/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:40:48,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:40:48,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:40:48,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:40:48,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:40:48,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:40:48,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:40:48,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:40:48,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:40:48,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:40:48,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:40:48,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:40:48,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:40:48,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:40:48,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:40:48,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:40:48,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:40:48,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:40:48,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:40:48,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:40:48,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:40:48,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:40:48,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:40:48,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:40:48,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:40:48,980 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:40:48,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:40:48,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:40:48,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:40:48,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:40:48,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:40:48,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:40:48,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:40:48,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:40:48,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:40:48,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:40:48,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:40:48,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:40:48,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:40:48,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:40:48,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:40:48,989 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:40:49,023 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:40:49,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:40:49,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:40:49,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:40:49,026 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:40:49,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:40:49,027 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:40:49,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:40:49,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:40:49,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:40:49,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:40:49,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:40:49,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:40:49,029 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:40:49,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:40:49,029 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:40:49,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:40:49,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:40:49,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:40:49,032 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:40:49,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:40:49,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:40:49,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:40:49,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:40:49,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:40:49,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:40:49,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:40:49,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:40:49,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:40:49,034 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:40:49,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:40:49,336 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:40:49,339 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:40:49,341 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:40:49,341 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:40:49,342 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-13 14:40:49,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e9672c27/63c03b5734854d9a977e78636c03e8c6/FLAGcd0e6d46f [2020-10-13 14:40:49,922 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:40:49,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-13 14:40:49,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e9672c27/63c03b5734854d9a977e78636c03e8c6/FLAGcd0e6d46f [2020-10-13 14:40:50,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e9672c27/63c03b5734854d9a977e78636c03e8c6 [2020-10-13 14:40:50,274 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:40:50,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:40:50,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:40:50,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:40:50,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:40:50,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:40:50" (1/1) ... [2020-10-13 14:40:50,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e04f8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:50, skipping insertion in model container [2020-10-13 14:40:50,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:40:50" (1/1) ... [2020-10-13 14:40:50,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:40:50,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:40:50,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:40:50,612 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:40:50,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:40:50,814 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:40:50,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:50 WrapperNode [2020-10-13 14:40:50,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:40:50,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:40:50,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:40:50,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:40:50,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:50" (1/1) ... [2020-10-13 14:40:50,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:50" (1/1) ... [2020-10-13 14:40:50,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:50" (1/1) ... [2020-10-13 14:40:50,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:50" (1/1) ... [2020-10-13 14:40:50,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:50" (1/1) ... [2020-10-13 14:40:50,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:50" (1/1) ... [2020-10-13 14:40:50,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:50" (1/1) ... [2020-10-13 14:40:50,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:40:50,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:40:50,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:40:50,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:40:50,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:40:50,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:40:50,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:40:50,939 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:40:50,940 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:40:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:40:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:40:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:40:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:40:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:40:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:40:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:40:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:40:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:40:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:40:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:40:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:40:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:40:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:40:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:40:50,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:40:50,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:40:51,536 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:40:51,537 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:40:51,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:40:51 BoogieIcfgContainer [2020-10-13 