/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_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:16:26,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:16:26,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:16:26,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:16:26,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:16:26,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:16:26,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:16:26,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:16:26,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:16:26,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:16:26,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:16:26,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:16:26,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:16:26,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:16:26,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:16:26,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:16:26,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:16:26,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:16:26,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:16:26,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:16:26,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:16:26,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:16:26,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:16:26,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:16:26,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:16:26,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:16:26,975 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:16:26,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:16:26,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:16:26,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:16:26,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:16:26,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:16:26,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:16:26,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:16:26,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:16:26,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:16:26,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:16:26,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:16:26,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:16:26,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:16:26,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:16:26,993 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 20:16:27,027 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:16:27,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:16:27,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:16:27,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:16:27,030 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:16:27,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:16:27,030 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:16:27,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:16:27,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:16:27,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:16:27,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:16:27,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:16:27,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:16:27,033 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:16:27,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:16:27,034 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:16:27,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:16:27,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:16:27,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:16:27,034 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:16:27,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:16:27,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:16:27,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:16:27,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:16:27,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:16:27,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:16:27,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:16:27,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:16:27,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:16:27,036 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 20:16:27,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:16:27,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:16:27,358 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:16:27,359 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:16:27,360 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:16:27,360 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:16:27,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30ce27139/9e6ba95a9faa47a1bb53b2e2dc8e293d/FLAG735c23aed [2020-10-12 20:16:27,913 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:16:27,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:16:27,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30ce27139/9e6ba95a9faa47a1bb53b2e2dc8e293d/FLAG735c23aed [2020-10-12 20:16:28,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30ce27139/9e6ba95a9faa47a1bb53b2e2dc8e293d [2020-10-12 20:16:28,247 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:16:28,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:16:28,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:16:28,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:16:28,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:16:28,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:16:28" (1/1) ... [2020-10-12 20:16:28,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46e2c402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:16:28, skipping insertion in model container [2020-10-12 20:16:28,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:16:28" (1/1) ... [2020-10-12 20:16:28,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:16:28,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:16:28,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:16:28,670 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:16:28,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:16:28,794 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:16:28,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:16:28 WrapperNode [2020-10-12 20:16:28,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:16:28,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:16:28,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:16:28,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:16:28,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:16:28" (1/1) ... [2020-10-12 20:16:28,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:16:28" (1/1) ... [2020-10-12 20:16:28,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:16:28" (1/1) ... [2020-10-12 20:16:28,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:16:28" (1/1) ... [2020-10-12 20:16:28,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:16:28" (1/1) ... [2020-10-12 20:16:28,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:16:28" (1/1) ... [2020-10-12 20:16:28,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:16:28" (1/1) ... [2020-10-12 20:16:28,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:16:28,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:16:28,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:16:28,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:16:28,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:16:28" (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 20:16:28,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:16:28,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:16:28,932 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:16:28,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:16:28,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:16:28,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:16:28,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 20:16:28,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:16:28,932 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:16:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:16:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:16:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:16:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:16:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:16:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:16:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:16:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:16:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:16:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:16:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:16:28,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:16:29,691 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:16:29,692 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:16:29,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:16:29 BoogieIcfgContainer [2020-10-12 20:16:29,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:16:29,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:16:29,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:16:29,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:16:29,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:16:28" (1/3) ... [2020-10-12 20:16:29,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2193c676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:16:29, skipping insertion in model container [2020-10-12 20:16:29,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:16:28" (2/3) ... [2020-10-12 20:16:29,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2193c676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:16:29, skipping insertion in model container [2020-10-12 20:16:29,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:16:29" (3/3) ... [2020-10-12 20:16:29,707 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:16:29,718 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:16:29,726 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:16:29,740 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:16:29,766 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:16:29,767 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:16:29,767 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:16:29,767 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:16:29,768 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:16:29,768 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:16:29,768 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:16:29,768 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:16:29,797 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-10-12 20:16:29,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 20:16:29,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:29,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:29,820 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:29,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1725986399, now seen corresponding path program 1 times [2020-10-12 20:16:29,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:29,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268114088] [2020-10-12 20:16:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:30,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:30,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:30,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:31,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:32,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:32,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 20:16:32,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:16:32,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2432 [2020-10-12 20:16:32,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:32,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:16:32,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:16:32,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 20:16:32,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 20:16:32,952 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:16:32,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:32,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:32,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:32,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:32,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:32,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:16:32,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:32,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:32,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:32,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:32,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:16:32,999 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 20:16:33,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268114088] [2020-10-12 20:16:33,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:33,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:16:33,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766645563] [2020-10-12 20:16:33,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:16:33,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:33,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:16:33,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:16:33,025 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 6 states. [2020-10-12 20:16:33,281 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 20:16:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:34,208 INFO L93 Difference]: Finished difference Result 746 states and 1238 transitions. [2020-10-12 20:16:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:16:34,211 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-12 20:16:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:34,231 INFO L225 Difference]: With dead ends: 746 [2020-10-12 20:16:34,232 INFO L226 Difference]: Without dead ends: 631 [2020-10-12 20:16:34,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:16:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-10-12 20:16:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 249. [2020-10-12 20:16:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-12 20:16:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 392 transitions. [2020-10-12 20:16:34,316 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 392 transitions. Word has length 66 [2020-10-12 20:16:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:34,316 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 392 transitions. [2020-10-12 20:16:34,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:16:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 392 transitions. [2020-10-12 20:16:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 20:16:34,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:34,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:34,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:16:34,321 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:34,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1904360380, now seen corresponding path program 1 times [2020-10-12 20:16:34,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:34,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208063851] [2020-10-12 20:16:34,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:34,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:34,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:34,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:34,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:35,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:37,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:37,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 20:16:37,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:16:37,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2664 [2020-10-12 20:16:37,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:37,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:16:37,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:16:37,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 20:16:37,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:37,328 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:16:37,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:37,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:37,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:37,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:37,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:37,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 20:16:37,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:37,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:37,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:37,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:37,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:16:37,396 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 20:16:37,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208063851] [2020-10-12 20:16:37,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:37,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:16:37,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727400298] [2020-10-12 20:16:37,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:16:37,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:37,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:16:37,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:16:37,404 INFO L87 Difference]: Start difference. First operand 249 states and 392 transitions. Second operand 7 states. [2020-10-12 20:16:37,701 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:16:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:39,062 INFO L93 Difference]: Finished difference Result 1585 states and 2595 transitions. [2020-10-12 20:16:39,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:16:39,062 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 20:16:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:39,071 INFO L225 Difference]: With dead ends: 1585 [2020-10-12 20:16:39,071 INFO L226 Difference]: Without dead ends: 1397 [2020-10-12 20:16:39,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:16:39,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2020-10-12 20:16:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 742. [2020-10-12 20:16:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2020-10-12 20:16:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1205 transitions. [2020-10-12 20:16:39,158 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1205 transitions. Word has length 67 [2020-10-12 20:16:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:39,160 INFO L479 AbstractCegarLoop]: Abstraction has 742 states and 1205 transitions. [2020-10-12 20:16:39,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:16:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1205 transitions. [2020-10-12 20:16:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 20:16:39,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:39,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:39,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:16:39,166 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:39,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:39,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1151422778, now seen corresponding path program 1 times [2020-10-12 20:16:39,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:39,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694846665] [2020-10-12 20:16:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:39,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:39,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:39,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:39,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:39,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:41,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:41,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 20:16:41,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:16:41,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2563 [2020-10-12 20:16:41,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:41,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:16:41,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:16:41,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 20:16:41,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:41,970 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:16:41,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:41,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:41,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:41,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:41,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:41,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:16:41,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:41,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:41,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:41,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:41,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:42,005 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 20:16:42,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694846665] [2020-10-12 20:16:42,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:42,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:16:42,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788673496] [2020-10-12 20:16:42,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:16:42,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:42,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:16:42,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:16:42,008 INFO L87 Difference]: Start difference. First operand 742 states and 1205 transitions. Second operand 7 states. [2020-10-12 20:16:42,218 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:16:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:43,885 INFO L93 Difference]: Finished difference Result 4590 states and 7534 transitions. [2020-10-12 20:16:43,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:16:43,886 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-12 20:16:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:43,910 INFO L225 Difference]: With dead ends: 4590 [2020-10-12 20:16:43,910 INFO L226 Difference]: Without dead ends: 3971 [2020-10-12 20:16:43,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:16:43,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2020-10-12 20:16:44,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2148. [2020-10-12 20:16:44,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2148 states. [2020-10-12 20:16:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2148 states to 2148 states and 3510 transitions. [2020-10-12 20:16:44,104 INFO L78 Accepts]: Start accepts. Automaton has 2148 states and 3510 transitions. Word has length 68 [2020-10-12 20:16:44,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:44,105 INFO L479 AbstractCegarLoop]: Abstraction has 2148 states and 3510 transitions. [2020-10-12 20:16:44,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:16:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2148 states and 3510 transitions. [2020-10-12 20:16:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 20:16:44,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:44,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:44,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:16:44,107 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1386862141, now seen corresponding path program 1 times [2020-10-12 20:16:44,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:44,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390376858] [2020-10-12 20:16:44,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:44,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:44,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:44,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:44,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:44,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:46,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:46,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 20:16:46,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:16:46,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1953 [2020-10-12 20:16:46,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:46,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:16:46,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:16:46,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:16:46,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:16:46,312 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:16:46,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:46,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:46,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:46,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:46,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:46,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:16:46,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:46,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:16:46,348 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 20:16:46,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390376858] [2020-10-12 20:16:46,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:46,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:16:46,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431829088] [2020-10-12 20:16:46,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:16:46,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:46,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:16:46,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:16:46,351 INFO L87 Difference]: Start difference. First operand 2148 states and 3510 transitions. Second operand 7 states. [2020-10-12 20:16:46,557 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:16:48,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:48,382 INFO L93 Difference]: Finished difference Result 13085 states and 21433 transitions. [2020-10-12 20:16:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:16:48,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 20:16:48,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:48,462 INFO L225 Difference]: With dead ends: 13085 [2020-10-12 20:16:48,462 INFO L226 Difference]: Without dead ends: 11110 [2020-10-12 20:16:48,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:16:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11110 states. [2020-10-12 20:16:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11110 to 6019. [2020-10-12 20:16:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6019 states. [2020-10-12 20:16:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6019 states to 6019 states and 9830 transitions. [2020-10-12 20:16:49,131 INFO L78 Accepts]: Start accepts. Automaton has 6019 states and 9830 transitions. Word has length 69 [2020-10-12 20:16:49,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:49,132 INFO L479 AbstractCegarLoop]: Abstraction has 6019 states and 9830 transitions. [2020-10-12 20:16:49,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:16:49,132 INFO L276 IsEmpty]: Start isEmpty. Operand 6019 states and 9830 transitions. [2020-10-12 20:16:49,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:16:49,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:49,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:49,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:16:49,134 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:49,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:49,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1470676787, now seen corresponding path program 1 times [2020-10-12 20:16:49,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:49,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565475117] [2020-10-12 20:16:49,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:49,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:49,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:49,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:49,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:49,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:50,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:50,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:16:50,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:16:50,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1331 [2020-10-12 20:16:50,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:50,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:16:50,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:16:50,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 20:16:50,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:50,767 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:16:50,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:50,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:50,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:50,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:50,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:50,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:16:50,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:50,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:50,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:50,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:50,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:50,807 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 20:16:50,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565475117] [2020-10-12 20:16:50,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:50,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:16:50,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574535449] [2020-10-12 20:16:50,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:16:50,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:50,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:16:50,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:16:50,810 INFO L87 Difference]: Start difference. First operand 6019 states and 9830 transitions. Second operand 6 states. [2020-10-12 20:16:51,040 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:16:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:52,710 INFO L93 Difference]: Finished difference Result 22181 states and 36265 transitions. [2020-10-12 20:16:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:16:52,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 20:16:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:52,771 INFO L225 Difference]: With dead ends: 22181 [2020-10-12 20:16:52,771 INFO L226 Difference]: Without dead ends: 16336 [2020-10-12 20:16:52,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:16:52,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16336 states. [2020-10-12 20:16:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16336 to 6019. [2020-10-12 20:16:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6019 states. [2020-10-12 20:16:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6019 states to 6019 states and 9822 transitions. [2020-10-12 20:16:53,285 INFO L78 Accepts]: Start accepts. Automaton has 6019 states and 9822 transitions. Word has length 71 [2020-10-12 20:16:53,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:53,285 INFO L479 AbstractCegarLoop]: Abstraction has 6019 states and 9822 transitions. [2020-10-12 20:16:53,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:16:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 6019 states and 9822 transitions. [2020-10-12 20:16:53,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:16:53,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:53,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:53,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:16:53,288 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:53,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:53,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1117229556, now seen corresponding path program 1 times [2020-10-12 20:16:53,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:53,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031875012] [2020-10-12 20:16:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:53,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:53,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:53,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:53,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:53,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:53,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:54,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:58,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:58,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:16:58,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:16:58,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 20:16:58,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:58,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:16:58,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-12 20:16:58,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 20:16:58,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:58,541 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:16:58,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:58,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:58,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:58,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:58,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:58,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:16:58,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:58,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:58,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:58,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:58,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:58,569 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 20:16:58,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031875012] [2020-10-12 20:16:58,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:58,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:16:58,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763166328] [2020-10-12 20:16:58,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:16:58,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:58,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:16:58,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:16:58,573 INFO L87 Difference]: Start difference. First operand 6019 states and 9822 transitions. Second operand 5 states. [2020-10-12 20:17:00,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:00,142 INFO L93 Difference]: Finished difference Result 16797 states and 27342 transitions. [2020-10-12 20:17:00,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:17:00,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-12 20:17:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:00,171 INFO L225 Difference]: With dead ends: 16797 [2020-10-12 20:17:00,172 INFO L226 Difference]: Without dead ends: 10913 [2020-10-12 20:17:00,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:17:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10913 states. [2020-10-12 20:17:00,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10913 to 10779. [2020-10-12 20:17:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10779 states. [2020-10-12 20:17:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 17356 transitions. [2020-10-12 20:17:00,844 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 17356 transitions. Word has length 72 [2020-10-12 20:17:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:00,845 INFO L479 AbstractCegarLoop]: Abstraction has 10779 states and 17356 transitions. [2020-10-12 20:17:00,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:17:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 17356 transitions. [2020-10-12 20:17:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:17:00,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:00,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:17:00,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:17:00,847 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:00,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:00,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1781712306, now seen corresponding path program 1 times [2020-10-12 20:17:00,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:00,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235873632] [2020-10-12 20:17:00,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:00,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:00,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:00,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:01,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:01,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:02,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:04,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:04,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:05,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:05,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:17:05,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:17:05,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 20:17:05,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:05,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:17:05,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:17:05,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 20:17:05,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:06,152 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:17:06,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:06,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:06,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:06,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:06,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:06,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:17:06,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:06,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:06,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:06,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:06,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:17:06,198 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 20:17:06,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235873632] [2020-10-12 20:17:06,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:06,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:17:06,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835769230] [2020-10-12 20:17:06,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:17:06,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:06,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:17:06,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:17:06,201 INFO L87 Difference]: Start difference. First operand 10779 states and 17356 transitions. Second operand 6 states. [2020-10-12 20:17:06,496 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:17:09,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:09,273 INFO L93 Difference]: Finished difference Result 42333 states and 68186 transitions. [2020-10-12 20:17:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:17:09,273 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-12 20:17:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:09,352 INFO L225 Difference]: With dead ends: 42333 [2020-10-12 20:17:09,352 INFO L226 Difference]: Without dead ends: 31785 [2020-10-12 20:17:09,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:17:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31785 states. [2020-10-12 20:17:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31785 to 20711. [2020-10-12 20:17:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20711 states. [2020-10-12 20:17:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20711 states to 20711 states and 33259 transitions. [2020-10-12 20:17:11,523 INFO L78 Accepts]: Start accepts. Automaton has 20711 states and 33259 transitions. Word has length 72 [2020-10-12 20:17:11,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:11,523 INFO L479 AbstractCegarLoop]: Abstraction has 20711 states and 33259 transitions. [2020-10-12 20:17:11,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:17:11,523 INFO L276 IsEmpty]: Start isEmpty. Operand 20711 states and 33259 transitions. [2020-10-12 20:17:11,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:17:11,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:11,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:17:11,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:17:11,526 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:11,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:11,526 INFO L82 PathProgramCache]: Analyzing trace with hash -298977637, now seen corresponding path program 1 times [2020-10-12 20:17:11,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:11,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112415084] [2020-10-12 20:17:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:11,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:11,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:11,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:11,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:11,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:11,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:11,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:14,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:16,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:16,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:17:16,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:17:16,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 20:17:16,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:16,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:17:16,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:17:16,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 20:17:16,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:16,772 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:17:16,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:16,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:16,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:16,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:16,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:16,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:17:16,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:16,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:16,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:16,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:16,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:16,803 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 20:17:16,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112415084] [2020-10-12 20:17:16,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:16,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:17:16,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80024589] [2020-10-12 20:17:16,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:17:16,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:16,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:17:16,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:17:16,812 INFO L87 Difference]: Start difference. First operand 20711 states and 33259 transitions. Second operand 6 states. [2020-10-12 20:17:17,027 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:17:19,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:19,452 INFO L93 Difference]: Finished difference Result 56469 states and 90645 transitions. [2020-10-12 20:17:19,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:17:19,453 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-12 20:17:19,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:19,560 INFO L225 Difference]: With dead ends: 56469 [2020-10-12 20:17:19,560 INFO L226 Difference]: Without dead ends: 44554 [2020-10-12 20:17:19,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:17:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44554 states. [2020-10-12 20:17:21,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44554 to 33335. [2020-10-12 20:17:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33335 states. [2020-10-12 20:17:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33335 states to 33335 states and 53483 transitions. [2020-10-12 20:17:21,839 INFO L78 Accepts]: Start accepts. Automaton has 33335 states and 53483 transitions. Word has length 72 [2020-10-12 20:17:21,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:21,839 INFO L479 AbstractCegarLoop]: Abstraction has 33335 states and 53483 transitions. [2020-10-12 20:17:21,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:17:21,839 INFO L276 IsEmpty]: Start isEmpty. Operand 33335 states and 53483 transitions. [2020-10-12 20:17:21,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:17:21,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:21,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:17:21,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:17:21,841 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:21,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:21,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1399973400, now seen corresponding path program 1 times [2020-10-12 20:17:21,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:21,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20980688] [2020-10-12 20:17:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:21,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:21,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:21,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:22,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:22,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:22,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:22,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:17:22,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:17:22,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 568 [2020-10-12 20:17:22,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:17:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 20:17:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 20:17:22,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:22,616 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:17:22,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:22,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:22,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:22,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:22,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:22,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:17:22,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:22,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:22,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:22,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:22,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:22,648 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 20:17:22,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20980688] [2020-10-12 20:17:22,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:22,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:17:22,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952334359] [2020-10-12 20:17:22,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:17:22,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:22,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:17:22,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:17:22,650 INFO L87 Difference]: Start difference. First operand 33335 states and 53483 transitions. Second operand 4 states. [2020-10-12 20:17:22,846 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-12 20:17:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:25,288 INFO L93 Difference]: Finished difference Result 72371 states and 116186 transitions. [2020-10-12 20:17:25,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:17:25,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-12 20:17:25,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:25,360 INFO L225 Difference]: With dead ends: 72371 [2020-10-12 20:17:25,361 INFO L226 Difference]: Without dead ends: 39160 [2020-10-12 20:17:25,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:17:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39160 states. [2020-10-12 20:17:28,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39160 to 39084. [2020-10-12 20:17:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39084 states. [2020-10-12 20:17:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39084 states to 39084 states and 62601 transitions. [2020-10-12 20:17:28,661 INFO L78 Accepts]: Start accepts. Automaton has 39084 states and 62601 transitions. Word has length 72 [2020-10-12 20:17:28,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:28,661 INFO L479 AbstractCegarLoop]: Abstraction has 39084 states and 62601 transitions. [2020-10-12 20:17:28,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:17:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 39084 states and 62601 transitions. [2020-10-12 20:17:28,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 20:17:28,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:28,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:17:28,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:17:28,663 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:28,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1034303660, now seen corresponding path program 1 times [2020-10-12 20:17:28,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:28,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957854878] [2020-10-12 20:17:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:28,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:28,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:28,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:28,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:28,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:29,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:31,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:33,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:33,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 20:17:33,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:17:33,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 20:17:33,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:33,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:17:33,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:17:33,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 20:17:33,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:33,914 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:17:33,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:33,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:33,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:33,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:33,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:33,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:17:33,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:33,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:33,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:33,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:33,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:33,945 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 20:17:33,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957854878] [2020-10-12 20:17:33,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:33,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:17:33,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094134454] [2020-10-12 20:17:33,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:17:33,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:33,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:17:33,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:17:33,948 INFO L87 Difference]: Start difference. First operand 39084 states and 62601 transitions. Second operand 5 states. [2020-10-12 20:17:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:38,256 INFO L93 Difference]: Finished difference Result 114281 states and 182884 transitions. [2020-10-12 20:17:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:17:38,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-12 20:17:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:38,394 INFO L225 Difference]: With dead ends: 114281 [2020-10-12 20:17:38,394 INFO L226 Difference]: Without dead ends: 75218 [2020-10-12 20:17:38,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 20:17:38,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75218 states. [2020-10-12 20:17:42,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75218 to 75216. [2020-10-12 20:17:42,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75216 states. [2020-10-12 20:17:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75216 states to 75216 states and 119393 transitions. [2020-10-12 20:17:42,705 INFO L78 Accepts]: Start accepts. Automaton has 75216 states and 119393 transitions. Word has length 73 [2020-10-12 20:17:42,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:42,705 INFO L479 AbstractCegarLoop]: Abstraction has 75216 states and 119393 transitions. [2020-10-12 20:17:42,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:17:42,705 INFO L276 IsEmpty]: Start isEmpty. Operand 75216 states and 119393 transitions. [2020-10-12 20:17:42,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:17:42,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:42,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:17:42,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:17:42,709 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:42,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:42,709 INFO L82 PathProgramCache]: Analyzing trace with hash 642889136, now seen corresponding path program 1 times [2020-10-12 20:17:42,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:42,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641118388] [2020-10-12 20:17:42,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:42,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:42,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:44,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:44,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:44,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:44,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:45,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:47,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:47,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:17:47,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:17:47,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 20:17:47,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:47,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:17:47,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:17:47,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 20:17:47,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:47,957 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:17:47,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:47,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:47,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:47,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:47,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:47,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 20:17:47,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:47,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:17:47,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:47,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:17:47,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:47,996 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 20:17:47,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641118388] [2020-10-12 20:17:47,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:47,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:17:47,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048392501] [2020-10-12 20:17:47,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:17:47,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:47,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:17:47,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:17:47,999 INFO L87 Difference]: Start difference. First operand 75216 states and 119393 transitions. Second operand 8 states. [2020-10-12 20:17:48,205 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 20:18:02,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:02,931 INFO L93 Difference]: Finished difference Result 278749 states and 443853 transitions. [2020-10-12 20:18:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:18:02,932 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 74 [2020-10-12 20:18:02,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:03,320 INFO L225 Difference]: With dead ends: 278749 [2020-10-12 20:18:03,320 INFO L226 Difference]: Without dead ends: 217803 [2020-10-12 20:18:03,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 20:18:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217803 states. [2020-10-12 20:18:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217803 to 149931. [2020-10-12 20:18:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149931 states. [2020-10-12 20:18:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149931 states to 149931 states and 237885 transitions. [2020-10-12 20:18:15,809 INFO L78 Accepts]: Start accepts. Automaton has 149931 states and 237885 transitions. Word has length 74 [2020-10-12 20:18:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:15,809 INFO L479 AbstractCegarLoop]: Abstraction has 149931 states and 237885 transitions. [2020-10-12 20:18:15,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:18:15,809 INFO L276 IsEmpty]: Start isEmpty. Operand 149931 states and 237885 transitions. [2020-10-12 20:18:15,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:18:15,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:15,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:18:15,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:18:15,812 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:15,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1538569030, now seen corresponding path program 1 times [2020-10-12 20:18:15,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:15,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855568979] [2020-10-12 20:18:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:15,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:15,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:15,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:15,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:16,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:16,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:19,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:19,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:18:19,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:18:19,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3361 [2020-10-12 20:18:19,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:19,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:18:19,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 20:18:19,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 20:18:19,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:19,397 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:18:19,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:19,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:19,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:19,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:19,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:19,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:18:19,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:19,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:19,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:19,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:19,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:19,418 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 20:18:19,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855568979] [2020-10-12 20:18:19,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:19,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:18:19,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609410083] [2020-10-12 20:18:19,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:18:19,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:19,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:18:19,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:18:19,420 INFO L87 Difference]: Start difference. First operand 149931 states and 237885 transitions. Second operand 5 states. [2020-10-12 20:18:19,635 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 20:18:33,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:33,319 INFO L93 Difference]: Finished difference Result 301805 states and 479404 transitions. [2020-10-12 20:18:33,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:18:33,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-12 20:18:33,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:33,576 INFO L225 Difference]: With dead ends: 301805 [2020-10-12 20:18:33,576 INFO L226 Difference]: Without dead ends: 174666 [2020-10-12 20:18:33,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:18:33,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174666 states. [2020-10-12 20:18:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174666 to 174366. [2020-10-12 20:18:44,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174366 states. [2020-10-12 20:18:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174366 states to 174366 states and 276065 transitions. [2020-10-12 20:18:44,966 INFO L78 Accepts]: Start accepts. Automaton has 174366 states and 276065 transitions. Word has length 74 [2020-10-12 20:18:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:44,966 INFO L479 AbstractCegarLoop]: Abstraction has 174366 states and 276065 transitions. [2020-10-12 20:18:44,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:18:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 174366 states and 276065 transitions. [2020-10-12 20:18:44,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:18:44,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:44,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:18:44,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:18:44,969 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:44,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:44,969 INFO L82 PathProgramCache]: Analyzing trace with hash -908075202, now seen corresponding path program 1 times [2020-10-12 20:18:44,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:44,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976353463] [2020-10-12 20:18:44,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:44,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:45,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:45,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:45,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:45,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:45,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:48,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:48,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:49,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:49,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:18:49,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:18:49,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 20:18:49,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:49,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:18:49,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:18:49,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 20:18:49,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:50,179 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:18:50,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:50,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:50,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:50,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:50,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:50,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:18:50,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:50,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:50,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:50,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:50,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:50,199 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 20:18:50,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976353463] [2020-10-12 20:18:50,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:50,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:18:50,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464838858] [2020-10-12 20:18:50,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:18:50,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:50,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:18:50,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:18:50,201 INFO L87 Difference]: Start difference. First operand 174366 states and 276065 transitions. Second operand 6 states. [2020-10-12 20:18:50,408 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:19:07,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:19:07,142 INFO L93 Difference]: Finished difference Result 337730 states and 534854 transitions. [2020-10-12 20:19:07,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:19:07,143 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-12 20:19:07,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:19:07,507 INFO L225 Difference]: With dead ends: 337730 [2020-10-12 20:19:07,508 INFO L226 Difference]: Without dead ends: 262082 [2020-10-12 20:19:07,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:19:07,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262082 states. [2020-10-12 20:19:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262082 to 215950. [2020-10-12 20:19:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215950 states. [2020-10-12 20:19:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215950 states to 215950 states and 341909 transitions. [2020-10-12 20:19:27,255 INFO L78 Accepts]: Start accepts. Automaton has 215950 states and 341909 transitions. Word has length 74 [2020-10-12 20:19:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:19:27,255 INFO L479 AbstractCegarLoop]: Abstraction has 215950 states and 341909 transitions. [2020-10-12 20:19:27,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:19:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 215950 states and 341909 transitions. [2020-10-12 20:19:27,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 20:19:27,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:19:27,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:19:27,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:19:27,258 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:19:27,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:19:27,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1447178369, now seen corresponding path program 1 times [2020-10-12 20:19:27,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:19:27,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784142753] [2020-10-12 20:19:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:19:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:27,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:27,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:27,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:27,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:27,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:27,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:27,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:27,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:30,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:30,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:32,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:32,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 20:19:32,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 20:19:32,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-12 20:19:32,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:32,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:19:32,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:19:32,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 20:19:32,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:32,487 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:19:32,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:19:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:32,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:32,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:32,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:19:32,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:19:32,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:19:32,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:32,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:19:32,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:19:32,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:19:32,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:32,508 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 20:19:32,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784142753] [2020-10-12 20:19:32,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:19:32,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:19:32,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367715011] [2020-10-12 20:19:32,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:19:32,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:19:32,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:19:32,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:19:32,510 INFO L87 Difference]: Start difference. First operand 215950 states and 341909 transitions. Second operand 7 states. [2020-10-12 20:19:32,717 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 20:19:58,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:19:58,500 INFO L93 Difference]: Finished difference Result 447600 states and 708509 transitions. [2020-10-12 20:19:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:19:58,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-10-12 20:19:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted.