:18,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:18,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2694807, now seen corresponding path program 1 times [2020-10-12 19:53:18,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:18,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341992271] [2020-10-12 19:53:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:18,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:18,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:18,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:19,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:19,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:19,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 19:53:19,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:53:19,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-12 19:53:19,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:19,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:53:19,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:53:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 19:53:19,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:53:19,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:19,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:19,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:19,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:19,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:19,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 19:53:19,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:19,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:19,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:19,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:53:19,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:19,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341992271] [2020-10-12 19:53:19,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:19,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:53:19,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036814502] [2020-10-12 19:53:19,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:53:19,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:19,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:53:19,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:53:19,943 INFO L87 Difference]: Start difference. First operand 578 states and 875 transitions. Second operand 7 states. [2020-10-12 19:53:20,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:20,688 INFO L93 Difference]: Finished difference Result 1682 states and 2539 transitions. [2020-10-12 19:53:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:53:20,688 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-10-12 19:53:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:20,695 INFO L225 Difference]: With dead ends: 1682 [2020-10-12 19:53:20,696 INFO L226 Difference]: Without dead ends: 1128 [2020-10-12 19:53:20,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:53:20,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2020-10-12 19:53:20,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 601. [2020-10-12 19:53:20,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2020-10-12 19:53:20,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 909 transitions. [2020-10-12 19:53:20,752 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 909 transitions. Word has length 45 [2020-10-12 19:53:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:20,753 INFO L479 AbstractCegarLoop]: Abstraction has 601 states and 909 transitions. [2020-10-12 19:53:20,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:53:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 909 transitions. [2020-10-12 19:53:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 19:53:20,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:20,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:20,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:53:20,755 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:20,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:20,755 INFO L82 PathProgramCache]: Analyzing trace with hash -558152841, now seen corresponding path program 1 times [2020-10-12 19:53:20,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:20,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066638521] [2020-10-12 19:53:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:20,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:20,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:20,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:20,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:21,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:22,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:22,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 19:53:22,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:53:22,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1320 [2020-10-12 19:53:22,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:22,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:53:22,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:53:22,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 19:53:22,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:22,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:22,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:22,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:22,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:22,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:22,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:53:22,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:22,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:53:22,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:22,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066638521] [2020-10-12 19:53:22,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:22,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:53:22,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923134699] [2020-10-12 19:53:22,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:53:22,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:22,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:53:22,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:53:22,239 INFO L87 Difference]: Start difference. First operand 601 states and 909 transitions. Second operand 7 states. [2020-10-12 19:53:22,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:22,969 INFO L93 Difference]: Finished difference Result 1527 states and 2322 transitions. [2020-10-12 19:53:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:53:22,970 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-10-12 19:53:22,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:22,980 INFO L225 Difference]: With dead ends: 1527 [2020-10-12 19:53:22,980 INFO L226 Difference]: Without dead ends: 1153 [2020-10-12 19:53:22,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:53:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2020-10-12 19:53:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 597. [2020-10-12 19:53:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 597 states. [2020-10-12 19:53:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 902 transitions. [2020-10-12 19:53:23,072 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 902 transitions. Word has length 45 [2020-10-12 19:53:23,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:23,073 INFO L479 AbstractCegarLoop]: Abstraction has 597 states and 902 transitions. [2020-10-12 19:53:23,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:53:23,073 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 902 transitions. [2020-10-12 19:53:23,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 19:53:23,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:23,076 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:23,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:53:23,076 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:23,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:23,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1162977275, now seen corresponding path program 1 times [2020-10-12 19:53:23,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:23,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454173666] [2020-10-12 19:53:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:23,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:23,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:23,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:23,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:23,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:24,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:24,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 19:53:24,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:53:24,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1120 [2020-10-12 