/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:53:43,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:53:43,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:53:43,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:53:43,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:53:43,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:53:43,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:53:43,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:53:43,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:53:43,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:53:43,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:53:43,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:53:43,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:53:43,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:53:43,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:53:43,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:53:43,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:53:43,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:53:43,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:53:43,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:53:43,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:53:43,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:53:43,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:53:43,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:53:44,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:53:44,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:53:44,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:53:44,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:53:44,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:53:44,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:53:44,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:53:44,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:53:44,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:53:44,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:53:44,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:53:44,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:53:44,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:53:44,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:53:44,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:53:44,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:53:44,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:53:44,023 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 19:53:44,067 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:53:44,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:53:44,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:53:44,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:53:44,071 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:53:44,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:53:44,072 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:53:44,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:53:44,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:53:44,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:53:44,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:53:44,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:53:44,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:53:44,074 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:53:44,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:53:44,074 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:53:44,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:53:44,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:53:44,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:53:44,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:53:44,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:53:44,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:53:44,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:53:44,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:53:44,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:53:44,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:53:44,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:53:44,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:53:44,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:53:44,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:53:44,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:53:44,408 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:53:44,411 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:53:44,414 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:53:44,417 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:53:44,418 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-12 19:53:44,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cee4ef81/660738ebc0af410b9ae08bae843ba63c/FLAGdcd7462ce [2020-10-12 19:53:44,994 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:53:44,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-12 19:53:45,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cee4ef81/660738ebc0af410b9ae08bae843ba63c/FLAGdcd7462ce [2020-10-12 19:53:45,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2cee4ef81/660738ebc0af410b9ae08bae843ba63c [2020-10-12 19:53:45,340 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:53:45,342 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:53:45,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:53:45,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:53:45,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:53:45,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:53:45" (1/1) ... [2020-10-12 19:53:45,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3768dcb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:45, skipping insertion in model container [2020-10-12 19:53:45,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:53:45" (1/1) ... [2020-10-12 19:53:45,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:53:45,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:53:45,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:53:45,886 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:53:46,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:53:46,022 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:53:46,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:46 WrapperNode [2020-10-12 19:53:46,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:53:46,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:53:46,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:53:46,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:53:46,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:46" (1/1) ... [2020-10-12 19:53:46,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:46" (1/1) ... [2020-10-12 19:53:46,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:46" (1/1) ... [2020-10-12 19:53:46,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:46" (1/1) ... [2020-10-12 19:53:46,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:46" (1/1) ... [2020-10-12 19:53:46,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:46" (1/1) ... [2020-10-12 19:53:46,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:46" (1/1) ... [2020-10-12 19:53:46,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:53:46,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:53:46,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:53:46,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:53:46,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:53:46,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:53:46,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:53:46,151 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:53:46,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:53:46,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:53:46,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:53:46,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:53:46,151 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:53:46,151 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:53:46,152 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:53:46,152 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:53:46,152 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:53:46,152 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:53:46,152 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:53:46,152 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:53:46,153 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:53:46,153 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:53:46,153 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:53:46,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:53:46,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:53:46,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:53:46,893 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:53:46,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:53:46 BoogieIcfgContainer [2020-10-12 19:53:46,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:53:46,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:53:46,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:53:46,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:53:46,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:53:45" (1/3) ... [2020-10-12 19:53:46,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104d93e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:53:46, skipping insertion in model container [2020-10-12 19:53:46,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:53:46" (2/3) ... [2020-10-12 19:53:46,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104d93e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:53:46, skipping insertion in model container [2020-10-12 19:53:46,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:53:46" (3/3) ... [2020-10-12 19:53:46,908 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-12 19:53:46,919 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:53:46,926 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:53:46,941 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:53:46,968 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:53:46,969 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:53:46,969 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:53:46,969 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:53:46,970 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:53:46,970 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:53:46,970 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:53:46,970 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:53:46,993 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states. [2020-10-12 19:53:47,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 19:53:47,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:47,004 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] [2020-10-12 19:53:47,004 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:47,011 INFO L82 PathProgramCache]: Analyzing trace with hash 962755420, now seen corresponding path program 1 times [2020-10-12 19:53:47,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:47,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464217090] [2020-10-12 19:53:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:47,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:47,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:47,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:49,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:49,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 19:53:49,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:53:49,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1774 [2020-10-12 19:53:49,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:49,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:53:49,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 19:53:49,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 19:53:49,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:53:49,365 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 19:53:49,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:49,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:49,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:49,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:49,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:49,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:53:49,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:49,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:49,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:49,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:49,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:53:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:49,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464217090] [2020-10-12 19:53:49,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:49,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:53:49,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150642355] [2020-10-12 19:53:49,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:53:49,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:49,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:53:49,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:53:49,483 INFO L87 Difference]: Start difference. First operand 153 states. Second operand 6 states. [2020-10-12 19:53:50,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:50,798 INFO L93 Difference]: Finished difference Result 453 states and 740 transitions. [2020-10-12 19:53:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:53:50,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-12 19:53:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:50,817 INFO L225 Difference]: With dead ends: 453 [2020-10-12 19:53:50,817 INFO L226 Difference]: Without dead ends: 330 [2020-10-12 19:53:50,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:53:50,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-12 19:53:50,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 326. [2020-10-12 19:53:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-12 19:53:50,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 479 transitions. [2020-10-12 19:53:50,910 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 479 transitions. Word has length 53 [2020-10-12 19:53:50,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:50,910 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 479 transitions. [2020-10-12 19:53:50,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:53:50,911 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 479 transitions. [2020-10-12 19:53:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 19:53:50,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:50,914 