/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 13:53:45,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 13:53:45,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 13:53:46,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 13:53:46,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 13:53:46,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 13:53:46,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 13:53:46,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 13:53:46,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 13:53:46,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 13:53:46,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 13:53:46,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 13:53:46,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 13:53:46,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 13:53:46,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 13:53:46,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 13:53:46,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 13:53:46,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 13:53:46,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 13:53:46,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 13:53:46,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 13:53:46,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 13:53:46,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 13:53:46,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 13:53:46,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 13:53:46,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 13:53:46,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 13:53:46,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 13:53:46,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 13:53:46,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 13:53:46,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 13:53:46,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 13:53:46,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 13:53:46,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 13:53:46,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 13:53:46,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 13:53:46,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 13:53:46,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 13:53:46,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 13:53:46,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 13:53:46,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 13:53:46,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 13:53:46,067 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 13:53:46,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 13:53:46,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 13:53:46,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 13:53:46,069 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 13:53:46,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 13:53:46,070 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 13:53:46,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 13:53:46,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 13:53:46,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 13:53:46,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 13:53:46,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 13:53:46,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 13:53:46,071 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 13:53:46,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 13:53:46,071 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 13:53:46,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 13:53:46,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 13:53:46,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 13:53:46,072 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 13:53:46,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 13:53:46,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:53:46,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 13:53:46,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 13:53:46,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 13:53:46,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 13:53:46,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 13:53:46,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 13:53:46,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 13:53:46,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 13:53:46,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 13:53:46,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 13:53:46,422 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 13:53:46,424 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 13:53:46,426 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 13:53:46,426 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 13:53:46,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/791f302ca/a64f047384114692b2af51616db232cd/FLAGdeff85c95 [2020-10-13 13:53:47,017 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 13:53:47,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 13:53:47,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/791f302ca/a64f047384114692b2af51616db232cd/FLAGdeff85c95 [2020-10-13 13:53:47,383 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/791f302ca/a64f047384114692b2af51616db232cd [2020-10-13 13:53:47,393 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 13:53:47,394 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 13:53:47,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 13:53:47,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 13:53:47,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 13:53:47,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:53:47" (1/1) ... [2020-10-13 13:53:47,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@243026c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:53:47, skipping insertion in model container [2020-10-13 13:53:47,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:53:47" (1/1) ... [2020-10-13 13:53:47,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 13:53:47,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 13:53:47,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:53:47,901 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 13:53:47,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:53:48,013 INFO L208 MainTranslator]: Completed translation [2020-10-13 13:53:48,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:53:48 WrapperNode [2020-10-13 13:53:48,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 13:53:48,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 13:53:48,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 13:53:48,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 13:53:48,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:53:48" (1/1) ... [2020-10-13 13:53:48,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:53:48" (1/1) ... [2020-10-13 13:53:48,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:53:48" (1/1) ... [2020-10-13 13:53:48,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:53:48" (1/1) ... [2020-10-13 13:53:48,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:53:48" (1/1) ... [2020-10-13 13:53:48,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:53:48" (1/1) ... [2020-10-13 13:53:48,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:53:48" (1/1) ... [2020-10-13 13:53:48,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 13:53:48,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 13:53:48,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 13:53:48,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 13:53:48,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:53:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:53:48,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 13:53:48,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 13:53:48,150 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 13:53:48,150 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 13:53:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 13:53:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 13:53:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 13:53:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 13:53:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 13:53:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 13:53:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 13:53:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 13:53:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 13:53:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 13:53:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 13:53:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 13:53:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 13:53:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 13:53:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 13:53:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 13:53:48,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 13:53:48,892 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 13:53:48,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:53:48 BoogieIcfgContainer [2020-10-13 13:53:48,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 13:53:48,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 13:53:48,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 13:53:48,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 13:53:48,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:53:47" (1/3) ... [2020-10-13 13:53:48,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348976c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:53:48, skipping insertion in model container [2020-10-13 13:53:48,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:53:48" (2/3) ... [2020-10-13 13:53:48,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348976c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:53:48, skipping insertion in model container [2020-10-13 13:53:48,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:53:48" (3/3) ... [2020-10-13 13:53:48,907 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 13:53:48,919 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 13:53:48,927 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 13:53:48,942 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 13:53:48,969 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 13:53:48,969 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 13:53:48,969 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 13:53:48,970 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 13:53:48,970 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 13:53:48,970 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 13:53:48,970 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 13:53:48,970 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 13:53:48,996 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-10-13 13:53:49,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 13:53:49,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:49,009 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] [2020-10-13 13:53:49,010 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:49,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:49,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1817058804, now seen corresponding path program 1 times [2020-10-13 13:53:49,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:49,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981248972] [2020-10-13 13:53:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:49,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:49,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:49,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:50,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:51,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:51,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 13:53:51,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:53:51,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2186 [2020-10-13 13:53:51,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:53:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 13:53:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 13:53:51,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 13:53:51,990 