14:40:51,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:40:51,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:40:51,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:40:51,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:40:51,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:40:50" (1/3) ... [2020-10-13 14:40:51,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ec05e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:40:51, skipping insertion in model container [2020-10-13 14:40:51,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:50" (2/3) ... [2020-10-13 14:40:51,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ec05e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:40:51, skipping insertion in model container [2020-10-13 14:40:51,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:40:51" (3/3) ... [2020-10-13 14:40:51,559 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-13 14:40:51,570 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:40:51,583 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:40:51,598 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:40:51,634 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:40:51,634 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:40:51,635 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:40:51,635 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:40:51,635 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:40:51,635 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:40:51,636 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:40:51,636 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:40:51,665 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states. [2020-10-13 14:40:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 14:40:51,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:51,682 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] [2020-10-13 14:40:51,682 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:51,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:51,691 INFO L82 PathProgramCache]: Analyzing trace with hash -569546062, now seen corresponding path program 1 times [2020-10-13 14:40:51,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:51,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640736583] [2020-10-13 14:40:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:52,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:52,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:52,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:52,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:53,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:55,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:55,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 14:40:55,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:40:55,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3804 [2020-10-13 14:40:55,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:55,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:55,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:40:55,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:40:55,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 14:40:56,008 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:40:56,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:56,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:56,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:56,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:56,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:56,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:40:56,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:56,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:56,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:56,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:56,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:40:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:40:56,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640736583] [2020-10-13 14:40:56,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:56,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:56,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446677245] [2020-10-13 14:40:56,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:56,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:56,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:56,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:56,075 INFO L87 Difference]: Start difference. First operand 110 states. Second operand 4 states. [2020-10-13 14:40:56,351 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-13 14:40:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:56,986 INFO L93 Difference]: Finished difference Result 252 states and 402 transitions. [2020-10-13 14:40:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:40:56,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-13 14:40:56,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:57,002 INFO L225 Difference]: With dead ends: 252 [2020-10-13 14:40:57,002 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 14:40:57,007 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 [2020-10-13 14:40:57,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 14:40:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2020-10-13 14:40:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-13 14:40:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 241 transitions. [2020-10-13 14:40:57,069 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 241 transitions. Word has length 52 [2020-10-13 14:40:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:57,070 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 241 transitions. [2020-10-13 14:40:57,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:57,071 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 241 transitions. [2020-10-13 14:40:57,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 14:40:57,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:57,073 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] [2020-10-13 14:40:57,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:40:57,074 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:57,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:57,074 INFO L82 PathProgramCache]: Analyzing trace with hash 175792448, now seen corresponding path program 1 times [2020-10-13 14:40:57,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:57,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060469611] [2020-10-13 14:40:57,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:57,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:57,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:57,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:57,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:58,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:58,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 14:40:58,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:40:58,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1211 [2020-10-13 14:40:58,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:58,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:58,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:40:58,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:40:58,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:40:58,531 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:40:58,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:58,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:58,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:58,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:58,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:58,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:40:58,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:58,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:58,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:58,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:58,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:40:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:40:58,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060469611] [2020-10-13 14:40:58,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:58,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:58,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645294004] [2020-10-13 14:40:58,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:58,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:58,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:58,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:58,567 INFO L87 Difference]: Start difference. First operand 163 states and 241 transitions. Second operand 4 states. [2020-10-13 14:40:58,740 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-13 14:40:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:59,225 INFO L93 Difference]: Finished difference Result 395 states and 609 transitions. [2020-10-13 14:40:59,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:40:59,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-13 14:40:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:59,229 INFO L225 Difference]: With dead ends: 395 [2020-10-13 14:40:59,229 INFO L226 Difference]: Without dead ends: 263 [2020-10-13 14:40:59,232 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 [2020-10-13 14:40:59,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-13 14:40:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 261. [2020-10-13 14:40:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-13 14:40:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 396 transitions. [2020-10-13 14:40:59,260 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 396 transitions. Word has length 53 [2020-10-13 14:40:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:59,261 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 396 transitions. [2020-10-13 14:40:59,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:59,261 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 396 transitions. [2020-10-13 14:40:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 14:40:59,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:59,263 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] [2020-10-13 14:40:59,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:40:59,264 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:59,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1135123643, now seen corresponding path program 1 times [2020-10-13 14:40:59,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:59,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723364994] [2020-10-13 14:40:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:59,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:59,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:59,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:59,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:59,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 14:40:59,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:40:59,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-13 14:40:59,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:59,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:59,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 14:40:59,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:40:59,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:00,177 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:41:00,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:00,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:00,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:00,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:00,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:00,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:41:00,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:00,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:00,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:00,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:00,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:41:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:00,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723364994] [2020-10-13 14:41:00,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:00,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:41:00,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616564410] [2020-10-13 14:41:00,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:41:00,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:00,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:41:00,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:41:00,217 INFO L87 Difference]: Start difference. First operand 261 states and 396 transitions. Second operand 4 states. [2020-10-13 14:41:00,371 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-13 14:41:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:00,912 INFO L93 Difference]: Finished difference Result 657 states and 1022 transitions. [2020-10-13 14:41:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:41:00,913 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-13 14:41:00,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:00,917 INFO L225 Difference]: With dead ends: 657 [2020-10-13 14:41:00,918 INFO L226 Difference]: Without dead ends: 427 [2020-10-13 14:41:00,920 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 [2020-10-13 14:41:00,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-13 14:41:00,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 425. [2020-10-13 14:41:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-13 14:41:00,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 652 transitions. [2020-10-13 14:41:00,956 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 652 transitions. Word has length 54 [2020-10-13 14:41:00,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:00,957 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 652 transitions. [2020-10-13 14:41:00,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:41:00,959 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 652 transitions. [2020-10-13 14:41:00,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:41:00,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:00,963 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] [2020-10-13 14:41:00,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:41:00,967 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:00,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:00,968 INFO L82 PathProgramCache]: Analyzing trace with hash 281846881, now seen corresponding path program 1 times [2020-10-13 14:41:00,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:00,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235027176] [2020-10-13 14:41:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:01,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:01,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:01,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:01,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:41:01,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:41:01,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 444 [2020-10-13 14:41:01,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:01,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:01,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:41:01,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:41:01,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:01,617 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:41:01,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:01,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:01,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:01,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:01,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:01,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:41:01,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:01,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:01,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:01,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:01,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:01,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235027176] [2020-10-13 14:41:01,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:01,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:41:01,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989414439] [2020-10-13 14:41:01,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:41:01,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:01,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:41:01,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:41:01,647 INFO L87 Difference]: Start difference. First operand 425 states and 652 transitions. Second operand 4 states. [2020-10-13 14:41:01,792 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-13 14:41:02,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:02,321 INFO L93 Difference]: Finished difference Result 1125 states and 1750 transitions. [2020-10-13 14:41:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:41:02,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-13 14:41:02,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:02,329 INFO L225 Difference]: With dead ends: 1125 [2020-10-13 14:41:02,330 INFO L226 Difference]: Without dead ends: 731 [2020-10-13 14:41:02,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:41:02,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-10-13 14:41:02,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 729. [2020-10-13 14:41:02,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2020-10-13 14:41:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1120 transitions. [2020-10-13 14:41:02,404 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1120 transitions. Word has length 55 [2020-10-13 14:41:02,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:02,405 INFO L479 AbstractCegarLoop]: Abstraction has 729 states and 1120 transitions. [2020-10-13 14:41:02,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:41:02,405 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1120 transitions. [2020-10-13 14:41:02,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:41:02,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:02,409 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] [2020-10-13 14:41:02,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:41:02,409 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:02,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:02,410 INFO L82 PathProgramCache]: Analyzing trace with hash 177280428, now seen corresponding path program 1 times [2020-10-13 14:41:02,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:02,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146001130] [2020-10-13 14:41:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:02,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:02,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:03,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:03,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:41:03,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:41:03,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-10-13 14:41:03,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:41:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:41:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 14:41:03,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:03,855 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:41:03,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:03,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:03,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:03,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:03,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:03,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:41:03,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:03,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:03,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:03,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:03,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:03,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146001130] [2020-10-13 14:41:03,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:03,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:41:03,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244507479] [2020-10-13 14:41:03,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:41:03,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:03,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:41:03,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:41:03,929 INFO L87 Difference]: Start difference. First operand 729 states and 1120 transitions. Second operand 7 states. [2020-10-13 14:41:05,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:05,232 INFO L93 Difference]: Finished difference Result 3113 states and 4804 transitions. [2020-10-13 14:41:05,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:41:05,233 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-13 14:41:05,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:05,247 INFO L225 Difference]: With dead ends: 3113 [2020-10-13 14:41:05,247 INFO L226 Difference]: Without dead ends: 2415 [2020-10-13 14:41:05,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:41:05,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2020-10-13 14:41:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2409. [2020-10-13 14:41:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2409 states. [2020-10-13 14:41:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 3696 transitions. [2020-10-13 14:41:05,426 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 3696 transitions. Word has length 55 [2020-10-13 14:41:05,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:05,428 INFO L479 AbstractCegarLoop]: Abstraction has 2409 states and 3696 transitions. [2020-10-13 14:41:05,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:41:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 3696 transitions. [2020-10-13 14:41:05,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:41:05,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:05,437 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] [2020-10-13 14:41:05,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:41:05,437 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:05,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1659835299, now seen corresponding path program 1 times [2020-10-13 14:41:05,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:05,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520979981] [2020-10-13 14:41:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:05,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:05,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:06,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:06,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:41:06,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:41:06,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 838 [2020-10-13 14:41:06,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:06,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:41:06,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:41:06,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 14:41:06,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 14:41:06,625 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:41:06,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:06,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:06,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:06,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:06,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:06,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:41:06,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:06,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:06,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:06,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:41:06,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:06,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520979981] [2020-10-13 14:41:06,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:06,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:41:06,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132291183] [2020-10-13 14:41:06,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:41:06,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:06,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:41:06,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:41:06,668 INFO L87 Difference]: Start difference. First operand 2409 states and 3696 transitions. Second operand 6 states. [2020-10-13 14:41:06,816 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:41:07,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:07,605 INFO L93 Difference]: Finished difference Result 7117 states and 10930 transitions. [2020-10-13 14:41:07,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:41:07,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-13 14:41:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:07,629 INFO L225 Difference]: With dead ends: 7117 [2020-10-13 14:41:07,630 INFO L226 Difference]: Without dead ends: 4739 [2020-10-13 14:41:07,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:41:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2020-10-13 14:41:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 4737. [2020-10-13 14:41:08,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4737 states. [2020-10-13 14:41:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4737 states to 4737 states and 7216 transitions. [2020-10-13 14:41:08,047 INFO L78 Accepts]: Start accepts. Automaton has 4737 states and 7216 transitions. Word has length 57 [2020-10-13 14:41:08,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:08,047 INFO L479 AbstractCegarLoop]: Abstraction has 4737 states and 7216 transitions. [2020-10-13 14:41:08,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:41:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4737 states and 7216 transitions. [2020-10-13 14:41:08,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:41:08,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:08,049 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] [2020-10-13 14:41:08,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:41:08,049 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:08,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:08,050 INFO L82 PathProgramCache]: Analyzing trace with hash -860288034, now seen corresponding path program 1 times [2020-10-13 14:41:08,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:08,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761819391] [2020-10-13 14:41:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:08,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:08,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:08,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:41:08,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:08,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-13 14:41:08,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:08,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:41:08,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:41:08,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 14:41:08,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:08,459 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:41:08,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:08,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:08,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:08,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:08,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:08,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:41:08,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:08,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:08,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761819391] [2020-10-13 14:41:08,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:08,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:41:08,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379878237] [2020-10-13 14:41:08,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:41:08,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:08,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:41:08,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:41:08,491 INFO L87 Difference]: Start difference. First operand 4737 states and 7216 transitions. Second operand 7 states. [2020-10-13 14:41:08,655 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 14:41:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:10,164 INFO L93 Difference]: Finished difference Result 21555 states and 32877 transitions. [2020-10-13 14:41:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 14:41:10,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-13 14:41:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:10,247 INFO L225 Difference]: With dead ends: 21555 [2020-10-13 14:41:10,247 INFO L226 Difference]: Without dead ends: 16849 [2020-10-13 14:41:10,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:41:10,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16849 states. [2020-10-13 14:41:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16849 to 9441. [2020-10-13 14:41:11,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9441 states. [2020-10-13 14:41:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9441 states to 9441 states and 14144 transitions. [2020-10-13 14:41:11,150 INFO L78 Accepts]: Start accepts. Automaton has 9441 states and 14144 transitions. Word has length 57 [2020-10-13 14:41:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:11,151 INFO L479 AbstractCegarLoop]: Abstraction has 9441 states and 14144 transitions. [2020-10-13 14:41:11,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:41:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 9441 states and 14144 transitions. [2020-10-13 14:41:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:41:11,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:11,153 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] [2020-10-13 14:41:11,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:41:11,153 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:11,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:11,154 INFO L82 PathProgramCache]: Analyzing trace with hash -917658031, now seen corresponding path program 1 times [2020-10-13 14:41:11,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:11,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819596105] [2020-10-13 14:41:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:11,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:11,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:11,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:41:11,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:11,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-13 14:41:11,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:11,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:41:11,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 14:41:11,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:41:11,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:11,554 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:41:11,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:11,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:11,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:11,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:11,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:11,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:41:11,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:11,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:11,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:11,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:11,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:11,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819596105] [2020-10-13 14:41:11,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:11,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:41:11,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069529821] [2020-10-13 14:41:11,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:41:11,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:11,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:41:11,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:41:11,589 INFO L87 Difference]: Start difference. First operand 9441 states and 14144 transitions. Second operand 5 states. [2020-10-13 14:41:13,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:13,720 INFO L93 Difference]: Finished difference Result 19363 states and 28769 transitions. [2020-10-13 14:41:13,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:41:13,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-13 14:41:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:13,777 INFO L225 Difference]: With dead ends: 19363 [2020-10-13 14:41:13,777 INFO L226 Difference]: Without dead ends: 19361 [2020-10-13 14:41:13,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:41:13,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19361 states. [2020-10-13 14:41:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19361 to 9953. [2020-10-13 14:41:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9953 states. [2020-10-13 14:41:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9953 states to 9953 states and 14656 transitions. [2020-10-13 14:41:14,786 INFO L78 Accepts]: Start accepts. Automaton has 9953 states and 14656 transitions. Word has length 58 [2020-10-13 14:41:14,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:14,787 INFO L479 AbstractCegarLoop]: Abstraction has 9953 states and 14656 transitions. [2020-10-13 14:41:14,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:41:14,787 INFO L276 IsEmpty]: Start isEmpty. Operand 9953 states and 14656 transitions. [2020-10-13 14:41:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:41:14,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:14,789 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] [2020-10-13 14:41:14,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:41:14,790 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:14,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:14,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1626991853, now seen corresponding path program 1 times [2020-10-13 14:41:14,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:14,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983091476] [2020-10-13 14:41:14,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:14,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:14,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:14,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:41:14,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:14,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-13 14:41:14,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:14,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:14,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:41:14,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 14:41:14,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:15,045 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:41:15,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:15,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:15,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:15,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:15,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:15,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:41:15,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:15,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:15,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:15,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:15,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:15,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983091476] [2020-10-13 14:41:15,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:15,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:41:15,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249445316] [2020-10-13 14:41:15,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:41:15,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:15,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:41:15,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:41:15,087 INFO L87 Difference]: Start difference. First operand 9953 states and 14656 transitions. Second operand 4 states. [2020-10-13 14:41:15,228 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-13 14:41:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:16,776 INFO L93 Difference]: Finished difference Result 24075 states and 35432 transitions. [2020-10-13 14:41:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:41:16,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-13 14:41:16,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:16,817 INFO L225 Difference]: With dead ends: 24075 [2020-10-13 14:41:16,818 INFO L226 Difference]: Without dead ends: 14153 [2020-10-13 14:41:16,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:41:16,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14153 states. [2020-10-13 14:41:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14153 to 14151. [2020-10-13 14:41:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14151 states. [2020-10-13 14:41:18,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 20694 transitions. [2020-10-13 14:41:18,288 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 20694 transitions. Word has length 59 [2020-10-13 14:41:18,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:18,289 INFO L479 AbstractCegarLoop]: Abstraction has 14151 states and 20694 transitions. [2020-10-13 14:41:18,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:41:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 20694 transitions. [2020-10-13 14:41:18,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:41:18,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:18,296 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:18,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:41:18,296 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:18,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:18,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1939919493, now seen corresponding path program 1 times [2020-10-13 14:41:18,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:18,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522588108] [2020-10-13 14:41:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:18,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:18,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:18,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:20,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:20,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:41:20,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:41:20,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2048 [2020-10-13 14:41:20,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:20,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:41:20,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:41:20,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 14:41:20,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:20,628 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-13 14:41:20,838 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:41:20,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:20,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:20,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:20,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:20,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:20,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-13 14:41:20,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:20,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:20,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:20,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:20,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:20,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522588108] [2020-10-13 14:41:20,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:41:20,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:41:20,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202879954] [2020-10-13 14:41:20,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:41:20,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:20,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:41:20,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:41:20,913 INFO L87 Difference]: Start difference. First operand 14151 states and 20694 transitions. Second operand 9 states. [2020-10-13 14:41:21,116 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-13 14:41:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:28,041 INFO L93 Difference]: Finished difference Result 76597 states and 110820 transitions. [2020-10-13 14:41:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:41:28,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 80 [2020-10-13 14:41:28,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:28,215 INFO L225 Difference]: With dead ends: 76597 [2020-10-13 14:41:28,216 INFO L226 Difference]: Without dead ends: 65339 [2020-10-13 14:41:28,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:41:28,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65339 states. [2020-10-13 14:41:30,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65339 to 23745. [2020-10-13 14:41:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23745 states. [2020-10-13 14:41:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23745 states to 23745 states and 34544 transitions. [2020-10-13 14:41:30,323 INFO L78 Accepts]: Start accepts. Automaton has 23745 states and 34544 transitions. Word has length 80 [2020-10-13 14:41:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:30,323 INFO L479 AbstractCegarLoop]: Abstraction has 23745 states and 34544 transitions. [2020-10-13 14:41:30,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:41:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 23745 states and 34544 transitions. [2020-10-13 14:41:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:41:30,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:30,335 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:30,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:41:30,335 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:30,336 INFO L82 PathProgramCache]: Analyzing trace with hash 456620942, now seen corresponding path program 1 times [2020-10-13 14:41:30,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:30,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186247628] [2020-10-13 14:41:30,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:30,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:30,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:30,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:30,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:41:30,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:41:30,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-13 14:41:30,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:30,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:41:30,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:41:30,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 14:41:30,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:30,964 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:41:30,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:30,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:30,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:30,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:30,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:30,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 14:41:30,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:30,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:30,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:30,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:41:30,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 14:41:31,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186247628] [2020-10-13 14:41:31,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:31,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:41:31,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044105627] [2020-10-13 14:41:31,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:41:31,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:31,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:41:31,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:41:31,022 INFO L87 Difference]: Start difference. First operand 23745 states and 34544 transitions. Second operand 6 states. [2020-10-13 14:41:31,191 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 14:41:35,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:35,255 INFO L93 Difference]: Finished difference Result 70773 states and 102774 transitions. [2020-10-13 14:41:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:41:35,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-13 14:41:35,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:35,345 INFO L225 Difference]: With dead ends: 70773 [2020-10-13 14:41:35,345 INFO L226 Difference]: Without dead ends: 47061 [2020-10-13 14:41:35,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:41:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47061 states. [2020-10-13 14:41:38,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47061 to 47059. [2020-10-13 14:41:38,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47059 states. [2020-10-13 14:41:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47059 states to 47059 states and 67866 transitions. [2020-10-13 14:41:39,004 INFO L78 Accepts]: Start accepts. Automaton has 47059 states and 67866 transitions. Word has length 80 [2020-10-13 14:41:39,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:39,004 INFO L479 AbstractCegarLoop]: Abstraction has 47059 states and 67866 transitions. [2020-10-13 14:41:39,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:41:39,004 INFO L276 IsEmpty]: Start isEmpty. Operand 47059 states and 67866 transitions. [2020-10-13 14:41:39,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:41:39,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:39,016 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:39,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:41:39,016 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:39,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:39,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2042100489, now seen corresponding path program 1 times [2020-10-13 14:41:39,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:39,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56159988] [2020-10-13 14:41:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:39,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:39,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:39,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:41,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:41,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:41:41,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:41:41,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2030 [2020-10-13 14:41:41,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:41,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:41:41,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:41:41,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 14:41:41,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:41,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:41,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:41,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:41,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:41,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:41,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:41:41,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:41,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:41,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:41,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:41,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:41:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:41,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56159988] [2020-10-13 14:41:41,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:41:41,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:41:41,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689777233] [2020-10-13 14:41:41,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:41:41,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:41,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:41:41,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:41:41,507 INFO L87 Difference]: Start difference. First operand 47059 states and 67866 transitions. Second operand 9 states. [2020-10-13 14:41:41,670 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-13 14:42:00,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:42:00,590 INFO L93 Difference]: Finished difference Result 208679 states and 297728 transitions. [2020-10-13 14:42:00,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:42:00,591 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 80 [2020-10-13 14:42:00,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:42:00,922 INFO L225 Difference]: With dead ends: 208679 [2020-10-13 14:42:00,922 INFO L226 Difference]: Without dead ends: 182109 [2020-10-13 14:42:00,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:42:01,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182109 states. [2020-10-13 14:42:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182109 to 76685. [2020-10-13 14:42:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76685 states. [2020-10-13 14:42:08,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76685 states to 76685 states and 110180 transitions. [2020-10-13 14:42:08,423 INFO L78 Accepts]: Start accepts. Automaton has 76685 states and 110180 transitions. Word has length 80 [2020-10-13 14:42:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:42:08,424 INFO L479 AbstractCegarLoop]: Abstraction has 76685 states and 110180 transitions. [2020-10-13 14:42:08,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:42:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 76685 states and 110180 transitions. [2020-10-13 14:42:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:42:08,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:42:08,436 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:42:08,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:42:08,436 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:42:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:42:08,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1905749307, now seen corresponding path program 1 times [2020-10-13 14:42:08,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:42:08,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702905528] [2020-10-13 14:42:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:42:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:08,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:08,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:08,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:09,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:09,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:42:09,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:42:09,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1416 [2020-10-13 14:42:09,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:09,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:42:09,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:42:09,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 14:42:09,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:10,044 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 24 [2020-10-13 14:42:10,244 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:42:10,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:42:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:10,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:10,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:10,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:42:10,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:42:10,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:42:10,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:10,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:42:10,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:42:10,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:42:10,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:42:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:42:10,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702905528] [2020-10-13 14:42:10,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:42:10,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:42:10,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85381872] [2020-10-13 14:42:10,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:42:10,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:42:10,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:42:10,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:42:10,301 INFO L87 Difference]: Start difference. First operand 76685 states and 110180 transitions. Second operand 9 states. [2020-10-13 14:42:10,551 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-13 14:42:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:42:48,560 INFO L93 Difference]: Finished difference Result 418159 states and 594442 transitions. [2020-10-13 14:42:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 14:42:48,560 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 80 [2020-10-13 14:42:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:42:49,190 INFO L225 Difference]: With dead ends: 418159 [2020-10-13 14:42:49,190 INFO L226 Difference]: Without dead ends: 341507 [2020-10-13 14:42:49,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2020-10-13 14:42:49,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341507 states. [2020-10-13 14:43:14,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341507 to 231135. [2020-10-13 14:43:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231135 states. [2020-10-13 14:43:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231135 states to 231135 states and 330242 transitions. [2020-10-13 14:43:15,122 INFO L78 Accepts]: Start accepts. Automaton has 231135 states and 330242 transitions. Word has length 80 [2020-10-13 14:43:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:43:15,122 INFO L479 AbstractCegarLoop]: Abstraction has 231135 states and 330242 transitions. [2020-10-13 14:43:15,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:43:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 231135 states and 330242 transitions. [2020-10-13 14:43:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:43:15,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:43:15,145 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:43:15,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:43:15,145 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:43:15,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:43:15,146 INFO L82 PathProgramCache]: Analyzing trace with hash 539104032, now seen corresponding path program 1 times [2020-10-13 14:43:15,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:43:15,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855676703] [2020-10-13 14:43:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:43:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:15,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:15,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:18,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:18,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:43:18,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:43:18,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3639 [2020-10-13 14:43:18,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:18,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:43:18,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:43:18,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 14:43:18,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:18,968 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:43:18,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:43:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:18,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:18,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:18,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:43:18,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:43:18,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:43:18,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:18,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:43:18,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:43:18,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:43:18,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 14:43:19,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855676703] [2020-10-13 14:43:19,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:43:19,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:43:19,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095685879] [2020-10-13 14:43:19,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:43:19,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:43:19,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:43:19,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:43:19,016 INFO L87 Difference]: Start difference. First operand 231135 states and 330242 transitions. Second operand 6 states. [2020-10-13 14:43:19,197 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 14:43:53,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:43:53,092 INFO L93 Difference]: Finished difference Result 526451 states and 753622 transitions. [2020-10-13 14:43:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:43:53,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-13 14:43:53,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:43:53,541 INFO L225 Difference]: With dead ends: 526451 [2020-10-13 14:43:53,541 INFO L226 Difference]: Without dead ends: 295349 [2020-10-13 14:43:53,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:43:53,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295349 states. [2020-10-13 14:44:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295349 to 232101. [2020-10-13 14:44:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232101 states. [2020-10-13 14:44:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232101 states to 232101 states and 331208 transitions. [2020-10-13 14:44:18,593 INFO L78 Accepts]: Start accepts. Automaton has 232101 states and 331208 transitions. Word has length 80 [2020-10-13 14:44:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:44:18,593 INFO L479 AbstractCegarLoop]: Abstraction has 232101 states and 331208 transitions. [2020-10-13 14:44:18,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:44:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 232101 states and 331208 transitions. [2020-10-13 14:44:18,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:44:18,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:44:18,604 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:44:18,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:44:18,604 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:44:18,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:44:18,605 INFO L82 PathProgramCache]: Analyzing trace with hash -813606075, now seen corresponding path program 1 times [2020-10-13 14:44:18,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:44:18,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994140585] [2020-10-13 14:44:18,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:44:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:44:18,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:18,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:18,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:20,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:44:20,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:44:20,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:44:20,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1788 [2020-10-13 14:44:20,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:44:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:44:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:44:20,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 14:44:20,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:44:20,707 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:44:20,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:44:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:44:20,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:20,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:44:20,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:44:20,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:44:20,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:44:20,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:44:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:44:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:44:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:44:20,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:44:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:44:20,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994140585] [2020-10-13 14:44:20,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:44:20,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:44:20,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315217987] [2020-10-13 14:44:20,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:44:20,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:44:20,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:44:20,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:44:20,740 INFO L87 Difference]: Start difference. First operand 232101 states and 331208 transitions. Second operand 9 states. [2020-10-13 14:44:20,924 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 133