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] [2020-10-12 19:53:50,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:53:50,914 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:50,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:50,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1426780912, now seen corresponding path program 1 times [2020-10-12 19:53:50,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:50,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196109488] [2020-10-12 19:53:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:50,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:50,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:51,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:51,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:51,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 19:53:51,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:53:51,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 904 [2020-10-12 19:53:51,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:51,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:53:51,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:53:51,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 19:53:51,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:53:52,083 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 19:53:52,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:52,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:52,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:52,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:52,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:52,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:53:52,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:52,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:52,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:52,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:52,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:53:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:52,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196109488] [2020-10-12 19:53:52,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:52,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:53:52,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15384101] [2020-10-12 19:53:52,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:53:52,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:52,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:53:52,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:53:52,150 INFO L87 Difference]: Start difference. First operand 326 states and 479 transitions. Second operand 6 states. [2020-10-12 19:53:52,346 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 19:53:53,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:53:53,103 INFO L93 Difference]: Finished difference Result 918 states and 1392 transitions. [2020-10-12 19:53:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:53:53,104 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-12 19:53:53,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:53:53,111 INFO L225 Difference]: With dead ends: 918 [2020-10-12 19:53:53,112 INFO L226 Difference]: Without dead ends: 773 [2020-10-12 19:53:53,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:53:53,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2020-10-12 19:53:53,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 553. [2020-10-12 19:53:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-10-12 19:53:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 823 transitions. [2020-10-12 19:53:53,200 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 823 transitions. Word has length 54 [2020-10-12 19:53:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:53:53,201 INFO L479 AbstractCegarLoop]: Abstraction has 553 states and 823 transitions. [2020-10-12 19:53:53,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:53:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 823 transitions. [2020-10-12 19:53:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:53:53,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:53:53,211 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] [2020-10-12 19:53:53,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:53:53,212 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:53:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:53:53,212 INFO L82 PathProgramCache]: Analyzing trace with hash -718304572, now seen corresponding path program 1 times [2020-10-12 19:53:53,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:53:53,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502981683] [2020-10-12 19:53:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:53:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:53,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:53,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:53,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:53,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:53,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:55,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:58,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:58,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:53:58,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:53:58,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 19:53:58,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 19:53:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 19:53:58,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 19:53:58,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:58,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:53:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:53:58,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:53:58,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:53:58,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:53:58,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:53:58,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:53:58,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:53:58,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:53:58,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:53:58,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:53:58,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:53:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:53:58,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502981683] [2020-10-12 19:53:58,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:53:58,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 19:53:58,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855650207] [2020-10-12 19:53:58,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 19:53:58,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:53:58,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 19:53:58,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:53:58,463 INFO L87 Difference]: Start difference. First operand 553 states and 823 transitions. Second operand 9 states. [2020-10-12 19:54:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:00,036 INFO L93 Difference]: Finished difference Result 4006 states and 6040 transitions. [2020-10-12 19:54:00,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:54:00,036 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-12 19:54:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:00,057 INFO L225 Difference]: With dead ends: 4006 [2020-10-12 19:54:00,057 INFO L226 Difference]: Without dead ends: 3511 [2020-10-12 19:54:00,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-12 19:54:00,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2020-10-12 19:54:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 1238. [2020-10-12 19:54:00,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1238 states. [2020-10-12 19:54:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1860 transitions. [2020-10-12 19:54:00,173 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1860 transitions. Word has length 57 [2020-10-12 19:54:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:00,176 INFO L479 AbstractCegarLoop]: Abstraction has 1238 states and 1860 transitions. [2020-10-12 19:54:00,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 19:54:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1860 transitions. [2020-10-12 19:54:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:54:00,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:00,178 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] [2020-10-12 19:54:00,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:54:00,179 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:00,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1304990076, now seen corresponding path program 1 times [2020-10-12 19:54:00,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:00,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050304252] [2020-10-12 19:54:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:00,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:00,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:00,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:00,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:01,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:02,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:02,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:02,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:05,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:05,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:54:05,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:54:05,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:54:05,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:05,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:54:05,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:54:05,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 19:54:05,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:05,659 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2020-10-12 19:54:05,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:05,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:05,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:05,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:05,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:05,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-12 19:54:05,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:05,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:54:05,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:05,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:54:05,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:05,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050304252] [2020-10-12 19:54:05,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:05,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:54:05,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819007753] [2020-10-12 19:54:05,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:54:05,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:05,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:54:05,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:54:05,868 INFO L87 Difference]: Start difference. First operand 1238 states and 1860 transitions. Second operand 11 states. [2020-10-12 19:54:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:08,992 INFO L93 Difference]: Finished difference Result 4539 states and 6800 transitions. [2020-10-12 19:54:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 19:54:08,993 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-12 19:54:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:09,013 INFO L225 Difference]: With dead ends: 4539 [2020-10-12 19:54:09,013 INFO L226 Difference]: Without dead ends: 4021 [2020-10-12 19:54:09,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=364, Invalid=1276, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 19:54:09,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2020-10-12 19:54:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 1311. [2020-10-12 19:54:09,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1311 states. [2020-10-12 19:54:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1964 transitions. [2020-10-12 19:54:09,157 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1964 transitions. Word has length 57 [2020-10-12 19:54:09,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:09,158 INFO L479 AbstractCegarLoop]: Abstraction has 1311 states and 1964 transitions. [2020-10-12 19:54:09,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:54:09,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1964 transitions. [2020-10-12 19:54:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:54:09,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:09,160 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] [2020-10-12 19:54:09,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:54:09,160 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1440067778, now seen corresponding path program 1 times [2020-10-12 19:54:09,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:09,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730723019] [2020-10-12 19:54:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:09,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:09,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:09,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:09,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:09,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:11,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:11,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:54:11,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:54:11,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2417 [2020-10-12 19:54:11,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:11,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:54:11,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:54:11,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:54:11,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:11,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:11,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:11,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:11,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:11,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:11,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:54:11,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:11,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:54:11,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:11,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:54:11,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:11,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730723019] [2020-10-12 