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:53:51,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:53:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:52,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:52,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:52,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:53:52,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:53:52,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 13:53:52,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:52,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:53:52,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:53:52,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:53:52,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:53:52,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981248972] [2020-10-13 13:53:52,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:53:52,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:53:52,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983830322] [2020-10-13 13:53:52,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:53:52,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:53:52,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:53:52,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:53:52,080 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 6 states. [2020-10-13 13:53:52,381 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 13:53:53,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:53:53,316 INFO L93 Difference]: Finished difference Result 632 states and 1063 transitions. [2020-10-13 13:53:53,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:53:53,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-13 13:53:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:53:53,339 INFO L225 Difference]: With dead ends: 632 [2020-10-13 13:53:53,339 INFO L226 Difference]: Without dead ends: 526 [2020-10-13 13:53:53,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:53:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-10-13 13:53:53,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 212. [2020-10-13 13:53:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 13:53:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 337 transitions. [2020-10-13 13:53:53,416 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 337 transitions. Word has length 61 [2020-10-13 13:53:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:53:53,417 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 337 transitions. [2020-10-13 13:53:53,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:53:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 337 transitions. [2020-10-13 13:53:53,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 13:53:53,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:53,421 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] [2020-10-13 13:53:53,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 13:53:53,421 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:53,422 INFO L82 PathProgramCache]: Analyzing trace with hash 432637612, now seen corresponding path program 1 times [2020-10-13 13:53:53,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:53,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348569646] [2020-10-13 13:53:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:53,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:53,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:53,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:54,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:54,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:55,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:55,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 13:53:55,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:53:55,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2486 [2020-10-13 13:53:55,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:55,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:53:55,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 13:53:55,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 13:53:55,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:53:56,286 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:53:56,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:53:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:56,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:56,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:56,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:53:56,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:53:56,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 13:53:56,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:56,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:53:56,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:53:56,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:53:56,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 13:53:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:53:56,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348569646] [2020-10-13 13:53:56,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:53:56,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 13:53:56,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537442978] [2020-10-13 13:53:56,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 13:53:56,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:53:56,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 13:53:56,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:53:56,362 INFO L87 Difference]: Start difference. First operand 212 states and 337 transitions. Second operand 7 states. [2020-10-13 13:53:56,609 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-13 13:53:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:53:57,895 INFO L93 Difference]: Finished difference Result 1293 states and 2150 transitions. [2020-10-13 13:53:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 13:53:57,896 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-13 13:53:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:53:57,906 INFO L225 Difference]: With dead ends: 1293 [2020-10-13 13:53:57,907 INFO L226 Difference]: Without dead ends: 1139 [2020-10-13 13:53:57,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-13 13:53:57,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-10-13 13:53:58,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 605. [2020-10-13 13:53:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2020-10-13 13:53:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 998 transitions. [2020-10-13 13:53:58,035 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 998 transitions. Word has length 62 [2020-10-13 13:53:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:53:58,036 INFO L479 AbstractCegarLoop]: Abstraction has 605 states and 998 transitions. [2020-10-13 13:53:58,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 13:53:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 998 transitions. [2020-10-13 13:53:58,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 13:53:58,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:58,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:53:58,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 13:53:58,056 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:58,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:58,056 INFO L82 PathProgramCache]: Analyzing trace with hash 469811643, now seen corresponding path program 1 times [2020-10-13 13:53:58,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:58,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358602309] [2020-10-13 13:53:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:58,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:58,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:58,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:58,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:58,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:00,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:00,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 13:54:00,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:54:00,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2766 [2020-10-13 13:54:00,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:00,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:54:00,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 13:54:00,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 13:54:00,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:54:01,181 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:54:01,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:01,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:01,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:01,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:01,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:01,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 13:54:01,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:01,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:01,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:01,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:01,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:54:01,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358602309] [2020-10-13 13:54:01,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:01,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:54:01,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222855779] [2020-10-13 13:54:01,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:54:01,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:01,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:54:01,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:54:01,217 INFO L87 Difference]: Start difference. First operand 605 states and 998 transitions. Second operand 5 states. [2020-10-13 13:54:01,417 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:54:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:02,078 INFO L93 Difference]: Finished difference Result 2113 states and 3536 transitions. [2020-10-13 13:54:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:54:02,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-13 13:54:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:02,088 INFO L225 Difference]: With dead ends: 2113 [2020-10-13 13:54:02,089 INFO L226 Difference]: Without dead ends: 1613 [2020-10-13 13:54:02,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:54:02,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2020-10-13 13:54:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1104. [2020-10-13 13:54:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1104 states. [2020-10-13 13:54:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1835 transitions. [2020-10-13 13:54:02,190 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1835 transitions. Word has length 63 [2020-10-13 13:54:02,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:02,191 INFO L479 AbstractCegarLoop]: Abstraction has 1104 states and 1835 transitions. [2020-10-13 13:54:02,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:54:02,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1835 transitions. [2020-10-13 13:54:02,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 13:54:02,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:02,193 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] [2020-10-13 13:54:02,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 13:54:02,194 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:02,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:02,195 INFO L82 PathProgramCache]: Analyzing trace with hash 976019405, now seen corresponding path program 1 times [2020-10-13 13:54:02,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:02,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756570282] [2020-10-13 13:54:02,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:02,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:02,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:02,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:02,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:03,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:04,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:04,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:07,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:07,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 13:54:07,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:54:07,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 13:54:07,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:07,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:54:07,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 13:54:07,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 13:54:07,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:54:07,480 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:54:07,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:07,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:07,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:07,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:07,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:07,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-13 13:54:07,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:07,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:07,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:07,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:07,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:54:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:54:07,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756570282] [2020-10-13 13:54:07,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:07,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:54:07,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341415134] [2020-10-13 13:54:07,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:54:07,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:07,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:54:07,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:54:07,544 INFO L87 Difference]: Start difference. First operand 1104 states and 1835 transitions. Second operand 4 states. [2020-10-13 13:54:07,799 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:54:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:08,677 INFO L93 Difference]: Finished difference Result 2861 states and 4788 transitions. [2020-10-13 13:54:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:54:08,678 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-13 13:54:08,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:08,688 INFO L225 Difference]: With dead ends: 2861 [2020-10-13 13:54:08,688 INFO L226 Difference]: Without dead ends: 1829 [2020-10-13 13:54:08,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:54:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2020-10-13 13:54:08,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1827. [2020-10-13 13:54:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1827 states. [2020-10-13 13:54:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 3035 transitions. [2020-10-13 13:54:08,821 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 3035 transitions. Word has length 64 [2020-10-13 13:54:08,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:08,821 INFO L479 AbstractCegarLoop]: Abstraction has 1827 states and 3035 transitions. [2020-10-13 13:54:08,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:54:08,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 3035 transitions. [2020-10-13 13:54:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 13:54:08,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:08,824 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] [2020-10-13 13:54:08,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 13:54:08,824 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:08,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:08,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1351417111, now seen corresponding path program 1 times [2020-10-13 13:54:08,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:08,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899571527] [2020-10-13 13:54:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:08,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:08,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:08,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:09,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:09,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:10,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:10,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:13,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:13,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 13:54:13,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:54:13,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 13:54:13,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:13,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:54:13,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 13:54:13,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 13:54:13,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:14,060 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:54:14,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:14,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:14,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:14,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:14,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:14,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:54:14,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:14,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:14,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:14,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:14,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:54:14,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899571527] [2020-10-13 13:54:14,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:14,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:54:14,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975859088] [2020-10-13 13:54:14,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:54:14,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:54:14,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:54:14,091 INFO L87 Difference]: Start difference. First operand 1827 states and 3035 transitions. Second operand 4 states. [2020-10-13 13:54:14,276 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:54:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:15,237 INFO L93 Difference]: Finished difference Result 4756 states and 7931 transitions. [2020-10-13 13:54:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:54:15,238 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-13 13:54:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:15,254 INFO L225 Difference]: With dead ends: 4756 [2020-10-13 13:54:15,255 INFO L226 Difference]: Without dead ends: 3014 [2020-10-13 13:54:15,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:54:15,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2020-10-13 13:54:15,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 3012. [2020-10-13 13:54:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3012 states. [2020-10-13 13:54:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 4984 transitions. [2020-10-13 13:54:15,462 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 4984 transitions. Word has length 64 [2020-10-13 13:54:15,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:15,462 INFO L479 AbstractCegarLoop]: Abstraction has 3012 states and 4984 transitions. [2020-10-13 13:54:15,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:54:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 4984 transitions. [2020-10-13 13:54:15,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 13:54:15,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:15,463 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] [2020-10-13 13:54:15,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 13:54:15,464 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:15,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1626764627, now seen corresponding path program 1 times [2020-10-13 13:54:15,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:15,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590271482] [2020-10-13 13:54:15,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:15,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:15,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:15,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:15,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:15,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:17,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:17,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 13:54:17,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:54:17,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1518 [2020-10-13 13:54:17,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:17,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:54:17,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 13:54:17,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 13:54:17,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:17,228 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:54:17,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:17,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:17,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:17,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:17,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:17,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:54:17,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:17,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:17,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:17,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:17,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:54:17,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590271482] [2020-10-13 13:54:17,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:17,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:54:17,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099234418] [2020-10-13 13:54:17,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:54:17,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:17,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:54:17,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:54:17,260 INFO L87 Difference]: Start difference. First operand 3012 states and 4984 transitions. Second operand 5 states. [2020-10-13 13:54:17,447 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:54:18,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:18,522 INFO L93 Difference]: Finished difference Result 11772 states and 19543 transitions. [2020-10-13 13:54:18,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:54:18,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-13 13:54:18,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:18,568 INFO L225 Difference]: With dead ends: 11772 [2020-10-13 13:54:18,569 INFO L226 Difference]: Without dead ends: 8852 [2020-10-13 13:54:18,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:54:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8852 states. [2020-10-13 13:54:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8852 to 5874. [2020-10-13 13:54:19,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5874 states. [2020-10-13 13:54:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5874 states to 5874 states and 9692 transitions. [2020-10-13 13:54:19,136 INFO L78 Accepts]: Start accepts. Automaton has 5874 states and 9692 transitions. Word has length 64 [2020-10-13 13:54:19,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:19,137 INFO L479 AbstractCegarLoop]: Abstraction has 5874 states and 9692 transitions. [2020-10-13 13:54:19,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:54:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 5874 states and 9692 transitions. [2020-10-13 13:54:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 13:54:19,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:19,138 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] [2020-10-13 13:54:19,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 13:54:19,139 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:19,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:19,139 INFO L82 PathProgramCache]: Analyzing trace with hash 623095309, now seen corresponding path program 1 times [2020-10-13 13:54:19,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:19,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884759456] [2020-10-13 13:54:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:19,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:19,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:19,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:19,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:19,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:19,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:20,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:24,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:24,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 