19:53:24,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:24,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:53:24,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:53:24,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:53:24,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:53:24,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:24,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:24,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:24,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:24,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:24,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:53:24,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:24,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:24,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:24,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:24,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:24,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454173666] [2020-10-12 19:53:24,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:53:24,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 19:53:24,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964556144] [2020-10-12 19:53:24,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:53:24,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:24,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:53:24,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:53:24,447 INFO L87 Difference]: Start difference. First operand 597 states and 902 transitions. Second operand 6 states. [2020-10-12 19:53:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:24,873 INFO L93 Difference]: Finished difference Result 985 states and 1502 transitions. [2020-10-12 19:53:24,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:53:24,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-12 19:53:24,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:24,878 INFO L225 Difference]: With dead ends: 985 [2020-10-12 19:53:24,878 INFO L226 Difference]: Without dead ends: 787 [2020-10-12 19:53:24,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:53:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2020-10-12 19:53:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 781. [2020-10-12 19:53:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2020-10-12 19:53:24,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1188 transitions. [2020-10-12 19:53:24,967 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1188 transitions. Word has length 61 [2020-10-12 19:53:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:24,970 INFO L479 AbstractCegarLoop]: Abstraction has 781 states and 1188 transitions. [2020-10-12 19:53:24,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:53:24,970 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1188 transitions. [2020-10-12 19:53:24,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:53:24,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:24,972 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:24,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:53:24,973 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:24,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:24,973 INFO L82 PathProgramCache]: Analyzing trace with hash 856822917, now seen corresponding path program 1 times [2020-10-12 19:53:24,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:24,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725501978] [2020-10-12 19:53:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:25,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:25,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:25,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:25,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:25,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:26,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:28,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:28,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:53:28,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:53:28,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3376 [2020-10-12 19:53:28,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:28,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:53:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:53:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:53:28,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:28,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:28,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:28,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:28,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:28,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:28,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 19:53:28,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:28,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:28,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:28,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:53:28,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:28,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725501978] [2020-10-12 19:53:28,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:53:28,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:53:28,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592188858] [2020-10-12 19:53:28,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:53:28,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:28,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:53:28,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:53:28,583 INFO L87 Difference]: Start difference. First operand 781 states and 1188 transitions. Second operand 8 states. [2020-10-12 19:53:29,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:29,595 INFO L93 Difference]: Finished difference Result 3857 states and 5845 transitions. [2020-10-12 19:53:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:53:29,596 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-10-12 19:53:29,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:29,617 INFO L225 Difference]: With dead ends: 3857 [2020-10-12 19:53:29,617 INFO L226 Difference]: Without dead ends: 3479 [2020-10-12 19:53:29,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:53:29,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2020-10-12 19:53:29,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 1745. [2020-10-12 19:53:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1745 states. [2020-10-12 19:53:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2681 transitions. [2020-10-12 19:53:29,828 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2681 transitions. Word has length 62 [2020-10-12 19:53:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:29,829 INFO L479 AbstractCegarLoop]: Abstraction has 1745 states and 2681 transitions. [2020-10-12 19:53:29,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:53:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2681 transitions. [2020-10-12 19:53:29,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:53:29,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:29,851 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:53:29,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:53:29,852 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:29,852 INFO L82 PathProgramCache]: Analyzing trace with hash 369987086, now seen corresponding path program 1 times [2020-10-12 19:53:29,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:29,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469545204] [2020-10-12 19:53:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:29,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:29,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:29,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:29,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:30,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:30,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:31,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:34,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:34,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:53:34,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:53:34,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:53:34,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:53:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:53:34,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 19:53:34,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:35,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:35,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:35,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:35,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:35,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:35,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:53:35,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:35,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:35,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:53:35,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:35,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469545204] [2020-10-12 19:53:35,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:53:35,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:53:35,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164323343] [2020-10-12 19:53:35,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:53:35,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:35,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:53:35,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:53:35,117 INFO L87 Difference]: Start difference. First operand 1745 states and 2681 transitions. Second operand 8 states. [2020-10-12 19:53:36,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:36,351 INFO L93 Difference]: Finished difference Result 7257 states and 11053 transitions. [2020-10-12 19:53:36,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:53:36,352 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-10-12 19:53:36,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:36,379 INFO L225 Difference]: With dead ends: 7257 [2020-10-12 19:53:36,379 INFO L226 Difference]: Without dead ends: 5559 [2020-10-12 19:53:36,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:53:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5559 states. [2020-10-12 19:53:36,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5559 to 2801. [2020-10-12 19:53:36,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2801 states. [2020-10-12 19:53:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2801 states to 2801 states and 4161 transitions. [2020-10-12 19:53:36,696 INFO L78 Accepts]: Start accepts. Automaton has 2801 states and 4161 transitions. Word has length 62 [2020-10-12 19:53:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:36,696 INFO L479 AbstractCegarLoop]: Abstraction has 2801 states and 4161 transitions. [2020-10-12 19:53:36,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:53:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2801 states and 4161 transitions. [2020-10-12 19:53:36,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:53:36,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:36,699 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 19:53:36,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:53:36,700 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:36,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:36,700 INFO L82 PathProgramCache]: Analyzing trace with hash 423089061, now seen corresponding path program 1 times [2020-10-12 19:53:36,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:36,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6541073] [2020-10-12 19:53:36,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:36,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:36,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:36,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:36,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:37,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:37,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:40,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:40,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:53:40,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:53:40,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3888 [2020-10-12 19:53:40,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:40,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:53:40,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:53:40,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:53:40,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:40,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:40,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:40,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:40,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:40,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:40,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 19:53:40,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:40,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:40,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:40,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:53:40,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:53:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:40,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6541073] [2020-10-12 19:53:40,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:53:40,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:53:40,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598711435] [2020-10-12 19:53:40,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:53:40,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:40,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:53:40,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:53:40,802 INFO L87 Difference]: Start difference. First operand 2801 states and 4161 transitions. Second operand 8 states. [2020-10-12 19:53:40,965 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-12 19:53:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:42,092 INFO L93 Difference]: Finished difference Result 6735 states and 9947 transitions. [2020-10-12 19:53:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:53:42,093 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-10-12 19:53:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:42,120 INFO L225 Difference]: With dead ends: 6735 [2020-10-12 19:53:42,120 INFO L226 Difference]: Without dead ends: 5683 [2020-10-12 19:53:42,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:53:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5683 states. [2020-10-12 19:53:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5683 to 3193. [2020-10-12 19:53:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3193 states. [2020-10-12 19:53:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 4693 transitions. [2020-10-12 19:53:42,481 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 4693 transitions. Word has length 62 [2020-10-12 19:53:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:42,481 INFO L479 AbstractCegarLoop]: Abstraction has 3193 states and 4693 transitions. [2020-10-12 19:53:42,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:53:42,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 4693 transitions. [2020-10-12 19:53:42,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:53:42,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:42,485 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 19:53:42,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:53:42,485 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:42,486 INFO L82 PathProgramCache]: Analyzing trace with hash -634843652, now seen corresponding path program 1 times [2020-10-12 19:53:42,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:42,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058540002] [2020-10-12 19:53:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:42,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:42,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:42,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:42,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:42,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:42,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:42,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:42,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:44,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:47,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:47,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:53:47,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:53:47,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:53:47,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:47,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:53:47,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:53:47,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:53:47,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:47,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:47,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:47,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:47,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:47,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:47,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:53:47,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:47,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:53:47,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:47,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:53:47,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:47,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058540002] [2020-10-12 19:53:47,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:53:47,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:53:47,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7207023] [2020-10-12 19:53:47,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:53:47,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:47,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:53:47,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:53:47,855 INFO L87 Difference]: Start difference. First operand 3193 states and 4693 transitions. Second operand 12 states. [2020-10-12 19:53:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:52,810 INFO L93 Difference]: Finished difference Result 35511 states and 51680 transitions. [2020-10-12 19:53:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 19:53:52,811 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2020-10-12 19:53:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:52,900 INFO L225 Difference]: With dead ends: 35511 [2020-10-12 19:53:52,901 INFO L226 Difference]: Without dead ends: 32365 [2020-10-12 19:53:52,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=683, Invalid=2739, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 19:53:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32365 states. [2020-10-12 19:53:55,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32365 to 22377. [2020-10-12 19:53:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22377 states. [2020-10-12 19:53:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22377 states to 22377 states and 32777 transitions. [2020-10-12 19:53:55,083 INFO L78 Accepts]: Start accepts. Automaton has 22377 states and 32777 transitions. Word has length 64 [2020-10-12 19:53:55,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:55,084 INFO L479 AbstractCegarLoop]: Abstraction has 22377 states and 32777 transitions. [2020-10-12 19:53:55,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:53:55,084 INFO L276 IsEmpty]: Start isEmpty. Operand 22377 states and 32777 transitions. [2020-10-12 19:53:55,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:53:55,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:55,089 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 19:53:55,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:53:55,089 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:55,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:55,090 INFO L82 PathProgramCache]: Analyzing trace with hash 982661239, now seen corresponding path program 1 times [2020-10-12 19:53:55,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:55,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548544291] [2020-10-12 19:53:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:55,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:55,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:55,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:55,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:55,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:57,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:57,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:53:57,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:53:57,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2630 [2020-10-12 19:53:57,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:57,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:53:57,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:53:57,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 19:53:57,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:58,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:58,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:58,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:58,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:58,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:58,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:53:58,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:58,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:58,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548544291] [2020-10-12 19:53:58,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:53:58,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:53:58,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117422221] [2020-10-12 19:53:58,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:53:58,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:58,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:53:58,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:53:58,045 INFO L87 Difference]: Start difference. First operand 22377 states and 32777 transitions. Second operand 10 states. [2020-10-12 19:53:59,554 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-10-12 19:54:07,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:07,105 INFO L93 Difference]: Finished difference Result 86879 states and 126454 transitions. [2020-10-12 19:54:07,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 19:54:07,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-10-12 19:54:07,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:07,241 INFO L225 Difference]: With dead ends: 86879 [2020-10-12 19:54:07,242 INFO L226 Difference]: Without dead ends: 78377 [2020-10-12 19:54:07,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2020-10-12 19:54:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78377 states. [2020-10-12 19:54:10,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78377 to 27529. [2020-10-12 19:54:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27529 states. [2020-10-12 19:54:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27529 states to 27529 states and 40273 transitions. [2020-10-12 19:54:10,343 INFO L78 Accepts]: Start accepts. Automaton has 27529 states and 40273 transitions. Word has length 64 [2020-10-12 19:54:10,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:10,343 INFO L479 AbstractCegarLoop]: Abstraction has 27529 states and 40273 transitions. [2020-10-12 19:54:10,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:54:10,343 INFO L276 IsEmpty]: Start isEmpty. Operand 27529 states and 40273 transitions. [2020-10-12 19:54:10,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:54:10,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:10,346 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:10,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:54:10,347 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:10,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:10,347 INFO L82 PathProgramCache]: Analyzing trace with hash -914461616, now seen corresponding path program 1 times [2020-10-12 19:54:10,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:10,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229485382] [2020-10-12 19:54:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:10,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:10,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:10,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:10,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:10,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:10,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:10,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:11,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:11,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:11,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:15,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:15,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:15,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:54:15,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:54:15,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:54:15,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:15,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:54:15,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:54:15,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 19:54:15,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:15,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:15,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:15,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:15,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:15,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:15,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:54:15,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:15,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:54:15,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:15,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:54:15,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:15,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229485382] [2020-10-12 19:54:15,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:54:15,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:54:15,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005012026] [2020-10-12 19:54:15,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:54:15,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:15,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:54:15,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:54:15,656 INFO L87 Difference]: Start difference. First operand 27529 states and 40273 transitions. Second operand 12 states. [2020-10-12 19:54:38,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:38,960 INFO L93 Difference]: Finished difference Result 232832 states and 335350 transitions. [2020-10-12 19:54:38,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 19:54:38,961 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-12 19:54:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:39,529 INFO L225 Difference]: With dead ends: 232832 [2020-10-12 19:54:39,529 INFO L226 Difference]: Without dead ends: 205344 [2020-10-12 19:54:39,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 19:54:39,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205344 states. [2020-10-12 19:54:47,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205344 to 70066. [2020-10-12 19:54:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70066 states. [2020-10-12 19:54:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70066 states to 70066 states and 101395 transitions. [2020-10-12 19:54:47,629 INFO L78 Accepts]: Start accepts. Automaton has 70066 states and 101395 transitions. Word has length 65 [2020-10-12 19:54:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:47,629 INFO L479 AbstractCegarLoop]: Abstraction has 70066 states and 101395 transitions. [2020-10-12 19:54:47,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:54:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 70066 states and 101395 transitions. [2020-10-12 19:54:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:54:47,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:47,636 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:47,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:54:47,636 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:47,636 INFO L82 PathProgramCache]: Analyzing trace with hash 990764085, now seen corresponding path program 1 times [2020-10-12 19:54:47,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:47,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668758144] [2020-10-12 19:54:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:47,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:47,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:47,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:47,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:47,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:48,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:51,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:51,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:54:51,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:54:51,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4096 [2020-10-12 19:54:51,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:51,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:54:51,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:54:51,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:54:51,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:52,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:52,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:52,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:52,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:52,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:52,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:54:52,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:52,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:54:52,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:52,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:54:52,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:52,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668758144] [2020-10-12 19:54:52,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:54:52,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:54:52,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697877838] [2020-10-12 19:54:52,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:54:52,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:52,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:54:52,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:54:52,099 INFO L87 Difference]: Start difference. First operand 70066 states and 101395 transitions. Second operand 10 states. [2020-10-12 19:54:52,411 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 117 [2020-10-12 19:55:17,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:17,973 INFO L93 Difference]: Finished difference Result 226146 states and 321645 transitions. [2020-10-12 19:55:17,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:55:17,973 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-12 19:55:17,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:18,265 INFO L225 Difference]: With dead ends: 226146 [2020-10-12 19:55:18,266 INFO L226 Difference]: Without dead ends: 190384 [2020-10-12 19:55:18,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-10-12 19:55:18,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190384 states. [2020-10-12 19:55:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190384 to 83010. [2020-10-12 19:55:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83010 states. [2020-10-12 19:55:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83010 states to 83010 states and 119346 transitions. [2020-10-12 19:55:31,482 INFO L78 Accepts]: Start accepts. Automaton has 83010 states and 119346 transitions. Word has length 65 [2020-10-12 19:55:31,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:31,483 INFO L479 AbstractCegarLoop]: Abstraction has 83010 states and 119346 transitions. [2020-10-12 19:55:31,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:55:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 83010 states and 119346 transitions. [2020-10-12 19:55:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:55:31,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:31,489 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:31,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:55:31,489 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash -174509090, now seen corresponding path program 1 times [2020-10-12 19:55:31,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:31,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869724011] [2020-10-12 19:55:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:31,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:31,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:31,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:31,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:32,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:32,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:55:32,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:55:32,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-12 19:55:32,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:32,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:55:32,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:55:32,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:55:32,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:32,658 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2020-10-12 19:55:32,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:32,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:32,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:32,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:32,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:32,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:55:32,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:32,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:32,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869724011] [2020-10-12 19:55:32,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:55:32,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:55:32,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435155313] [2020-10-12 19:55:32,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:55:32,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:32,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:55:32,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:55:32,794 INFO L87 Difference]: Start difference. First operand 83010 states and 119346 transitions. Second operand 10 states. [2020-10-12 19:56:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:46,389 INFO L93 Difference]: Finished difference Result 555238 states and 798460 transitions. [2020-10-12 19:56:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:56:46,390 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-12 19:56:46,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:47,151 INFO L225 Difference]: With dead ends: 555238 [2020-10-12 19:56:47,152 INFO L226 Difference]: Without dead ends: 472280 [2020-10-12 19:56:47,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2020-10-12 19:56:47,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472280 states.