19:54:11,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:11,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:54:11,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739635563] [2020-10-12 19:54:11,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:54:11,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:11,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:54:11,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:54:11,857 INFO L87 Difference]: Start difference. First operand 1311 states and 1964 transitions. Second operand 8 states. [2020-10-12 19:54:11,989 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 19:54:13,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:13,269 INFO L93 Difference]: Finished difference Result 6512 states and 9726 transitions. [2020-10-12 19:54:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:54:13,270 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-12 19:54:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:13,295 INFO L225 Difference]: With dead ends: 6512 [2020-10-12 19:54:13,295 INFO L226 Difference]: Without dead ends: 5442 [2020-10-12 19:54:13,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:54:13,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5442 states. [2020-10-12 19:54:13,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5442 to 1390. [2020-10-12 19:54:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1390 states. [2020-10-12 19:54:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 2036 transitions. [2020-10-12 19:54:13,466 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 2036 transitions. Word has length 57 [2020-10-12 19:54:13,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:13,467 INFO L479 AbstractCegarLoop]: Abstraction has 1390 states and 2036 transitions. [2020-10-12 19:54:13,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:54:13,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 2036 transitions. [2020-10-12 19:54:13,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:54:13,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:13,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:13,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:54:13,469 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:13,470 INFO L82 PathProgramCache]: Analyzing trace with hash -570377195, now seen corresponding path program 1 times [2020-10-12 19:54:13,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:13,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070706110] [2020-10-12 19:54:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:13,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:13,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:13,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:13,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:13,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:13,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:14,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:16,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:18,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:18,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:54:18,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:54:18,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:54:18,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:18,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:54:18,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:54:18,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 19:54:18,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:54:18,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:18,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:18,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:18,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:18,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:18,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:54:18,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:18,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:54:18,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:18,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:54:18,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:18,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070706110] [2020-10-12 19:54:18,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:18,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:54:18,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426490118] [2020-10-12 19:54:18,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:54:18,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:18,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:54:18,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:54:18,809 INFO L87 Difference]: Start difference. First operand 1390 states and 2036 transitions. Second operand 11 states. [2020-10-12 19:54:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:21,686 INFO L93 Difference]: Finished difference Result 9193 states and 13605 transitions. [2020-10-12 19:54:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 19:54:21,686 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-12 19:54:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:21,723 INFO L225 Difference]: With dead ends: 9193 [2020-10-12 19:54:21,723 INFO L226 Difference]: Without dead ends: 7970 [2020-10-12 19:54:21,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 19:54:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7970 states. [2020-10-12 19:54:22,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7970 to 3661. [2020-10-12 19:54:22,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3661 states. [2020-10-12 19:54:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 5382 transitions. [2020-10-12 19:54:22,167 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 5382 transitions. Word has length 57 [2020-10-12 19:54:22,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:22,167 INFO L479 AbstractCegarLoop]: Abstraction has 3661 states and 5382 transitions. [2020-10-12 19:54:22,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:54:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 5382 transitions. [2020-10-12 19:54:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:54:22,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:22,170 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] [2020-10-12 19:54:22,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:54:22,170 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:22,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:22,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1157062699, now seen corresponding path program 1 times [2020-10-12 19:54:22,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:22,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282686237] [2020-10-12 19:54:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:22,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:22,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:22,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:22,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:22,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:24,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:24,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:54:24,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:54:24,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2182 [2020-10-12 19:54:24,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:24,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:54:24,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:54:24,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:54:24,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:24,632 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 19:54:24,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:24,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:24,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:24,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:24,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:24,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 19:54:24,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:24,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:54:24,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:24,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:54:24,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:54:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:24,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282686237] [2020-10-12 19:54:24,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:24,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:54:24,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005891203] [2020-10-12 19:54:24,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:54:24,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:24,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:54:24,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:54:24,704 INFO L87 Difference]: Start difference. First operand 3661 states and 5382 transitions. Second operand 8 states. [2020-10-12 19:54:24,876 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 19:54:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:26,782 INFO L93 Difference]: Finished difference Result 13349 states and 19550 transitions. [2020-10-12 19:54:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:54:26,783 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-12 19:54:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:26,815 INFO L225 Difference]: With dead ends: 13349 [2020-10-12 19:54:26,815 INFO L226 Difference]: Without dead ends: 10396 [2020-10-12 19:54:26,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:54:26,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10396 states. [2020-10-12 19:54:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10396 to 3544. [2020-10-12 19:54:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3544 states. [2020-10-12 19:54:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 5148 transitions. [2020-10-12 19:54:27,254 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 5148 transitions. Word has length 57 [2020-10-12 19:54:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:27,254 INFO L479 AbstractCegarLoop]: Abstraction has 3544 states and 5148 transitions. [2020-10-12 19:54:27,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:54:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 5148 transitions. [2020-10-12 19:54:27,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:54:27,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:27,257 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] [2020-10-12 19:54:27,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:54:27,257 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:27,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:27,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1491106980, now seen corresponding path program 1 times [2020-10-12 19:54:27,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:27,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740650752] [2020-10-12 19:54:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:27,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:27,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:27,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:27,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:27,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:29,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:29,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:54:29,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:54:29,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1952 [2020-10-12 19:54:29,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:54:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:54:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:54:29,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:29,465 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 19:54:29,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:29,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:29,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:29,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:29,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:29,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:54:29,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:29,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:54:29,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:29,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:54:29,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:29,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740650752] [2020-10-12 19:54:29,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:29,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:54:29,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59828599] [2020-10-12 19:54:29,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:54:29,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:29,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:54:29,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:54:29,508 INFO L87 Difference]: Start difference. First operand 3544 states and 5148 transitions. Second operand 8 states. [2020-10-12 19:54:31,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:31,178 INFO L93 Difference]: Finished difference Result 10601 states and 15339 transitions. [2020-10-12 19:54:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:54:31,178 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-12 19:54:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:31,195 INFO L225 Difference]: With dead ends: 10601 [2020-10-12 19:54:31,196 INFO L226 Difference]: Without dead ends: 7657 [2020-10-12 19:54:31,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:54:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7657 states. [2020-10-12 19:54:31,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7657 to 1388. [2020-10-12 19:54:31,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2020-10-12 19:54:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1974 transitions. [2020-10-12 19:54:31,468 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1974 transitions. Word has length 58 [2020-10-12 19:54:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:31,468 INFO L479 AbstractCegarLoop]: Abstraction has 1388 states and 1974 transitions. [2020-10-12 19:54:31,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:54:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1974 transitions. [2020-10-12 