13:54:24,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:54:24,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 13:54:24,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:24,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:54:24,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 13:54:24,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 13:54:24,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:24,405 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:54:24,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:24,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:24,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:24,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:24,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:24,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:54:24,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:24,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:24,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:24,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:24,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:54:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:54:24,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884759456] [2020-10-13 13:54:24,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:24,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:54:24,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844211543] [2020-10-13 13:54:24,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:54:24,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:24,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:54:24,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:54:24,456 INFO L87 Difference]: Start difference. First operand 5874 states and 9692 transitions. Second operand 4 states. [2020-10-13 13:54:24,735 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:54:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:26,016 INFO L93 Difference]: Finished difference Result 15366 states and 25342 transitions. [2020-10-13 13:54:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:54:26,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-13 13:54:26,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:26,066 INFO L225 Difference]: With dead ends: 15366 [2020-10-13 13:54:26,067 INFO L226 Difference]: Without dead ends: 9578 [2020-10-13 13:54:26,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:54:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9578 states. [2020-10-13 13:54:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9578 to 9548. [2020-10-13 13:54:26,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9548 states. [2020-10-13 13:54:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9548 states to 9548 states and 15613 transitions. [2020-10-13 13:54:26,896 INFO L78 Accepts]: Start accepts. Automaton has 9548 states and 15613 transitions. Word has length 64 [2020-10-13 13:54:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:26,896 INFO L479 AbstractCegarLoop]: Abstraction has 9548 states and 15613 transitions. [2020-10-13 13:54:26,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:54:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 9548 states and 15613 transitions. [2020-10-13 13:54:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 13:54:26,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:26,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:54:26,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 13:54:26,902 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:26,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:26,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1536924829, now seen corresponding path program 1 times [2020-10-13 13:54:26,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:26,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806572595] [2020-10-13 13:54:26,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:26,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:26,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:27,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:27,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:27,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:27,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:27,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 13:54:27,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:54:27,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-13 13:54:27,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:27,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:54:27,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 13:54:27,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:54:27,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:27,817 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:54:27,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:27,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:27,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:27,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:27,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:27,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:54:27,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:27,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:27,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:27,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:27,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:54:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:54:27,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806572595] [2020-10-13 13:54:27,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:27,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:54:27,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76719374] [2020-10-13 13:54:27,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:54:27,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:27,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:54:27,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:54:27,865 INFO L87 Difference]: Start difference. First operand 9548 states and 15613 transitions. Second operand 4 states. [2020-10-13 13:54:29,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:29,093 INFO L93 Difference]: Finished difference Result 24256 states and 39327 transitions. [2020-10-13 13:54:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:54:29,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-13 13:54:29,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:29,133 INFO L225 Difference]: With dead ends: 24256 [2020-10-13 13:54:29,133 INFO L226 Difference]: Without dead ends: 14766 [2020-10-13 13:54:29,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:54:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14766 states. [2020-10-13 13:54:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14766 to 14764. [2020-10-13 13:54:29,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14764 states. [2020-10-13 13:54:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14764 states to 14764 states and 23309 transitions. [2020-10-13 13:54:29,831 INFO L78 Accepts]: Start accepts. Automaton has 14764 states and 23309 transitions. Word has length 66 [2020-10-13 13:54:29,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:29,831 INFO L479 AbstractCegarLoop]: Abstraction has 14764 states and 23309 transitions. [2020-10-13 13:54:29,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:54:29,832 INFO L276 IsEmpty]: Start isEmpty. Operand 14764 states and 23309 transitions. [2020-10-13 13:54:29,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 13:54:29,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:29,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:54:29,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 13:54:29,836 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:29,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1641363507, now seen corresponding path program 1 times [2020-10-13 13:54:29,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:29,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091853198] [2020-10-13 13:54:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:29,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:29,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:29,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:30,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:30,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:30,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:30,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 13:54:30,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:54:30,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 881 [2020-10-13 13:54:30,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:30,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:54:30,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 13:54:30,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 13:54:30,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:30,941 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:54:30,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:30,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:30,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:30,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:30,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:30,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:54:30,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:30,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:30,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:30,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:30,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:54:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:54:30,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091853198] [2020-10-13 13:54:30,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:30,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:54:30,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110818806] [2020-10-13 13:54:30,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:54:30,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:30,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:54:30,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:54:30,976 INFO L87 Difference]: Start difference. First operand 14764 states and 23309 transitions. Second operand 4 states. [2020-10-13 13:54:31,152 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-13 13:54:32,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:32,314 INFO L93 Difference]: Finished difference Result 31854 states and 50405 transitions. [2020-10-13 13:54:32,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:54:32,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-13 13:54:32,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:32,360 INFO L225 Difference]: With dead ends: 31854 [2020-10-13 13:54:32,360 INFO L226 Difference]: Without dead ends: 17148 [2020-10-13 13:54:32,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:54:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17148 states. [2020-10-13 13:54:33,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17148 to 17146. [2020-10-13 13:54:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17146 states. [2020-10-13 13:54:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17146 states to 17146 states and 26983 transitions. [2020-10-13 13:54:33,234 INFO L78 Accepts]: Start accepts. Automaton has 17146 states and 26983 transitions. Word has length 67 [2020-10-13 13:54:33,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:33,235 INFO L479 AbstractCegarLoop]: Abstraction has 17146 states and 26983 transitions. [2020-10-13 13:54:33,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:54:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 17146 states and 26983 transitions. [2020-10-13 13:54:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 13:54:33,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:33,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:54:33,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 13:54:33,236 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:33,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1425535542, now seen corresponding path program 1 times [2020-10-13 13:54:33,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:33,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112406829] [2020-10-13 13:54:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:33,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:33,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:33,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:33,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:33,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:35,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:35,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 13:54:35,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:54:35,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1814 [2020-10-13 13:54:35,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:35,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:54:35,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 13:54:35,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 13:54:35,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:35,302 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:54:35,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:35,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:35,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:35,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:35,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:35,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:54:35,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:35,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:35,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:35,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:35,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:54:35,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112406829] [2020-10-13 13:54:35,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:35,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:54:35,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281666199] [2020-10-13 13:54:35,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:54:35,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:35,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:54:35,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:54:35,344 INFO L87 Difference]: Start difference. First operand 17146 states and 26983 transitions. Second operand 6 states. [2020-10-13 13:54:35,564 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 13:54:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:37,566 INFO L93 Difference]: Finished difference Result 51060 states and 80505 transitions. [2020-10-13 13:54:37,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:54:37,567 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-13 13:54:37,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:37,647 INFO L225 Difference]: With dead ends: 51060 [2020-10-13 13:54:37,648 INFO L226 Difference]: Without dead ends: 33974 [2020-10-13 13:54:37,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:54:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33974 states. [2020-10-13 13:54:38,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33974 to 17146. [2020-10-13 13:54:38,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17146 states. [2020-10-13 13:54:38,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17146 states to 17146 states and 26891 transitions. [2020-10-13 13:54:38,813 INFO L78 Accepts]: Start accepts. Automaton has 17146 states and 26891 transitions. Word has length 68 [2020-10-13 13:54:38,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:38,813 INFO L479 AbstractCegarLoop]: Abstraction has 17146 states and 26891 transitions. [2020-10-13 13:54:38,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:54:38,814 INFO L276 IsEmpty]: Start isEmpty. Operand 17146 states and 26891 transitions. [2020-10-13 13:54:38,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 13:54:38,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:38,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:54:38,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 13:54:38,814 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:38,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1738168665, now seen corresponding path program 1 times [2020-10-13 13:54:38,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:38,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167822304] [2020-10-13 13:54:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:38,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:38,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:38,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:38,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:39,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:40,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:40,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 13:54:40,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:54:40,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1719 [2020-10-13 13:54:40,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:40,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:54:40,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 13:54:40,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 13:54:40,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:40,765 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:54:40,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:40,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:40,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:40,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:40,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:40,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:54:40,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:40,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:40,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:40,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:40,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:54:40,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167822304] [2020-10-13 13:54:40,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:40,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:54:40,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685161197] [2020-10-13 13:54:40,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:54:40,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:40,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:54:40,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:54:40,798 INFO L87 Difference]: Start difference. First operand 17146 states and 26891 transitions. Second operand 6 states. [2020-10-13 13:54:41,028 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 13:54:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:44,784 INFO L93 Difference]: Finished difference Result 81010 states and 127465 transitions. [2020-10-13 13:54:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:54:44,784 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-13 13:54:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:44,941 INFO L225 Difference]: With dead ends: 81010 [2020-10-13 13:54:44,941 INFO L226 Difference]: Without dead ends: 63924 [2020-10-13 13:54:44,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:54:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63924 states. [2020-10-13 13:54:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63924 to 31810. [2020-10-13 13:54:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31810 states. [2020-10-13 13:54:47,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31810 states to 31810 states and 49711 transitions. [2020-10-13 13:54:47,170 INFO L78 Accepts]: Start accepts. Automaton has 31810 states and 49711 transitions. Word has length 71 [2020-10-13 13:54:47,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:47,170 INFO L479 AbstractCegarLoop]: Abstraction has 31810 states and 49711 transitions. [2020-10-13 13:54:47,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:54:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand 31810 states and 49711 transitions. [2020-10-13 13:54:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 13:54:47,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:47,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:54:47,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 13:54:47,172 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:47,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1953255533, now seen corresponding path program 1 times [2020-10-13 13:54:47,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:47,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105690973] [2020-10-13 13:54:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:47,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:47,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:47,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:47,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:48,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:49,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:49,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 13:54:49,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:54:49,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2610 [2020-10-13 13:54:49,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:49,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:54:49,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-13 13:54:49,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:54:49,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:49,996 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:54:49,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:54:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:50,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:50,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:54:50,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:54:50,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:54:50,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:54:50,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:54:50,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:54:50,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:54:50,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:54:50,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:54:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:54:50,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105690973] [2020-10-13 13:54:50,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:54:50,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:54:50,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428857721] [2020-10-13 13:54:50,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:54:50,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:54:50,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:54:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:54:50,018 INFO L87 Difference]: Start difference. First operand 31810 states and 49711 transitions. Second operand 5 states. [2020-10-13 13:54:52,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:54:52,923 INFO L93 Difference]: Finished difference Result 44655 states and 69095 transitions. [2020-10-13 13:54:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:54:52,923 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-13 13:54:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:54:53,052 INFO L225 Difference]: With dead ends: 44655 [2020-10-13 13:54:53,052 INFO L226 Difference]: Without dead ends: 44653 [2020-10-13 13:54:53,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:54:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44653 states. [2020-10-13 13:54:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44653 to 32146. [2020-10-13 13:54:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32146 states. [2020-10-13 13:54:55,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32146 states to 32146 states and 50027 transitions. [2020-10-13 13:54:55,105 INFO L78 Accepts]: Start accepts. Automaton has 32146 states and 50027 transitions. Word has length 72 [2020-10-13 13:54:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:54:55,105 INFO L479 AbstractCegarLoop]: Abstraction has 32146 states and 50027 transitions. [2020-10-13 13:54:55,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:54:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 32146 states and 50027 transitions. [2020-10-13 13:54:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 13:54:55,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:54:55,108 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:54:55,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 13:54:55,109 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:54:55,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:54:55,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1966376265, now seen corresponding path program 1 times [2020-10-13 13:54:55,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:54:55,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151874562] [2020-10-13 13:54:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:54:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:54:55,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:55,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:55,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:55,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:55,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:55,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:55,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:55,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:54:55,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:00,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:00,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 13:55:00,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 13:55:00,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:55:00,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:00,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:55:00,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 13:55:00,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 13:55:00,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:00,311 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:55:00,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:00,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:00,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:00,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:00,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:00,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:55:00,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:00,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:00,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:00,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:00,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:55:00,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151874562] [2020-10-13 13:55:00,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:00,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:55:00,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315247524] [2020-10-13 13:55:00,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:55:00,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:00,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:55:00,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:00,336 INFO L87 Difference]: Start difference. First operand 32146 states and 50027 transitions. Second operand 4 states. [2020-10-13 13:55:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:03,038 INFO L93 Difference]: Finished difference Result 64234 states and 99977 transitions. [2020-10-13 13:55:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:55:03,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-13 13:55:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:03,091 INFO L225 Difference]: With dead ends: 64234 [2020-10-13 13:55:03,091 INFO L226 Difference]: Without dead ends: 32148 [2020-10-13 13:55:03,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32148 states. [2020-10-13 13:55:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32148 to 32146. [2020-10-13 13:55:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32146 states. [2020-10-13 13:55:05,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32146 states to 32146 states and 49625 transitions. [2020-10-13 13:55:05,185 INFO L78 Accepts]: Start accepts. Automaton has 32146 states and 49625 transitions. Word has length 89 [2020-10-13 13:55:05,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:05,186 INFO L479 AbstractCegarLoop]: Abstraction has 32146 states and 49625 transitions. [2020-10-13 13:55:05,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:55:05,186 INFO L276 IsEmpty]: Start isEmpty. Operand 32146 states and 49625 transitions. [2020-10-13 13:55:05,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 13:55:05,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:05,188 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:05,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 13:55:05,188 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash -289256817, now seen corresponding path program 1 times [2020-10-13 13:55:05,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:05,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815348226] [2020-10-13 13:55:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:05,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:05,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:05,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:05,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:05,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:05,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:05,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:05,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:06,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:06,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:10,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:10,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 13:55:10,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:55:10,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 13:55:10,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:10,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:55:10,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 13:55:10,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 13:55:10,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:10,398 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:55:10,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:10,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:10,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:10,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:10,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:10,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:55:10,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:10,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:10,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:10,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:10,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 13:55:10,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815348226] [2020-10-13 13:55:10,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:10,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:55:10,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155048144] [2020-10-13 13:55:10,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:55:10,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:10,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:55:10,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:10,429 INFO L87 Difference]: Start difference. First operand 32146 states and 49625 transitions. Second operand 4 states. [2020-10-13 13:55:10,613 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-13 13:55:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:12,963 INFO L93 Difference]: Finished difference Result 64310 states and 99283 transitions. [2020-10-13 13:55:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:55:12,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-10-13 13:55:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:13,026 INFO L225 Difference]: With dead ends: 64310 [2020-10-13 13:55:13,026 INFO L226 Difference]: Without dead ends: 32224 [2020-10-13 13:55:13,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:13,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32224 states. [2020-10-13 13:55:14,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32224 to 32160. [2020-10-13 13:55:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32160 states. [2020-10-13 13:55:14,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32160 states to 32160 states and 49645 transitions. [2020-10-13 13:55:14,991 INFO L78 Accepts]: Start accepts. Automaton has 32160 states and 49645 transitions. Word has length 91 [2020-10-13 13:55:14,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:14,992 INFO L479 AbstractCegarLoop]: Abstraction has 32160 states and 49645 transitions. [2020-10-13 13:55:14,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:55:14,992 INFO L276 IsEmpty]: Start isEmpty. Operand 32160 states and 49645 transitions. [2020-10-13 13:55:14,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 13:55:14,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:14,994 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:14,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 13:55:14,995 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:14,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:14,995 INFO L82 PathProgramCache]: Analyzing trace with hash 761499170, now seen corresponding path program 1 times [2020-10-13 13:55:14,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:14,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127831951] [2020-10-13 13:55:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:15,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:15,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:15,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:15,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:15,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:15,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:17,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:17,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:17,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:17,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:20,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:20,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 13:55:20,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:55:20,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 13:55:20,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:55:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 13:55:20,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 13:55:20,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:55:20,297 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:55:20,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:20,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:20,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:20,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:20,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:20,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:55:20,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:20,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:20,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:20,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:55:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 13:55:20,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127831951] [2020-10-13 13:55:20,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:20,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:55:20,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662912726] [2020-10-13 13:55:20,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:55:20,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:20,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:55:20,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:20,342 INFO L87 Difference]: Start difference. First operand 32160 states and 49645 transitions. Second operand 4 states. [2020-10-13 13:55:20,522 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-13 13:55:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:23,246 INFO L93 Difference]: Finished difference Result 72488 states and 111811 transitions. [2020-10-13 13:55:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:55:23,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-13 13:55:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:23,320 INFO L225 Difference]: With dead ends: 72488 [2020-10-13 13:55:23,320 INFO L226 Difference]: Without dead ends: 40402 [2020-10-13 13:55:23,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40402 states. [2020-10-13 13:55:25,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40402 to 40400. [2020-10-13 13:55:25,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40400 states. [2020-10-13 13:55:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40400 states to 40400 states and 62069 transitions. [2020-10-13 13:55:25,860 INFO L78 Accepts]: Start accepts. Automaton has 40400 states and 62069 transitions. Word has length 93 [2020-10-13 13:55:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:25,860 INFO L479 AbstractCegarLoop]: Abstraction has 40400 states and 62069 transitions. [2020-10-13 13:55:25,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:55:25,861 INFO L276 IsEmpty]: Start isEmpty. Operand 40400 states and 62069 transitions. [2020-10-13 13:55:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 13:55:25,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:25,863 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:25,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 13:55:25,863 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:25,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:25,864 INFO L82 PathProgramCache]: Analyzing trace with hash 23566461, now seen corresponding path program 1 times [2020-10-13 13:55:25,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:25,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34188000] [2020-10-13 13:55:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:25,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:25,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:25,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:25,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:26,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:26,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:26,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:27,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:27,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:27,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:27,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:28,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:31,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:31,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 13:55:31,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 13:55:31,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5917 [2020-10-13 13:55:31,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:31,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:55:31,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:55:31,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 13:55:31,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:32,002 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:55:32,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:32,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:32,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:32,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:32,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:32,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:55:32,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:32,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:32,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:32,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:32,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 13:55:32,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34188000] [2020-10-13 13:55:32,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:32,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:55:32,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586987248] [2020-10-13 13:55:32,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:55:32,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:32,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:55:32,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:32,037 INFO L87 Difference]: Start difference. First operand 40400 states and 62069 transitions. Second operand 5 states. [2020-10-13 13:55:37,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:37,697 INFO L93 Difference]: Finished difference Result 119162 states and 182902 transitions. [2020-10-13 13:55:37,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:55:37,697 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 97 [2020-10-13 13:55:37,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:37,848 INFO L225 Difference]: With dead ends: 119162 [2020-10-13 13:55:37,849 INFO L226 Difference]: Without dead ends: 78775 [2020-10-13 13:55:37,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:55:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78775 states. [2020-10-13 13:55:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78775 to 78773. [2020-10-13 13:55:43,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78773 states. [2020-10-13 13:55:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78773 states to 78773 states and 119971 transitions. [2020-10-13 13:55:43,343 INFO L78 Accepts]: Start accepts. Automaton has 78773 states and 119971 transitions. Word has length 97 [2020-10-13 13:55:43,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:43,343 INFO L479 AbstractCegarLoop]: Abstraction has 78773 states and 119971 transitions. [2020-10-13 13:55:43,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:55:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 78773 states and 119971 transitions. [2020-10-13 13:55:43,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 13:55:43,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:43,347 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:43,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 13:55:43,347 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:43,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:43,348 INFO L82 PathProgramCache]: Analyzing trace with hash -990714027, now seen corresponding path program 1 times [2020-10-13 13:55:43,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:43,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576632283] [2020-10-13 13:55:43,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:43,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:43,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:43,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:43,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:43,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:43,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:44,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:46,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:46,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:47,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:48,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:48,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 13:55:48,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:55:48,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 13:55:48,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:48,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:55:48,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:55:48,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:55:48,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:48,543 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:55:48,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:48,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:48,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:48,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:48,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:48,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:55:48,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:48,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 13:55:48,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576632283] [2020-10-13 13:55:48,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:48,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:55:48,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379567628] [2020-10-13 13:55:48,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:55:48,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:48,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:55:48,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:48,569 INFO L87 Difference]: Start difference. First operand 78773 states and 119971 transitions. Second operand 4 states. [2020-10-13 13:55:58,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:58,954 INFO L93 Difference]: Finished difference Result 236273 states and 359843 transitions. [2020-10-13 13:55:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:55:58,954 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-13 13:55:58,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:59,418 INFO L225 Difference]: With dead ends: 236273 [2020-10-13 13:55:59,418 INFO L226 Difference]: Without dead ends: 157532 [2020-10-13 13:55:59,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157532 states. [2020-10-13 13:56:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157532 to 78775. [2020-10-13 13:56:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78775 states. [2020-10-13 13:56:07,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78775 states to 78775 states and 119973 transitions. [2020-10-13 13:56:07,733 INFO L78 Accepts]: Start accepts. Automaton has 78775 states and 119973 transitions. Word has length 98 [2020-10-13 13:56:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:07,733 INFO L479 AbstractCegarLoop]: Abstraction has 78775 states and 119973 transitions. [2020-10-13 13:56:07,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:56:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 78775 states and 119973 transitions. [2020-10-13 13:56:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 13:56:07,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:07,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:56:07,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 13:56:07,738 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:07,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:07,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2046176548, now seen corresponding path program 1 times [2020-10-13 13:56:07,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:07,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370459100] [2020-10-13 13:56:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:07,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:07,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:07,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:07,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:07,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:07,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:07,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:08,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:12,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:12,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 13:56:12,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 13:56:12,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 13:56:12,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:12,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:56:12,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 13:56:12,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 13:56:12,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:12,991 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:56:12,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:56:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:12,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:13,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:13,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:56:13,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:56:13,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:56:13,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:13,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:56:13,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:56:13,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:56:13,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 13:56:13,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370459100] [2020-10-13 13:56:13,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:56:13,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:56:13,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534027196] [2020-10-13 13:56:13,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:56:13,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:56:13,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:56:13,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:56:13,016 