19:54:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:54:31,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:31,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:31,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:54:31,470 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:31,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:31,470 INFO L82 PathProgramCache]: Analyzing trace with hash 667265370, now seen corresponding path program 1 times [2020-10-12 19:54:31,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:31,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843075821] [2020-10-12 19:54:31,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:31,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:31,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:31,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:31,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:31,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:31,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:32,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:33,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:36,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:36,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:54:36,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:54:36,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4760 [2020-10-12 19:54:36,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:36,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:54:36,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:54:36,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:54:36,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:36,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:36,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:36,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:36,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:36,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:36,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:54:36,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:54:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:54:36,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:36,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843075821] [2020-10-12 19:54:36,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:36,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:54:36,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215187060] [2020-10-12 19:54:36,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:54:36,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:36,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:54:36,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:54:36,526 INFO L87 Difference]: Start difference. First operand 1388 states and 1974 transitions. Second operand 11 states. [2020-10-12 19:54:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:41,138 INFO L93 Difference]: Finished difference Result 13239 states and 19011 transitions. [2020-10-12 19:54:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 19:54:41,138 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-12 19:54:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:41,162 INFO L225 Difference]: With dead ends: 13239 [2020-10-12 19:54:41,163 INFO L226 Difference]: Without dead ends: 12893 [2020-10-12 19:54:41,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=945, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 19:54:41,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12893 states. [2020-10-12 19:54:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12893 to 1502. [2020-10-12 19:54:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1502 states. [2020-10-12 19:54:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 2126 transitions. [2020-10-12 19:54:41,500 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 2126 transitions. Word has length 58 [2020-10-12 19:54:41,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:41,500 INFO L479 AbstractCegarLoop]: Abstraction has 1502 states and 2126 transitions. [2020-10-12 19:54:41,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:54:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 2126 transitions. [2020-10-12 19:54:41,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 19:54:41,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:41,502 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] [2020-10-12 19:54:41,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:54:41,502 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:41,502 INFO L82 PathProgramCache]: Analyzing trace with hash 456237283, now seen corresponding path program 1 times [2020-10-12 19:54:41,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:41,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104963033] [2020-10-12 19:54:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:41,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:41,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:41,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:42,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:42,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 19:54:42,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:54:42,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 673 [2020-10-12 19:54:42,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:42,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:54:42,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:54:42,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 19:54:42,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:42,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:42,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:42,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:42,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:42,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:42,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:54:42,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:42,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:54:42,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:42,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:54:42,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:42,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104963033] [2020-10-12 19:54:42,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:42,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:54:42,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176803400] [2020-10-12 19:54:42,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:54:42,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:42,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:54:42,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:54:42,507 INFO L87 Difference]: Start difference. First operand 1502 states and 2126 transitions. Second operand 10 states. [2020-10-12 19:54:42,645 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 19:54:44,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:44,316 INFO L93 Difference]: Finished difference Result 3361 states and 4807 transitions. [2020-10-12 19:54:44,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 19:54:44,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-12 19:54:44,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:44,322 INFO L225 Difference]: With dead ends: 3361 [2020-10-12 19:54:44,323 INFO L226 Difference]: Without dead ends: 3175 [2020-10-12 19:54:44,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-12 19:54:44,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3175 states. [2020-10-12 19:54:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3175 to 1381. [2020-10-12 19:54:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1381 states. [2020-10-12 19:54:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 1957 transitions. [2020-10-12 19:54:44,636 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 1957 transitions. Word has length 58 [2020-10-12 19:54:44,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:44,636 INFO L479 AbstractCegarLoop]: Abstraction has 1381 states and 1957 transitions. [2020-10-12 19:54:44,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:54:44,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 1957 transitions. [2020-10-12 19:54:44,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 19:54:44,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:44,638 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] [2020-10-12 19:54:44,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:54:44,638 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:44,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1978652376, now seen corresponding path program 1 times [2020-10-12 19:54:44,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:44,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758794342] [2020-10-12 19:54:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:44,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:44,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:44,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:45,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:45,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 19:54:45,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:54:45,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 726 [2020-10-12 19:54:45,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:45,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:54:45,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:54:45,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 19:54:45,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:45,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:45,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:45,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:45,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:45,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:45,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:54:45,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:45,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:54:45,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:45,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:54:45,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:45,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758794342] [2020-10-12 19:54:45,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:45,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:54:45,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137986688] [2020-10-12 19:54:45,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:54:45,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:45,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:54:45,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:54:45,675 INFO L87 Difference]: Start difference. First operand 1381 states and 1957 transitions. Second operand 10 states. [2020-10-12 19:54:45,816 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-12 19:54:48,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:48,531 INFO L93 Difference]: Finished difference Result 5921 states and 8583 transitions. [2020-10-12 19:54:48,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 19:54:48,531 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-12 19:54:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:48,543 INFO L225 Difference]: With dead ends: 5921 [2020-10-12 19:54:48,543 INFO L226 Difference]: Without dead ends: 5575 [2020-10-12 19:54:48,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-12 19:54:48,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5575 states. [2020-10-12 19:54:48,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5575 to 1237. [2020-10-12 19:54:48,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1237 states. [2020-10-12 19:54:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1757 transitions. [2020-10-12 19:54:48,892 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1757 transitions. Word has length 59 [2020-10-12 19:54:48,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:48,892 INFO L479 AbstractCegarLoop]: Abstraction has 1237 states and 1757 transitions. [2020-10-12 19:54:48,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:54:48,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1757 transitions. [2020-10-12 19:54:48,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 19:54:48,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:48,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:48,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:54:48,895 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:48,895 INFO L82 PathProgramCache]: Analyzing trace with hash -63907971, now seen corresponding path program 1 times [2020-10-12 19:54:48,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:48,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122108613] [2020-10-12 19:54:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:48,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:48,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:48,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:49,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:49,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:49,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 19:54:49,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:54:49,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 992 [2020-10-12 19:54:49,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:49,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:54:49,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:54:49,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 19:54:49,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:50,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:50,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:50,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:50,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:50,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:50,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:54:50,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:50,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:54:50,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:50,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:54:50,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:50,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122108613] [2020-10-12 19:54:50,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:50,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:54:50,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887759350] [2020-10-12 19:54:50,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:54:50,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:50,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:54:50,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:54:50,054 INFO L87 Difference]: Start difference. First operand 1237 states and 1757 transitions. Second operand 6 states. [2020-10-12 19:54:50,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:50,962 INFO L93 Difference]: Finished difference Result 2739 states and 3959 transitions. [2020-10-12 19:54:50,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:54:50,963 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-12 19:54:50,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:50,965 INFO L225 Difference]: With dead ends: 2739 [2020-10-12 19:54:50,965 INFO L226 Difference]: Without dead ends: 1657 [2020-10-12 19:54:50,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:54:50,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2020-10-12 19:54:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1655. [2020-10-12 19:54:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1655 states. [2020-10-12 19:54:51,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 2371 transitions. [2020-10-12 19:54:51,414 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 2371 transitions. Word has length 73 [2020-10-12 19:54:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:51,415 INFO L479 AbstractCegarLoop]: Abstraction has 1655 states and 2371 transitions. [2020-10-12 19:54:51,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:54:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 2371 transitions. [2020-10-12 19:54:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 19:54:51,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:51,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:51,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:54:51,418 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:51,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:51,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1279215310, now seen corresponding path program 1 times [2020-10-12 19:54:51,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:51,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576555589] [2020-10-12 19:54:51,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:51,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:51,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:51,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:51,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:52,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:52,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 19:54:52,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:54:52,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 835 [2020-10-12 19:54:52,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:52,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:54:52,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:54:52,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 19:54:52,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:52,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:52,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:52,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:52,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:52,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:52,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:54:52,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:52,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:54:52,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:52,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:54:52,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:52,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576555589] [2020-10-12 19:54:52,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:52,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:54:52,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244788174] [2020-10-12 19:54:52,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:54:52,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:52,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:54:52,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:54:52,416 INFO L87 Difference]: Start difference. First operand 1655 states and 2371 transitions. Second operand 6 states. [2020-10-12 19:54:53,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:53,565 INFO L93 Difference]: Finished difference Result 2373 states and 3403 transitions. [2020-10-12 19:54:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:54:53,566 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-12 19:54:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:53,569 INFO L225 Difference]: With dead ends: 2373 [2020-10-12 19:54:53,570 INFO L226 Difference]: Without dead ends: 1957 [2020-10-12 19:54:53,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:54:53,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2020-10-12 19:54:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1955. [2020-10-12 19:54:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1955 states. [2020-10-12 19:54:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2807 transitions. [2020-10-12 19:54:54,013 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2807 transitions. Word has length 73 [2020-10-12 19:54:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:54,013 INFO L479 AbstractCegarLoop]: Abstraction has 1955 states and 2807 transitions. [2020-10-12 19:54:54,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:54:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2807 transitions. [2020-10-12 19:54:54,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 19:54:54,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:54,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:54,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:54:54,016 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:54,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2079547371, now seen corresponding path program 1 times [2020-10-12 19:54:54,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:54,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283123934] [2020-10-12 19:54:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:54,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:54,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:54,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:54,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:54,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:54,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:57,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:57,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 19:54:57,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:54:57,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3505 [2020-10-12 19:54:57,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:57,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:54:57,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 19:54:57,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 19:54:57,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:57,696 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 19:54:57,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:57,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:57,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:57,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:57,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:57,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:54:57,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:54:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:54:57,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:54:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:54:57,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283123934] [2020-10-12 19:54:57,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:57,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:54:57,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287958765] [2020-10-12 19:54:57,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:54:57,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:57,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:54:57,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:54:57,714 INFO L87 Difference]: Start difference. First operand 1955 states and 2807 transitions. Second operand 6 states. [2020-10-12 19:54:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:59,372 INFO L93 Difference]: Finished difference Result 4473 states and 6398 transitions. [2020-10-12 19:54:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:54:59,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-12 19:54:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:59,377 INFO L225 Difference]: With dead ends: 4473 [2020-10-12 19:54:59,378 INFO L226 Difference]: Without dead ends: 4471 [2020-10-12 19:54:59,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:54:59,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4471 states. [2020-10-12 19:54:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4471 to 2063. [2020-10-12 19:54:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2063 states. [2020-10-12 19:54:59,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 2915 transitions. [2020-10-12 19:54:59,904 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 2915 transitions. Word has length 74 [2020-10-12 19:54:59,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:59,905 INFO L479 AbstractCegarLoop]: Abstraction has 2063 states and 2915 transitions. [2020-10-12 19:54:59,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:54:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 2915 transitions. [2020-10-12 19:54:59,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 19:54:59,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:59,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:59,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:54:59,908 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:59,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1911725606, now seen corresponding path program 1 times [2020-10-12 19:54:59,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:59,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205842215] [2020-10-12 19:54:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:59,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:59,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:59,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:00,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:00,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:00,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:00,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:02,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:02,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 19:55:02,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:55:02,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2798 [2020-10-12 19:55:02,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:02,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:55:02,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:02,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 19:55:02,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:02,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:02,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:02,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:02,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:02,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:02,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:55:02,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:02,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:02,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:02,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:02,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:02,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205842215] [2020-10-12 19:55:02,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:02,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:55:02,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420975784] [2020-10-12 19:55:02,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:55:02,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:02,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:55:02,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:55:02,893 INFO L87 Difference]: Start difference. First operand 2063 states and 2915 transitions. Second operand 6 states. [2020-10-12 19:55:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:04,379 INFO L93 Difference]: Finished difference Result 5747 states and 8222 transitions. [2020-10-12 19:55:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:55:04,384 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-12 19:55:04,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:04,388 INFO L225 Difference]: With dead ends: 5747 [2020-10-12 19:55:04,388 INFO L226 Difference]: Without dead ends: 3769 [2020-10-12 19:55:04,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:55:04,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2020-10-12 19:55:05,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3767. [2020-10-12 19:55:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3767 states. [2020-10-12 19:55:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 5356 transitions. [2020-10-12 19:55:05,290 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 5356 transitions. Word has length 75 [2020-10-12 19:55:05,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:05,291 INFO L479 AbstractCegarLoop]: Abstraction has 3767 states and 5356 transitions. [2020-10-12 19:55:05,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:55:05,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 5356 transitions. [2020-10-12 19:55:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 19:55:05,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:05,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:05,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:55:05,295 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:05,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1588036383, now seen corresponding path program 1 times [2020-10-12 19:55:05,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:05,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349278855] [2020-10-12 19:55:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:05,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:05,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:05,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:05,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:06,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:06,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:07,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:07,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 19:55:07,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:55:07,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2006 [2020-10-12 19:55:07,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:55:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:55:07,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:07,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:07,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:07,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:07,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:07,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:07,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:55:07,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:07,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:07,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:07,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:07,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:07,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349278855] [2020-10-12 19:55:07,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:07,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:55:07,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061371921] [2020-10-12 19:55:07,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:55:07,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:07,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:55:07,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:55:07,583 INFO L87 Difference]: Start difference. First operand 3767 states and 5356 transitions. Second operand 11 states. [2020-10-12 19:55:07,815 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 19:55:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:10,643 INFO L93 Difference]: Finished difference Result 8553 states and 12226 transitions. [2020-10-12 19:55:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 19:55:10,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2020-10-12 19:55:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:10,649 INFO L225 Difference]: With dead ends: 8553 [2020-10-12 19:55:10,649 INFO L226 Difference]: Without dead ends: 6141 [2020-10-12 19:55:10,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-12 19:55:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6141 states. [2020-10-12 19:55:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6141 to 3767. [2020-10-12 19:55:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3767 states. [2020-10-12 19:55:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 5350 transitions. [2020-10-12 19:55:11,519 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 5350 transitions. Word has length 75 [2020-10-12 19:55:11,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:11,520 INFO L479 AbstractCegarLoop]: Abstraction has 3767 states and 5350 transitions. [2020-10-12 19:55:11,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:55:11,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 5350 transitions. [2020-10-12 19:55:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 19:55:11,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:11,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:11,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:55:11,522 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:11,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:11,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1817419905, now seen corresponding path program 1 times [2020-10-12 19:55:11,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:11,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103383566] [2020-10-12 19:55:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:11,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:11,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:11,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:11,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:12,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:12,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:13,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:13,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 19:55:13,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:55:13,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2081 [2020-10-12 19:55:13,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:13,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:55:13,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:13,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 19:55:13,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:13,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:13,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:13,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:13,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:13,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:13,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:55:13,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:13,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:13,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:13,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:13,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:13,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103383566] [2020-10-12 19:55:13,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:13,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:55:13,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898044249] [2020-10-12 19:55:13,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:55:13,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:13,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:55:13,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:55:13,907 INFO L87 Difference]: Start difference. First operand 3767 states and 5350 transitions. Second operand 11 states. [2020-10-12 19:55:14,116 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 19:55:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:17,217 INFO L93 Difference]: Finished difference Result 6421 states and 9072 transitions. [2020-10-12 19:55:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 19:55:17,218 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2020-10-12 19:55:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:17,223 INFO L225 Difference]: With dead ends: 6421 [2020-10-12 19:55:17,224 INFO L226 Difference]: Without dead ends: 5741 [2020-10-12 19:55:17,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-10-12 19:55:17,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5741 states. [2020-10-12 19:55:18,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5741 to 3767. [2020-10-12 19:55:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3767 states. [2020-10-12 19:55:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 5346 transitions. [2020-10-12 19:55:18,128 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 5346 transitions. Word has length 75 [2020-10-12 19:55:18,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:18,128 INFO L479 AbstractCegarLoop]: Abstraction has 3767 states and 5346 transitions. [2020-10-12 19:55:18,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:55:18,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 5346 transitions. [2020-10-12 19:55:18,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 19:55:18,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:18,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:18,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:55:18,132 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:18,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1637178472, now seen corresponding path program 1 times [2020-10-12 19:55:18,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:18,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993097104] [2020-10-12 19:55:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:18,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:18,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:18,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:18,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:18,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:18,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:20,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:20,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:23,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:23,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 19:55:23,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:55:23,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:55:23,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:23,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:55:23,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:23,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:55:23,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:23,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:23,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:23,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:23,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:23,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:23,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:55:23,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:23,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:23,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:23,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:23,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:23,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993097104] [2020-10-12 19:55:23,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:23,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:55:23,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984020435] [2020-10-12 19:55:23,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:55:23,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:23,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:55:23,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:55:23,411 INFO L87 Difference]: Start difference. First operand 3767 states and 5346 transitions. Second operand 11 states. [2020-10-12 19:55:23,586 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 19:55:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:27,356 INFO L93 Difference]: Finished difference Result 12377 states and 17704 transitions. [2020-10-12 19:55:27,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 19:55:27,357 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-10-12 19:55:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:27,366 INFO L225 Difference]: With dead ends: 12377 [2020-10-12 19:55:27,366 INFO L226 Difference]: Without dead ends: 8942 [2020-10-12 19:55:27,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-12 19:55:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8942 states. [2020-10-12 19:55:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8942 to 3743. [2020-10-12 19:55:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3743 states. [2020-10-12 19:55:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 5310 transitions. [2020-10-12 19:55:28,348 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 5310 transitions. Word has length 76 [2020-10-12 19:55:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:28,349 INFO L479 AbstractCegarLoop]: Abstraction has 3743 states and 5310 transitions. [2020-10-12 19:55:28,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:55:28,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 5310 transitions. [2020-10-12 19:55:28,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 19:55:28,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:28,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:28,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:55:28,351 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:28,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:28,352 INFO L82 PathProgramCache]: Analyzing trace with hash 403124840, now seen corresponding path program 1 times [2020-10-12 19:55:28,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:28,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673843633] [2020-10-12 19:55:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:28,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:28,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:28,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:28,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:28,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:28,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 19:55:28,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:55:28,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-12 19:55:28,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:28,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:55:28,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:55:28,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 19:55:28,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:28,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:28,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:28,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:28,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:28,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:28,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:55:28,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:28,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:28,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:28,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:28,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:28,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673843633] [2020-10-12 19:55:28,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:28,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:55:28,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375027855] [2020-10-12 19:55:28,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:55:28,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:28,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:55:28,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:55:28,892 INFO L87 Difference]: Start difference. First operand 3743 states and 5310 transitions. Second operand 5 states. [2020-10-12 19:55:29,024 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-12 19:55:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:30,848 INFO L93 Difference]: Finished difference Result 8505 states and 12100 transitions. [2020-10-12 19:55:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:55:30,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-12 19:55:30,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:30,855 INFO L225 Difference]: With dead ends: 8505 [2020-10-12 19:55:30,855 INFO L226 Difference]: Without dead ends: 5179 [2020-10-12 19:55:30,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:55:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2020-10-12 19:55:32,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 5177. [2020-10-12 19:55:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5177 states. [2020-10-12 19:55:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5177 states to 5177 states and 7258 transitions. [2020-10-12 19:55:32,265 INFO L78 Accepts]: Start accepts. Automaton has 5177 states and 7258 transitions. Word has length 76 [2020-10-12 19:55:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:32,265 INFO L479 AbstractCegarLoop]: Abstraction has 5177 states and 7258 transitions. [2020-10-12 19:55:32,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:55:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 5177 states and 7258 transitions. [2020-10-12 19:55:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 19:55:32,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:32,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:32,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:55:32,269 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:32,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:32,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1192564029, now seen corresponding path program 1 times [2020-10-12 19:55:32,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:32,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662794038] [2020-10-12 19:55:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:32,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:32,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:32,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:32,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:32,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:32,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 19:55:32,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:55:32,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-12 19:55:32,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:55:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:55:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 19:55:32,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:32,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:32,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:32,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:32,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:32,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:32,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:55:32,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:32,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:32,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:32,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:32,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:32,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662794038] [2020-10-12 19:55:32,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:32,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:55:32,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779043392] [2020-10-12 19:55:32,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:55:32,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:32,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:55:32,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:55:32,933 INFO L87 Difference]: Start difference. First operand 5177 states and 7258 transitions. Second operand 6 states. [2020-10-12 19:55:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:35,762 INFO L93 Difference]: Finished difference Result 11393 states and 16215 transitions. [2020-10-12 19:55:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:55:35,762 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-12 19:55:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:35,770 INFO L225 Difference]: With dead ends: 11393 [2020-10-12 19:55:35,770 INFO L226 Difference]: Without dead ends: 8067 [2020-10-12 19:55:35,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:55:35,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8067 states. [2020-10-12 19:55:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8067 to 8063. [2020-10-12 19:55:37,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8063 states. [2020-10-12 19:55:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8063 states to 8063 states and 11336 transitions. [2020-10-12 19:55:37,919 INFO L78 Accepts]: Start accepts. Automaton has 8063 states and 11336 transitions. Word has length 76 [2020-10-12 19:55:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:37,920 INFO L479 AbstractCegarLoop]: Abstraction has 8063 states and 11336 transitions. [2020-10-12 19:55:37,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:55:37,920 INFO L276 IsEmpty]: Start isEmpty. Operand 8063 states and 11336 transitions. [2020-10-12 19:55:37,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 19:55:37,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:37,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:37,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:55:37,923 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:37,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1074792308, now seen corresponding path program 1 times [2020-10-12 19:55:37,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:37,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270943672] [2020-10-12 19:55:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:37,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:37,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:38,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:38,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:38,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:38,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:38,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:39,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:40,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:40,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 19:55:40,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:55:40,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2229 [2020-10-12 19:55:40,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:40,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:55:40,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:40,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 19:55:40,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:40,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:40,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:40,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:40,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:40,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:40,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:55:40,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:40,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:40,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:40,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:40,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:40,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270943672] [2020-10-12 19:55:40,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:40,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:55:40,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676951294] [2020-10-12 19:55:40,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:55:40,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:40,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:55:40,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:55:40,462 INFO L87 Difference]: Start difference. First operand 8063 states and 11336 transitions. Second operand 12 states. [2020-10-12 19:55:40,665 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 19:55:51,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:51,020 INFO L93 Difference]: Finished difference Result 27636 states and 37995 transitions. [2020-10-12 19:55:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 19:55:51,021 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2020-10-12 19:55:51,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:51,047 INFO L225 Difference]: With dead ends: 27636 [2020-10-12 19:55:51,047 INFO L226 Difference]: Without dead ends: 24769 [2020-10-12 19:55:51,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=329, Invalid=1153, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 19:55:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24769 states. [2020-10-12 19:55:54,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24769 to 8263. [2020-10-12 19:55:54,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8263 states. [2020-10-12 19:55:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8263 states to 8263 states and 11642 transitions. [2020-10-12 19:55:54,121 INFO L78 Accepts]: Start accepts. Automaton has 8263 states and 11642 transitions. Word has length 77 [2020-10-12 19:55:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:54,121 INFO L479 AbstractCegarLoop]: Abstraction has 8263 states and 11642 transitions. [2020-10-12 19:55:54,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:55:54,121 INFO L276 IsEmpty]: Start isEmpty. Operand 8263 states and 11642 transitions. [2020-10-12 19:55:54,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 19:55:54,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:54,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:54,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 19:55:54,125 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:54,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:54,126 INFO L82 PathProgramCache]: Analyzing trace with hash -134894469, now seen corresponding path program 1 times [2020-10-12 19:55:54,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:54,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680021740] [2020-10-12 19:55:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:54,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:54,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:54,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:54,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:54,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:54,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:54,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 19:55:54,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:55:54,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-12 19:55:54,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:55:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:55:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 19:55:54,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:54,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:54,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:54,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:54,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:54,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:54,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:55:54,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:54,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:54,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680021740] [2020-10-12 19:55:54,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:54,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:55:54,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173456904] [2020-10-12 19:55:54,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:55:54,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:54,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:55:54,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:55:54,853 INFO L87 Difference]: Start difference. First operand 8263 states and 11642 transitions. Second operand 6 states. [2020-10-12 19:55:54,987 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 19:56:00,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:00,357 INFO L93 Difference]: Finished difference Result 20735 states and 29543 transitions. [2020-10-12 19:56:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:56:00,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-10-12 19:56:00,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:00,382 INFO L225 Difference]: With dead ends: 20735 [2020-10-12 19:56:00,382 INFO L226 Difference]: Without dead ends: 16908 [2020-10-12 19:56:00,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:56:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16908 states. [2020-10-12 19:56:04,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16908 to 12877. [2020-10-12 19:56:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12877 states. [2020-10-12 19:56:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12877 states to 12877 states and 18178 transitions. [2020-10-12 19:56:04,139 INFO L78 Accepts]: Start accepts. Automaton has 12877 states and 18178 transitions. Word has length 77 [2020-10-12 19:56:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:04,139 INFO L479 AbstractCegarLoop]: Abstraction has 12877 states and 18178 transitions. [2020-10-12 19:56:04,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:56:04,139 INFO L276 IsEmpty]: Start isEmpty. Operand 12877 states and 18178 transitions. [2020-10-12 19:56:04,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 19:56:04,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:04,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:04,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 19:56:04,143 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:04,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:04,143 INFO L82 PathProgramCache]: Analyzing trace with hash -771188374, now seen corresponding path program 1 times [2020-10-12 19:56:04,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:04,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394592878] [2020-10-12 19:56:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:04,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:04,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:04,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:04,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:04,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:04,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:04,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:06,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:06,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 19:56:06,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:56:06,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2218 [2020-10-12 19:56:06,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:06,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:56:06,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:06,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 19:56:06,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:06,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:06,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:06,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:06,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:06,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:06,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:56:06,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:06,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:06,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:06,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:06,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:06,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394592878] [2020-10-12 19:56:06,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:06,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:56:06,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626199432] [2020-10-12 19:56:06,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:56:06,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:06,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:56:06,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:56:06,560 INFO L87 Difference]: Start difference. First operand 12877 states and 18178 transitions. Second operand 8 states. [2020-10-12 19:56:06,698 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-12 19:56:14,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:14,352 INFO L93 Difference]: Finished difference Result 31702 states and 44343 transitions. [2020-10-12 19:56:14,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:56:14,353 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-10-12 19:56:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:14,381 INFO L225 Difference]: With dead ends: 31702 [2020-10-12 19:56:14,381 INFO L226 Difference]: Without dead ends: 21933 [2020-10-12 19:56:14,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:56:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21933 states. [2020-10-12 19:56:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21933 to 12754. [2020-10-12 19:56:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12754 states. [2020-10-12 19:56:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12754 states to 12754 states and 17971 transitions. [2020-10-12 19:56:18,202 INFO L78 Accepts]: Start accepts. Automaton has 12754 states and 17971 transitions. Word has length 77 [2020-10-12 19:56:18,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:18,202 INFO L479 AbstractCegarLoop]: Abstraction has 12754 states and 17971 transitions. [2020-10-12 19:56:18,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:56:18,203 INFO L276 IsEmpty]: Start isEmpty. Operand 12754 states and 17971 transitions. [2020-10-12 19:56:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 19:56:18,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:18,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:18,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 19:56:18,205 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:18,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1153137400, now seen corresponding path program 1 times [2020-10-12 19:56:18,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:18,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865794280] [2020-10-12 19:56:18,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:18,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:18,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:18,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:18,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:18,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:18,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:19,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 19:56:19,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:56:19,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1220 [2020-10-12 19:56:19,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:19,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:56:19,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:19,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 19:56:19,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:19,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:19,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:19,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:19,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:19,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:56:19,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:19,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:19,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:19,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:19,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:19,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865794280] [2020-10-12 19:56:19,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:19,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:56:19,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792503275] [2020-10-12 19:56:19,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:56:19,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:19,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:56:19,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:56:19,627 INFO L87 Difference]: Start difference. First operand 12754 states and 17971 transitions. Second operand 8 states. [2020-10-12 19:56:19,756 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-12 19:56:40,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:40,033 INFO L93 Difference]: Finished difference Result 66406 states and 91813 transitions. [2020-10-12 19:56:40,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:56:40,033 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-10-12 19:56:40,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:40,088 INFO L225 Difference]: With dead ends: 66406 [2020-10-12 19:56:40,088 INFO L226 Difference]: Without dead ends: 54119 [2020-10-12 19:56:40,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:56:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54119 states. [2020-10-12 19:56:50,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54119 to 26993. [2020-10-12 19:56:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26993 states. [2020-10-12 19:56:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26993 states to 26993 states and 37592 transitions. [2020-10-12 19:56:50,471 INFO L78 Accepts]: Start accepts. Automaton has 26993 states and 37592 transitions. Word has length 77 [2020-10-12 19:56:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:50,471 INFO L479 AbstractCegarLoop]: Abstraction has 26993 states and 37592 transitions. [2020-10-12 19:56:50,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:56:50,471 INFO L276 IsEmpty]: Start isEmpty. Operand 26993 states and 37592 transitions. [2020-10-12 19:56:50,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 19:56:50,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:50,483 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:50,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 19:56:50,484 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:50,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:50,484 INFO L82 PathProgramCache]: Analyzing trace with hash -577496818, now seen corresponding path program 1 times [2020-10-12 19:56:50,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:50,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735259296] [2020-10-12 19:56:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:50,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:50,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:50,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:50,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:50,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:50,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:52,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:52,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 19:56:52,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:56:52,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1742 [2020-10-12 19:56:52,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:52,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:52,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-12 19:56:52,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 19:56:52,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:52,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:52,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:52,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:52,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:52,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:52,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:56:52,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:52,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:56:52,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:52,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:56:52,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:52,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735259296] [2020-10-12 19:56:52,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:52,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:56:52,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722851058] [2020-10-12 19:56:52,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:56:52,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:52,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:56:52,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:56:52,405 INFO L87 Difference]: Start difference. First operand 26993 states and 37592 transitions. Second operand 4 states. [2020-10-12 19:56:52,588 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-12 19:57:04,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:57:04,652 INFO L93 Difference]: Finished difference Result 54521 states and 75813 transitions. [2020-10-12 19:57:04,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:57:04,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-10-12 19:57:04,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:57:04,688 INFO L225 Difference]: With dead ends: 54521 [2020-10-12 19:57:04,689 INFO L226 Difference]: Without dead ends: 34177 [2020-10-12 19:57:04,709 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 [2020-10-12 19:57:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34177 states. [2020-10-12 19:57:16,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34177 to 33167. [2020-10-12 19:57:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33167 states. [2020-10-12 19:57:16,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33167 states to 33167 states and 45882 transitions. [2020-10-12 19:57:16,643 INFO L78 Accepts]: Start accepts. Automaton has 33167 states and 45882 transitions. Word has length 95 [2020-10-12 19:57:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:16,643 INFO L479 AbstractCegarLoop]: Abstraction has 33167 states and 45882 transitions. [2020-10-12 19:57:16,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:57:16,643 INFO L276 IsEmpty]: Start isEmpty. Operand 33167 states and 45882 transitions. [2020-10-12 19:57:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 19:57:16,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:16,652 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:57:16,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 19:57:16,652 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash 544159790, now seen corresponding path program 1 times [2020-10-12 19:57:16,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:16,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2401635] [2020-10-12 19:57:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:16,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:16,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:16,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:16,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:16,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:17,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:17,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:18,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:18,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:21,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:21,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 19:57:21,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:57:21,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:57:21,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:21,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:57:21,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:57:21,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 19:57:21,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:21,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:21,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:21,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:21,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:21,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:21,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:57:21,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:21,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:57:21,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:21,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:57:21,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:21,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2401635] [2020-10-12 19:57:21,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:57:21,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:57:21,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976756283] [2020-10-12 19:57:21,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:57:21,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:21,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:57:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:57:21,871 INFO L87 Difference]: Start difference. First operand 33167 states and 45882 transitions. Second operand 8 states. [2020-10-12 19:57:22,007 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 117