INFO L87 Difference]: Start difference. First operand 78775 states and 119973 transitions. Second operand 5 states. [2020-10-13 13:56:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:19,290 INFO L93 Difference]: Finished difference Result 157532 states and 239921 transitions. [2020-10-13 13:56:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:56:19,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-13 13:56:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:19,401 INFO L225 Difference]: With dead ends: 157532 [2020-10-13 13:56:19,401 INFO L226 Difference]: Without dead ends: 78775 [2020-10-13 13:56:19,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:56:19,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78775 states. [2020-10-13 13:56:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78775 to 78774. [2020-10-13 13:56:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78774 states. [2020-10-13 13:56:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78774 states to 78774 states and 119970 transitions. [2020-10-13 13:56:27,160 INFO L78 Accepts]: Start accepts. Automaton has 78774 states and 119970 transitions. Word has length 99 [2020-10-13 13:56:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:27,160 INFO L479 AbstractCegarLoop]: Abstraction has 78774 states and 119970 transitions. [2020-10-13 13:56:27,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:56:27,161 INFO L276 IsEmpty]: Start isEmpty. Operand 78774 states and 119970 transitions. [2020-10-13 13:56:27,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 13:56:27,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:27,165 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:56:27,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 13:56:27,165 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:27,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:27,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1194661056, now seen corresponding path program 1 times [2020-10-13 13:56:27,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:27,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447929591] [2020-10-13 13:56:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:27,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:27,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:27,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:27,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:27,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:27,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:27,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:27,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:27,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:28,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:32,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:32,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 13:56:32,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:56:32,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 13:56:32,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:56:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:56:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:56:32,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:32,406 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:56:32,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:56:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:32,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:32,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:32,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:56:32,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:56:32,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:56:32,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:32,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:56:32,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:56:32,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:56:32,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 13:56:32,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447929591] [2020-10-13 13:56:32,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:56:32,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:56:32,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560582060] [2020-10-13 13:56:32,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:56:32,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:56:32,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:56:32,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:56:32,440 INFO L87 Difference]: Start difference. First operand 78774 states and 119970 transitions. Second operand 5 states. [2020-10-13 13:56:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:45,561 INFO L93 Difference]: Finished difference Result 236264 states and 359822 transitions. [2020-10-13 13:56:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:56:45,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-13 13:56:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:45,811 INFO L225 Difference]: With dead ends: 236264 [2020-10-13 13:56:45,811 INFO L226 Difference]: Without dead ends: 157529 [2020-10-13 13:56:45,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:56:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157529 states. [2020-10-13 13:56:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157529 to 78804. [2020-10-13 13:56:55,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78804 states. [2020-10-13 13:56:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78804 states to 78804 states and 120015 transitions. [2020-10-13 13:56:55,578 INFO L78 Accepts]: Start accepts. Automaton has 78804 states and 120015 transitions. Word has length 99 [2020-10-13 13:56:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:55,579 INFO L479 AbstractCegarLoop]: Abstraction has 78804 states and 120015 transitions. [2020-10-13 13:56:55,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:56:55,579 INFO L276 IsEmpty]: Start isEmpty. Operand 78804 states and 120015 transitions. [2020-10-13 13:56:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 13:56:55,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:55,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:56:55,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 13:56:55,583 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:55,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:55,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1716211965, now seen corresponding path program 1 times [2020-10-13 13:56:55,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:55,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760490136] [2020-10-13 13:56:55,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:55,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:55,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:55,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:55,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:55,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:55,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:56,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:56,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:57,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:57,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:57,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:00,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:00,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:00,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:00,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:00,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:00,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:00,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:00,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 13:57:00,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 13:57:00,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 13:57:00,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:00,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:57:00,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:57:00,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 13:57:00,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:00,839 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:57:00,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:57:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:00,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:00,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:00,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:57:00,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:57:00,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:57:00,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:00,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:57:00,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:57:00,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:57:00,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 13:57:00,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760490136] [2020-10-13 13:57:00,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:57:00,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:57:00,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852854848] [2020-10-13 13:57:00,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:57:00,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:57:00,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:57:00,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:57:00,868 INFO L87 Difference]: Start difference. First operand 78804 states and 120015 transitions. Second operand 5 states. [2020-10-13 13:57:12,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:57:12,983 INFO L93 Difference]: Finished difference Result 196028 states and 298044 transitions. [2020-10-13 13:57:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:57:12,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-13 13:57:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:57:13,160 INFO L225 Difference]: With dead ends: 196028 [2020-10-13 13:57:13,160 INFO L226 Difference]: Without dead ends: 117277 [2020-10-13 13:57:13,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:57:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117277 states. [2020-10-13 13:57:27,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117277 to 117275. [2020-10-13 13:57:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117275 states. [2020-10-13 13:57:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117275 states to 117275 states and 176545 transitions. [2020-10-13 13:57:28,129 INFO L78 Accepts]: Start accepts. Automaton has 117275 states and 176545 transitions. Word has length 99 [2020-10-13 13:57:28,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:57:28,130 INFO L479 AbstractCegarLoop]: Abstraction has 117275 states and 176545 transitions. [2020-10-13 13:57:28,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:57:28,130 INFO L276 IsEmpty]: Start isEmpty. Operand 117275 states and 176545 transitions. [2020-10-13 13:57:28,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 13:57:28,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:57:28,134 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:57:28,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 13:57:28,135 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:57:28,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:57:28,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1196392842, now seen corresponding path program 1 times [2020-10-13 13:57:28,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:57:28,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200861030] [2020-10-13 13:57:28,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:57:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:28,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:28,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:28,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:28,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:28,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:28,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:29,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:29,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:29,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:29,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:30,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking...