/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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 13:47:48,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 13:47:48,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 13:47:48,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 13:47:48,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 13:47:48,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 13:47:48,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 13:47:48,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 13:47:48,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 13:47:48,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 13:47:48,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 13:47:48,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 13:47:48,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 13:47:48,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 13:47:48,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 13:47:48,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 13:47:48,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 13:47:48,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 13:47:48,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 13:47:48,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 13:47:48,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 13:47:48,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 13:47:48,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 13:47:48,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 13:47:48,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 13:47:48,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 13:47:48,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 13:47:48,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 13:47:48,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 13:47:48,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 13:47:48,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 13:47:48,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 13:47:48,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 13:47:48,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 13:47:48,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 13:47:48,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 13:47:48,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 13:47:48,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 13:47:48,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 13:47:48,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 13:47:48,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 13:47:48,334 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 13:47:48,371 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 13:47:48,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 13:47:48,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 13:47:48,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 13:47:48,374 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 13:47:48,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 13:47:48,374 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 13:47:48,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 13:47:48,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 13:47:48,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 13:47:48,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 13:47:48,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 13:47:48,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 13:47:48,376 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 13:47:48,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 13:47:48,377 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 13:47:48,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 13:47:48,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 13:47:48,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 13:47:48,377 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 13:47:48,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 13:47:48,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:47:48,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 13:47:48,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 13:47:48,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 13:47:48,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 13:47:48,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 13:47:48,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 13:47:48,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 13:47:48,379 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 13:47:48,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 13:47:48,656 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 13:47:48,659 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 13:47:48,661 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 13:47:48,661 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 13:47:48,662 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 13:47:48,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7fd781396/1791ebd19c444a7299fae1e0d1bb7519/FLAGf051b1a9c [2020-10-13 13:47:49,233 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 13:47:49,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 13:47:49,246 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7fd781396/1791ebd19c444a7299fae1e0d1bb7519/FLAGf051b1a9c [2020-10-13 13:47:49,539 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7fd781396/1791ebd19c444a7299fae1e0d1bb7519 [2020-10-13 13:47:49,547 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 13:47:49,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 13:47:49,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 13:47:49,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 13:47:49,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 13:47:49,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:47:49" (1/1) ... [2020-10-13 13:47:49,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a35e781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:47:49, skipping insertion in model container [2020-10-13 13:47:49,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:47:49" (1/1) ... [2020-10-13 13:47:49,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 13:47:49,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 13:47:49,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:47:50,011 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 13:47:50,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:47:50,199 INFO L208 MainTranslator]: Completed translation [2020-10-13 13:47:50,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:47:50 WrapperNode [2020-10-13 13:47:50,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 13:47:50,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 13:47:50,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 13:47:50,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 13:47:50,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:47:50" (1/1) ... [2020-10-13 13:47:50,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:47:50" (1/1) ... [2020-10-13 13:47:50,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:47:50" (1/1) ... [2020-10-13 13:47:50,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:47:50" (1/1) ... [2020-10-13 13:47:50,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:47:50" (1/1) ... [2020-10-13 13:47:50,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:47:50" (1/1) ... [2020-10-13 13:47:50,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:47:50" (1/1) ... [2020-10-13 13:47:50,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 13:47:50,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 13:47:50,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 13:47:50,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 13:47:50,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:47:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:47:50,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 13:47:50,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 13:47:50,323 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 13:47:50,323 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 13:47:50,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 13:47:50,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 13:47:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 13:47:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 13:47:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 13:47:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 13:47:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 13:47:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 13:47:50,325 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 13:47:50,325 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 13:47:50,325 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 13:47:50,325 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 13:47:50,325 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 13:47:50,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 13:47:50,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 13:47:50,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 13:47:51,012 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 13:47:51,012 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 13:47:51,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:47:51 BoogieIcfgContainer [2020-10-13 13:47:51,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 13:47:51,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 13:47:51,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 13:47:51,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 13:47:51,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:47:49" (1/3) ... [2020-10-13 13:47:51,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1fced4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:47:51, skipping insertion in model container [2020-10-13 13:47:51,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:47:50" (2/3) ... [2020-10-13 13:47:51,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1fced4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:47:51, skipping insertion in model container [2020-10-13 13:47:51,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:47:51" (3/3) ... [2020-10-13 13:47:51,025 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 13:47:51,035 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 13:47:51,042 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 13:47:51,056 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 13:47:51,079 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 13:47:51,080 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 13:47:51,080 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 13:47:51,080 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 13:47:51,080 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 13:47:51,080 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 13:47:51,080 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 13:47:51,080 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 13:47:51,099 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states. [2020-10-13 13:47:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 13:47:51,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:47:51,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:47:51,109 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:47:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:47:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash 934723091, now seen corresponding path program 1 times [2020-10-13 13:47:51,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:47:51,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545913555] [2020-10-13 13:47:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:47:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:47:51,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:47:51,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:47:51,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:47:52,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:47:53,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:47:53,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 13:47:53,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:47:53,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1817 [2020-10-13 13:47:53,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:47:53,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:47:53,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 13:47:53,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 13:47:53,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 13:47:53,528 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:47:53,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:47:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:47:53,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:47:53,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:47:53,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:47:53,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:47:53,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 13:47:53,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:47:53,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:47:53,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:47:53,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:47:53,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:47:53,577 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 13:47:53,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545913555] [2020-10-13 13:47:53,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:47:53,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:47:53,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686191744] [2020-10-13 13:47:53,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:47:53,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:47:53,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:47:53,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:47:53,605 INFO L87 Difference]: Start difference. First operand 134 states. Second operand 4 states. [2020-10-13 13:47:53,839 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-13 13:47:54,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:47:54,465 INFO L93 Difference]: Finished difference Result 289 states and 486 transitions. [2020-10-13 13:47:54,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:47:54,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-13 13:47:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:47:54,482 INFO L225 Difference]: With dead ends: 289 [2020-10-13 13:47:54,482 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 13:47:54,486 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 13:47:54,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 13:47:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2020-10-13 13:47:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-13 13:47:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 311 transitions. [2020-10-13 13:47:54,546 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 311 transitions. Word has length 55 [2020-10-13 13:47:54,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:47:54,547 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 311 transitions. [2020-10-13 13:47:54,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:47:54,547 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 311 transitions. [2020-10-13 13:47:54,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 13:47:54,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:47:54,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:47:54,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 13:47:54,552 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:47:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:47:54,552 INFO L82 PathProgramCache]: Analyzing trace with hash 188508512, now seen corresponding path program 1 times [2020-10-13 13:47:54,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:47:54,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315776444] [2020-10-13 13:47:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:47:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:47:54,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:47:54,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:47:54,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:47:54,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:47:55,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:47:58,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:47:58,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 13:47:58,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:47:58,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3958 [2020-10-13 13:47:58,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:47:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:47:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 13:47:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 13:47:58,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:47:58,793 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:47:58,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:47:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:47:58,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:47:58,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:47:58,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:47:58,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:47:58,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 13:47:58,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:47:58,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:47:58,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:47:58,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:47:58,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:47:58,834 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 13:47:58,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315776444] [2020-10-13 13:47:58,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:47:58,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:47:58,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099291101] [2020-10-13 13:47:58,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:47:58,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:47:58,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:47:58,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:47:58,838 INFO L87 Difference]: Start difference. First operand 197 states and 311 transitions. Second operand 4 states. [2020-10-13 13:47:59,015 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-13 13:47:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:47:59,694 INFO L93 Difference]: Finished difference Result 473 states and 767 transitions. [2020-10-13 13:47:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:47:59,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-13 13:47:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:47:59,703 INFO L225 Difference]: With dead ends: 473 [2020-10-13 13:47:59,703 INFO L226 Difference]: Without dead ends: 328 [2020-10-13 13:47:59,705 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 13:47:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-13 13:47:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 326. [2020-10-13 13:47:59,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-13 13:47:59,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 523 transitions. [2020-10-13 13:47:59,763 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 523 transitions. Word has length 57 [2020-10-13 13:47:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:47:59,763 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 523 transitions. [2020-10-13 13:47:59,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:47:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 523 transitions. [2020-10-13 13:47:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 13:47:59,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:47:59,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:47:59,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 13:47:59,770 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:47:59,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:47:59,771 INFO L82 PathProgramCache]: Analyzing trace with hash -478800568, now seen corresponding path program 1 times [2020-10-13 13:47:59,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:47:59,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579042167] [2020-10-13 13:47:59,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:47:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:47:59,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:47:59,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:47:59,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:47:59,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:00,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:00,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:01,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:04,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:04,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 13:48:04,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:48:04,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 13:48:04,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:04,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:48:04,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 13:48:04,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 13:48:04,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:48:05,022 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:48:05,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:48:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:05,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:05,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:05,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:48:05,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:48:05,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:48:05,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:05,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:48:05,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:48:05,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:48:05,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:48:05,059 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 13:48:05,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579042167] [2020-10-13 13:48:05,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:48:05,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:48:05,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107480131] [2020-10-13 13:48:05,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:48:05,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:48:05,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:48:05,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:48:05,063 INFO L87 Difference]: Start difference. First operand 326 states and 523 transitions. Second operand 4 states. [2020-10-13 13:48:05,276 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:48:05,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:48:05,908 INFO L93 Difference]: Finished difference Result 601 states and 979 transitions. [2020-10-13 13:48:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:48:05,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-13 13:48:05,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:48:05,914 INFO L225 Difference]: With dead ends: 601 [2020-10-13 13:48:05,914 INFO L226 Difference]: Without dead ends: 456 [2020-10-13 13:48:05,918 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 13:48:05,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-13 13:48:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 454. [2020-10-13 13:48:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-10-13 13:48:05,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 733 transitions. [2020-10-13 13:48:05,956 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 733 transitions. Word has length 59 [2020-10-13 13:48:05,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:48:05,959 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 733 transitions. [2020-10-13 13:48:05,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:48:05,959 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 733 transitions. [2020-10-13 13:48:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 13:48:05,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:48:05,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:48:05,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 13:48:05,968 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:48:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:48:05,968 INFO L82 PathProgramCache]: Analyzing trace with hash 458533235, now seen corresponding path program 1 times [2020-10-13 13:48:05,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:48:05,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259021542] [2020-10-13 13:48:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:48:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:06,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:06,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:06,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:06,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:06,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:07,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:11,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:11,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 13:48:11,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:48:11,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 13:48:11,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:11,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:48:11,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 13:48:11,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 13:48:11,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:48:11,217 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:48:11,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:48:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:11,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:11,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:11,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:48:11,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:48:11,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:48:11,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:11,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:48:11,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:48:11,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:48:11,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:48:11,246 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 13:48:11,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259021542] [2020-10-13 13:48:11,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:48:11,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:48:11,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749011510] [2020-10-13 13:48:11,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:48:11,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:48:11,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:48:11,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:48:11,248 INFO L87 Difference]: Start difference. First operand 454 states and 733 transitions. Second operand 6 states. [2020-10-13 13:48:11,462 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 13:48:12,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:48:12,213 INFO L93 Difference]: Finished difference Result 2102 states and 3488 transitions. [2020-10-13 13:48:12,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:48:12,214 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-13 13:48:12,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:48:12,227 INFO L225 Difference]: With dead ends: 2102 [2020-10-13 13:48:12,227 INFO L226 Difference]: Without dead ends: 1723 [2020-10-13 13:48:12,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:48:12,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2020-10-13 13:48:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 821. [2020-10-13 13:48:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-10-13 13:48:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1337 transitions. [2020-10-13 13:48:12,293 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1337 transitions. Word has length 59 [2020-10-13 13:48:12,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:48:12,295 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1337 transitions. [2020-10-13 13:48:12,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:48:12,295 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1337 transitions. [2020-10-13 13:48:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 13:48:12,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:48:12,297 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] [2020-10-13 13:48:12,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 13:48:12,297 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:48:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:48:12,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1268017915, now seen corresponding path program 1 times [2020-10-13 13:48:12,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:48:12,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923468465] [2020-10-13 13:48:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:48:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:12,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:12,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:12,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:12,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:12,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:12,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:15,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:17,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:17,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 13:48:17,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:48:17,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 13:48:17,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:48:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 13:48:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 13:48:17,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:48:17,575 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:48:17,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:48:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:17,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:17,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:17,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:48:17,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:48:17,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:48:17,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:48:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:48:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:48:17,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:48:17,612 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 13:48:17,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923468465] [2020-10-13 13:48:17,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:48:17,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 13:48:17,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871020330] [2020-10-13 13:48:17,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 13:48:17,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:48:17,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 13:48:17,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:48:17,618 INFO L87 Difference]: Start difference. First operand 821 states and 1337 transitions. Second operand 7 states. [2020-10-13 13:48:17,845 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-13 13:48:18,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:48:18,933 INFO L93 Difference]: Finished difference Result 4467 states and 7350 transitions. [2020-10-13 13:48:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 13:48:18,934 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-10-13 13:48:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:48:18,955 INFO L225 Difference]: With dead ends: 4467 [2020-10-13 13:48:18,955 INFO L226 Difference]: Without dead ends: 3723 [2020-10-13 13:48:18,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-13 13:48:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2020-10-13 13:48:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 2258. [2020-10-13 13:48:19,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2258 states. [2020-10-13 13:48:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 3682 transitions. [2020-10-13 13:48:19,182 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 3682 transitions. Word has length 60 [2020-10-13 13:48:19,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:48:19,184 INFO L479 AbstractCegarLoop]: Abstraction has 2258 states and 3682 transitions. [2020-10-13 13:48:19,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 13:48:19,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 3682 transitions. [2020-10-13 13:48:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 13:48:19,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:48:19,186 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] [2020-10-13 13:48:19,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 13:48:19,192 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:48:19,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:48:19,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1596147057, now seen corresponding path program 1 times [2020-10-13 13:48:19,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:48:19,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444703950] [2020-10-13 13:48:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:48:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:19,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:19,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:19,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:19,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:19,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:20,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:20,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:21,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:24,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:24,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 13:48:24,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 13:48:24,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 13:48:24,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:24,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:48:24,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 13:48:24,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 13:48:24,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:48:24,411 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:48:24,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:48:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:24,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:24,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:24,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:48:24,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:48:24,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:48:24,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:24,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:48:24,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:48:24,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:48:24,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:48:24,451 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 13:48:24,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444703950] [2020-10-13 13:48:24,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:48:24,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:48:24,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623117433] [2020-10-13 13:48:24,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:48:24,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:48:24,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:48:24,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:48:24,457 INFO L87 Difference]: Start difference. First operand 2258 states and 3682 transitions. Second operand 4 states. [2020-10-13 13:48:24,721 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:48:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:48:25,757 INFO L93 Difference]: Finished difference Result 4496 states and 7412 transitions. [2020-10-13 13:48:25,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:48:25,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-13 13:48:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:48:25,775 INFO L225 Difference]: With dead ends: 4496 [2020-10-13 13:48:25,775 INFO L226 Difference]: Without dead ends: 3151 [2020-10-13 13:48:25,778 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 13:48:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2020-10-13 13:48:25,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 3149. [2020-10-13 13:48:25,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3149 states. [2020-10-13 13:48:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 5147 transitions. [2020-10-13 13:48:25,992 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 5147 transitions. Word has length 60 [2020-10-13 13:48:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:48:25,994 INFO L479 AbstractCegarLoop]: Abstraction has 3149 states and 5147 transitions. [2020-10-13 13:48:25,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:48:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 5147 transitions. [2020-10-13 13:48:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 13:48:25,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:48:25,995 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 13:48:25,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 13:48:25,995 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:48:25,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:48:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash 596797242, now seen corresponding path program 1 times [2020-10-13 13:48:25,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:48:25,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440327293] [2020-10-13 13:48:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:48:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:26,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:26,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:26,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:26,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:26,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:27,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:27,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:30,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:30,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 13:48:30,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:48:30,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4877 [2020-10-13 13:48:30,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:30,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:48:30,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 13:48:30,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 13:48:30,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:48:31,071 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:48:31,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:48:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:31,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:31,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:31,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:48:31,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:48:31,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:48:31,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:31,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:48:31,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:48:31,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:48:31,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:48:31,098 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 13:48:31,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440327293] [2020-10-13 13:48:31,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:48:31,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:48:31,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414550818] [2020-10-13 13:48:31,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:48:31,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:48:31,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:48:31,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:48:31,101 INFO L87 Difference]: Start difference. First operand 3149 states and 5147 transitions. Second operand 4 states. [2020-10-13 13:48:31,292 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-13 13:48:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:48:32,062 INFO L93 Difference]: Finished difference Result 8444 states and 13773 transitions. [2020-10-13 13:48:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:48:32,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-13 13:48:32,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:48:32,090 INFO L225 Difference]: With dead ends: 8444 [2020-10-13 13:48:32,090 INFO L226 Difference]: Without dead ends: 5532 [2020-10-13 13:48:32,103 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 13:48:32,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2020-10-13 13:48:32,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 5530. [2020-10-13 13:48:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5530 states. [2020-10-13 13:48:32,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5530 states to 5530 states and 8941 transitions. [2020-10-13 13:48:32,430 INFO L78 Accepts]: Start accepts. Automaton has 5530 states and 8941 transitions. Word has length 61 [2020-10-13 13:48:32,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:48:32,431 INFO L479 AbstractCegarLoop]: Abstraction has 5530 states and 8941 transitions. [2020-10-13 13:48:32,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:48:32,431 INFO L276 IsEmpty]: Start isEmpty. Operand 5530 states and 8941 transitions. [2020-10-13 13:48:32,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 13:48:32,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:48:32,432 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 13:48:32,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 13:48:32,433 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:48:32,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:48:32,433 INFO L82 PathProgramCache]: Analyzing trace with hash 264681564, now seen corresponding path program 1 times [2020-10-13 13:48:32,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:48:32,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160781876] [2020-10-13 13:48:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:48:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:32,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:32,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:32,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:32,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:32,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:32,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:32,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:32,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:34,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:37,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:37,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 13:48:37,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 13:48:37,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 13:48:37,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:37,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:48:37,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 13:48:37,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:48:37,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:48:37,629 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:48:37,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:48:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:37,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:37,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:37,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:48:37,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:48:37,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:48:37,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:37,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:48:37,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:48:37,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:48:37,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:48:37,655 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 13:48:37,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160781876] [2020-10-13 13:48:37,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:48:37,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:48:37,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508786612] [2020-10-13 13:48:37,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:48:37,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:48:37,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:48:37,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:48:37,658 INFO L87 Difference]: Start difference. First operand 5530 states and 8941 transitions. Second operand 4 states. [2020-10-13 13:48:37,849 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:48:38,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:48:38,697 INFO L93 Difference]: Finished difference Result 10328 states and 16773 transitions. [2020-10-13 13:48:38,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:48:38,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-13 13:48:38,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:48:38,733 INFO L225 Difference]: With dead ends: 10328 [2020-10-13 13:48:38,733 INFO L226 Difference]: Without dead ends: 7259 [2020-10-13 13:48:38,742 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 13:48:38,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7259 states. [2020-10-13 13:48:39,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7259 to 7257. [2020-10-13 13:48:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7257 states. [2020-10-13 13:48:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7257 states to 7257 states and 11681 transitions. [2020-10-13 13:48:39,158 INFO L78 Accepts]: Start accepts. Automaton has 7257 states and 11681 transitions. Word has length 62 [2020-10-13 13:48:39,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:48:39,159 INFO L479 AbstractCegarLoop]: Abstraction has 7257 states and 11681 transitions. [2020-10-13 13:48:39,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:48:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 7257 states and 11681 transitions. [2020-10-13 13:48:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 13:48:39,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:48:39,162 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 13:48:39,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 13:48:39,163 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:48:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:48:39,163 INFO L82 PathProgramCache]: Analyzing trace with hash -703817465, now seen corresponding path program 1 times [2020-10-13 13:48:39,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:48:39,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876725821] [2020-10-13 13:48:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:48:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:39,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:39,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:39,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:39,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:39,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:39,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:39,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:43,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:44,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:44,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 13:48:44,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 13:48:44,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:48:44,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:44,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:48:44,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 13:48:44,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 13:48:44,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:48:44,382 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:48:44,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:48:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:44,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:44,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:44,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:48:44,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:48:44,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:48:44,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:44,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:48:44,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:48:44,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:48:44,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:48:44,408 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 13:48:44,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876725821] [2020-10-13 13:48:44,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:48:44,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:48:44,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703102997] [2020-10-13 13:48:44,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:48:44,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:48:44,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:48:44,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:48:44,410 INFO L87 Difference]: Start difference. First operand 7257 states and 11681 transitions. Second operand 5 states. [2020-10-13 13:48:44,595 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:48:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:48:45,539 INFO L93 Difference]: Finished difference Result 23452 states and 37920 transitions. [2020-10-13 13:48:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:48:45,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-13 13:48:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:48:45,586 INFO L225 Difference]: With dead ends: 23452 [2020-10-13 13:48:45,586 INFO L226 Difference]: Without dead ends: 16275 [2020-10-13 13:48:45,605 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 13:48:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16275 states. [2020-10-13 13:48:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16275 to 11713. [2020-10-13 13:48:46,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11713 states. [2020-10-13 13:48:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11713 states to 11713 states and 18813 transitions. [2020-10-13 13:48:46,452 INFO L78 Accepts]: Start accepts. Automaton has 11713 states and 18813 transitions. Word has length 63 [2020-10-13 13:48:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:48:46,453 INFO L479 AbstractCegarLoop]: Abstraction has 11713 states and 18813 transitions. [2020-10-13 13:48:46,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:48:46,453 INFO L276 IsEmpty]: Start isEmpty. Operand 11713 states and 18813 transitions. [2020-10-13 13:48:46,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 13:48:46,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:48:46,454 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 13:48:46,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 13:48:46,454 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:48:46,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:48:46,455 INFO L82 PathProgramCache]: Analyzing trace with hash -395999371, now seen corresponding path program 1 times [2020-10-13 13:48:46,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:48:46,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171863972] [2020-10-13 13:48:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:48:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:46,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:46,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:46,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:46,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:46,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:46,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:48,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:48,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:51,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:51,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 13:48:51,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 13:48:51,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 13:48:51,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:48:51,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 13:48:51,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 13:48:51,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:48:51,688 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:48:51,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:48:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:51,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:51,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:51,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:48:51,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:48:51,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:48:51,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:51,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:48:51,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:48:51,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:48:51,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 13:48:51,722 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 13:48:51,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171863972] [2020-10-13 13:48:51,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:48:51,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:48:51,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958541286] [2020-10-13 13:48:51,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:48:51,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:48:51,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:48:51,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:48:51,725 INFO L87 Difference]: Start difference. First operand 11713 states and 18813 transitions. Second operand 5 states. [2020-10-13 13:48:51,918 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:48:53,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:48:53,300 INFO L93 Difference]: Finished difference Result 37488 states and 60492 transitions. [2020-10-13 13:48:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:48:53,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-13 13:48:53,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:48:53,366 INFO L225 Difference]: With dead ends: 37488 [2020-10-13 13:48:53,366 INFO L226 Difference]: Without dead ends: 25855 [2020-10-13 13:48:53,392 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 13:48:53,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25855 states. [2020-10-13 13:48:54,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25855 to 18701. [2020-10-13 13:48:54,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18701 states. [2020-10-13 13:48:54,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18701 states to 18701 states and 29985 transitions. [2020-10-13 13:48:54,384 INFO L78 Accepts]: Start accepts. Automaton has 18701 states and 29985 transitions. Word has length 64 [2020-10-13 13:48:54,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:48:54,384 INFO L479 AbstractCegarLoop]: Abstraction has 18701 states and 29985 transitions. [2020-10-13 13:48:54,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:48:54,384 INFO L276 IsEmpty]: Start isEmpty. Operand 18701 states and 29985 transitions. [2020-10-13 13:48:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 13:48:54,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:48:54,385 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 13:48:54,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 13:48:54,386 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:48:54,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:48:54,387 INFO L82 PathProgramCache]: Analyzing trace with hash 207057605, now seen corresponding path program 1 times [2020-10-13 13:48:54,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:48:54,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193990564] [2020-10-13 13:48:54,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:48:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:54,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:54,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:54,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:54,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:54,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:54,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:54,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:59,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:59,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 13:48:59,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:48:59,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 13:48:59,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:59,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:48:59,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 13:48:59,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 13:48:59,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:48:59,637 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:48:59,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:48:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:48:59,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:48:59,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:48:59,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:48:59,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:48:59,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:48:59,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:48:59,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:48:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:48:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:48:59,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:48:59,671 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 13:48:59,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193990564] [2020-10-13 13:48:59,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:48:59,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:48:59,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721705401] [2020-10-13 13:48:59,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:48:59,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:48:59,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:48:59,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:48:59,673 INFO L87 Difference]: Start difference. First operand 18701 states and 29985 transitions. Second operand 6 states. [2020-10-13 13:48:59,816 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-10-13 13:49:00,079 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 13:49:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:49:02,141 INFO L93 Difference]: Finished difference Result 53023 states and 85327 transitions. [2020-10-13 13:49:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:49:02,142 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-13 13:49:02,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:49:02,211 INFO L225 Difference]: With dead ends: 53023 [2020-10-13 13:49:02,212 INFO L226 Difference]: Without dead ends: 34402 [2020-10-13 13:49:02,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:49:02,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34402 states. [2020-10-13 13:49:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34402 to 18701. [2020-10-13 13:49:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18701 states. [2020-10-13 13:49:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18701 states to 18701 states and 29844 transitions. [2020-10-13 13:49:04,395 INFO L78 Accepts]: Start accepts. Automaton has 18701 states and 29844 transitions. Word has length 66 [2020-10-13 13:49:04,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:49:04,395 INFO L479 AbstractCegarLoop]: Abstraction has 18701 states and 29844 transitions. [2020-10-13 13:49:04,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:49:04,395 INFO L276 IsEmpty]: Start isEmpty. Operand 18701 states and 29844 transitions. [2020-10-13 13:49:04,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 13:49:04,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:49:04,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:49:04,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 13:49:04,396 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:49:04,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:49:04,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1169451880, now seen corresponding path program 1 times [2020-10-13 13:49:04,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:49:04,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923625804] [2020-10-13 13:49:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:49:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:49:04,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:04,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:04,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:04,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:04,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:04,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:04,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:09,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:49:09,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 13:49:09,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:49:09,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:49:09,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:49:09,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:49:09,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 13:49:09,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 13:49:09,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:49:09,633 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:49:09,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:49:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:49:09,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:09,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:49:09,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:49:09,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:49:09,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:49:09,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:49:09,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:49:09,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:49:09,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:49:09,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:49:09,658 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 13:49:09,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923625804] [2020-10-13 13:49:09,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:49:09,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:49:09,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705530216] [2020-10-13 13:49:09,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:49:09,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:49:09,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:49:09,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:49:09,660 INFO L87 Difference]: Start difference. First operand 18701 states and 29844 transitions. Second operand 6 states. [2020-10-13 13:49:09,882 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 13:49:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:49:13,319 INFO L93 Difference]: Finished difference Result 82966 states and 133316 transitions. [2020-10-13 13:49:13,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:49:13,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-13 13:49:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:49:13,406 INFO L225 Difference]: With dead ends: 82966 [2020-10-13 13:49:13,406 INFO L226 Difference]: Without dead ends: 64345 [2020-10-13 13:49:13,449 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 13:49:13,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64345 states. [2020-10-13 13:49:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64345 to 34967. [2020-10-13 13:49:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34967 states. [2020-10-13 13:49:15,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34967 states to 34967 states and 55477 transitions. [2020-10-13 13:49:15,772 INFO L78 Accepts]: Start accepts. Automaton has 34967 states and 55477 transitions. Word has length 69 [2020-10-13 13:49:15,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:49:15,772 INFO L479 AbstractCegarLoop]: Abstraction has 34967 states and 55477 transitions. [2020-10-13 13:49:15,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:49:15,773 INFO L276 IsEmpty]: Start isEmpty. Operand 34967 states and 55477 transitions. [2020-10-13 13:49:15,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 13:49:15,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:49:15,773 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] [2020-10-13 13:49:15,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 13:49:15,773 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:49:15,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:49:15,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1895179230, now seen corresponding path program 1 times [2020-10-13 13:49:15,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:49:15,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584270481] [2020-10-13 13:49:15,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:49:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:49:15,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:15,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:15,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:15,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:15,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:16,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:16,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:20,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:49:20,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 13:49:20,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:49:20,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 13:49:20,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:49:20,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:49:20,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-13 13:49:20,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:49:20,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:49:20,983 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:49:20,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:49:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:49:20,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:20,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:49:20,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:49:20,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:49:20,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:49:20,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:49:20,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:49:20,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:49:20,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:49:20,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:49:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:49:20,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584270481] [2020-10-13 13:49:20,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:49:20,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:49:21,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729522344] [2020-10-13 13:49:21,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:49:21,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:49:21,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:49:21,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:49:21,001 INFO L87 Difference]: Start difference. First operand 34967 states and 55477 transitions. Second operand 5 states. [2020-10-13 13:49:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:49:24,839 INFO L93 Difference]: Finished difference Result 60398 states and 95262 transitions. [2020-10-13 13:49:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:49:24,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-13 13:49:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:49:24,911 INFO L225 Difference]: With dead ends: 60398 [2020-10-13 13:49:24,912 INFO L226 Difference]: Without dead ends: 60396 [2020-10-13 13:49:24,925 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 13:49:24,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60396 states. [2020-10-13 13:49:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60396 to 35831. [2020-10-13 13:49:27,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35831 states. [2020-10-13 13:49:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35831 states to 35831 states and 56332 transitions. [2020-10-13 13:49:27,442 INFO L78 Accepts]: Start accepts. Automaton has 35831 states and 56332 transitions. Word has length 70 [2020-10-13 13:49:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:49:27,442 INFO L479 AbstractCegarLoop]: Abstraction has 35831 states and 56332 transitions. [2020-10-13 13:49:27,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:49:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 35831 states and 56332 transitions. [2020-10-13 13:49:27,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 13:49:27,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:49:27,445 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] [2020-10-13 13:49:27,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 13:49:27,446 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:49:27,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:49:27,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1199307917, now seen corresponding path program 1 times [2020-10-13 13:49:27,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:49:27,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42715479] [2020-10-13 13:49:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:49:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:49:27,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:27,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:27,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:27,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:27,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:27,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:27,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:27,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:29,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:32,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:49:32,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 13:49:32,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 13:49:32,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 13:49:32,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:49:32,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:49:32,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 13:49:32,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 13:49:32,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:49:32,739 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:49:32,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:49:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:49:32,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:32,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:49:32,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:49:32,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:49:32,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:49:32,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:49:32,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:49:32,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:49:32,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:49:32,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:49:32,781 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 13:49:32,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42715479] [2020-10-13 13:49:32,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:49:32,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:49:32,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431430506] [2020-10-13 13:49:32,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:49:32,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:49:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:49:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:49:32,784 INFO L87 Difference]: Start difference. First operand 35831 states and 56332 transitions. Second operand 4 states. [2020-10-13 13:49:35,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:49:35,305 INFO L93 Difference]: Finished difference Result 65202 states and 102893 transitions. [2020-10-13 13:49:35,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:49:35,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-10-13 13:49:35,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:49:35,336 INFO L225 Difference]: With dead ends: 65202 [2020-10-13 13:49:35,337 INFO L226 Difference]: Without dead ends: 29451 [2020-10-13 13:49:35,366 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 13:49:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29451 states. [2020-10-13 13:49:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29451 to 29445. [2020-10-13 13:49:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29445 states. [2020-10-13 13:49:37,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29445 states to 29445 states and 46340 transitions. [2020-10-13 13:49:37,069 INFO L78 Accepts]: Start accepts. Automaton has 29445 states and 46340 transitions. Word has length 91 [2020-10-13 13:49:37,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:49:37,069 INFO L479 AbstractCegarLoop]: Abstraction has 29445 states and 46340 transitions. [2020-10-13 13:49:37,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:49:37,070 INFO L276 IsEmpty]: Start isEmpty. Operand 29445 states and 46340 transitions. [2020-10-13 13:49:37,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 13:49:37,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:49:37,072 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] [2020-10-13 13:49:37,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 13:49:37,072 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:49:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:49:37,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1058189885, now seen corresponding path program 1 times [2020-10-13 13:49:37,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:49:37,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123017367] [2020-10-13 13:49:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:49:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:49:37,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:37,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:37,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:37,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:37,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:37,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:37,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:37,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:39,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:42,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:49:42,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 13:49:42,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 13:49:42,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 13:49:42,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:49:42,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:49:42,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:49:42,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 13:49:42,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:49:42,315 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:49:42,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:49:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:49:42,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:42,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:49:42,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:49:42,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:49:42,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:49:42,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:49:42,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:49:42,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:49:42,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:49:42,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:49:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 13:49:42,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123017367] [2020-10-13 13:49:42,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:49:42,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:49:42,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897318712] [2020-10-13 13:49:42,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:49:42,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:49:42,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:49:42,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:49:42,341 INFO L87 Difference]: Start difference. First operand 29445 states and 46340 transitions. Second operand 5 states. [2020-10-13 13:49:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:49:47,152 INFO L93 Difference]: Finished difference Result 86732 states and 136483 transitions. [2020-10-13 13:49:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:49:47,153 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2020-10-13 13:49:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:49:47,224 INFO L225 Difference]: With dead ends: 86732 [2020-10-13 13:49:47,224 INFO L226 Difference]: Without dead ends: 57316 [2020-10-13 13:49:47,257 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 13:49:47,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57316 states. [2020-10-13 13:49:52,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57316 to 57314. [2020-10-13 13:49:52,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57314 states. [2020-10-13 13:49:52,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57314 states to 57314 states and 89602 transitions. [2020-10-13 13:49:52,811 INFO L78 Accepts]: Start accepts. Automaton has 57314 states and 89602 transitions. Word has length 91 [2020-10-13 13:49:52,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:49:52,811 INFO L479 AbstractCegarLoop]: Abstraction has 57314 states and 89602 transitions. [2020-10-13 13:49:52,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:49:52,812 INFO L276 IsEmpty]: Start isEmpty. Operand 57314 states and 89602 transitions. [2020-10-13 13:49:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 13:49:52,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:49:52,814 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] [2020-10-13 13:49:52,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 13:49:52,815 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:49:52,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:49:52,815 INFO L82 PathProgramCache]: Analyzing trace with hash -782521019, now seen corresponding path program 1 times [2020-10-13 13:49:52,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:49:52,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339544991] [2020-10-13 13:49:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:49:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:49:52,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:52,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:52,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:52,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:52,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:52,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:53,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:53,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:53,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:55,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:56,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:57,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:49:57,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 13:49:57,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:49:57,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:49:57,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:49:57,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:49:57,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:49:57,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:49:57,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:49:57,997 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:49:57,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:49:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:49:58,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:58,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:49:58,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:49:58,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:49:58,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:49:58,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:49:58,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:49:58,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:49:58,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:49:58,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:49:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 13:49:58,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339544991] [2020-10-13 13:49:58,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:49:58,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:49:58,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070711915] [2020-10-13 13:49:58,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:49:58,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:49:58,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:49:58,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:49:58,021 INFO L87 Difference]: Start difference. First operand 57314 states and 89602 transitions. Second operand 4 states. [2020-10-13 13:50:07,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:07,122 INFO L93 Difference]: Finished difference Result 171896 states and 268734 transitions. [2020-10-13 13:50:07,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:50:07,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2020-10-13 13:50:07,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:07,272 INFO L225 Difference]: With dead ends: 171896 [2020-10-13 13:50:07,272 INFO L226 Difference]: Without dead ends: 114614 [2020-10-13 13:50:07,324 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 13:50:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114614 states. [2020-10-13 13:50:14,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114614 to 57316. [2020-10-13 13:50:14,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57316 states. [2020-10-13 13:50:14,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57316 states to 57316 states and 89604 transitions. [2020-10-13 13:50:14,190 INFO L78 Accepts]: Start accepts. Automaton has 57316 states and 89604 transitions. Word has length 92 [2020-10-13 13:50:14,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:50:14,191 INFO L479 AbstractCegarLoop]: Abstraction has 57316 states and 89604 transitions. [2020-10-13 13:50:14,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:50:14,191 INFO L276 IsEmpty]: Start isEmpty. Operand 57316 states and 89604 transitions. [2020-10-13 13:50:14,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 13:50:14,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:50:14,194 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] [2020-10-13 13:50:14,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 13:50:14,194 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:50:14,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:50:14,195 INFO L82 PathProgramCache]: Analyzing trace with hash 618549157, now seen corresponding path program 1 times [2020-10-13 13:50:14,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:50:14,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88145124] [2020-10-13 13:50:14,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:50:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:14,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:14,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:14,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:14,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:14,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:14,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:14,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:15,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:15,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:15,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:16,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:16,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:16,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:19,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:19,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 13:50:19,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 13:50:19,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 13:50:19,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:19,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:50:19,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 13:50:19,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 13:50:19,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:19,428 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:50:19,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:50:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:19,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:19,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:19,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:50:19,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:50:19,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:50:19,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:19,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:50:19,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:50:19,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:50:19,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:19,453 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 13:50:19,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88145124] [2020-10-13 13:50:19,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:50:19,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:50:19,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643817466] [2020-10-13 13:50:19,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:50:19,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:50:19,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:50:19,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:50:19,455 INFO L87 Difference]: Start difference. First operand 57316 states and 89604 transitions. Second operand 4 states. [2020-10-13 13:50:21,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:21,984 INFO L93 Difference]: Finished difference Result 80061 states and 125351 transitions. [2020-10-13 13:50:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:50:21,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-13 13:50:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:22,010 INFO L225 Difference]: With dead ends: 80061 [2020-10-13 13:50:22,010 INFO L226 Difference]: Without dead ends: 22939 [2020-10-13 13:50:22,051 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 13:50:22,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22939 states. [2020-10-13 13:50:23,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22939 to 22758. [2020-10-13 13:50:23,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22758 states. [2020-10-13 13:50:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22758 states to 22758 states and 35457 transitions. [2020-10-13 13:50:23,998 INFO L78 Accepts]: Start accepts. Automaton has 22758 states and 35457 transitions. Word has length 93 [2020-10-13 13:50:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:50:23,998 INFO L479 AbstractCegarLoop]: Abstraction has 22758 states and 35457 transitions. [2020-10-13 13:50:23,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:50:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 22758 states and 35457 transitions. [2020-10-13 13:50:24,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 13:50:24,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:50:24,001 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] [2020-10-13 13:50:24,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 13:50:24,002 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:50:24,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:50:24,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1397997116, now seen corresponding path program 1 times [2020-10-13 13:50:24,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:50:24,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179144947] [2020-10-13 13:50:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:50:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:24,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:24,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:24,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:24,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:24,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:24,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:24,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:24,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:24,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:24,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:26,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:26,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:29,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:29,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 13:50:29,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 13:50:29,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 13:50:29,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:29,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:50:29,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:50:29,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 13:50:29,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:29,206 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:50:29,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:50:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:29,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:29,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:29,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:50:29,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:50:29,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:50:29,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:29,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:50:29,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:50:29,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:50:29,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:29,236 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 13:50:29,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179144947] [2020-10-13 13:50:29,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:50:29,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:50:29,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960826056] [2020-10-13 13:50:29,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:50:29,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:50:29,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:50:29,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:50:29,238 INFO L87 Difference]: Start difference. First operand 22758 states and 35457 transitions. Second operand 5 states. [2020-10-13 13:50:33,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:33,617 INFO L93 Difference]: Finished difference Result 66932 states and 104231 transitions. [2020-10-13 13:50:33,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:50:33,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-10-13 13:50:33,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:33,669 INFO L225 Difference]: With dead ends: 66932 [2020-10-13 13:50:33,669 INFO L226 Difference]: Without dead ends: 44190 [2020-10-13 13:50:33,693 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 13:50:33,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44190 states. [2020-10-13 13:50:37,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44190 to 44188. [2020-10-13 13:50:37,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44188 states. [2020-10-13 13:50:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44188 states to 44188 states and 68270 transitions. [2020-10-13 13:50:37,772 INFO L78 Accepts]: Start accepts. Automaton has 44188 states and 68270 transitions. Word has length 93 [2020-10-13 13:50:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:50:37,773 INFO L479 AbstractCegarLoop]: Abstraction has 44188 states and 68270 transitions. [2020-10-13 13:50:37,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:50:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 44188 states and 68270 transitions. [2020-10-13 13:50:37,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 13:50:37,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:50:37,778 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] [2020-10-13 13:50:37,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 13:50:37,778 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:50:37,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:50:37,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1628067835, now seen corresponding path program 1 times [2020-10-13 13:50:37,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:50:37,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143911767] [2020-10-13 13:50:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:50:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:37,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:37,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:37,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:37,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:37,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:37,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:38,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:39,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:39,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:39,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:42,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:42,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 13:50:42,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:50:42,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 13:50:42,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:42,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:50:42,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:50:42,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 13:50:42,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:42,985 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:50:42,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:50:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:42,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:42,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:42,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:50:42,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:50:42,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:50:42,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:42,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:50:42,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:50:42,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:50:42,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 13:50:43,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143911767] [2020-10-13 13:50:43,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:50:43,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:50:43,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192648278] [2020-10-13 13:50:43,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:50:43,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:50:43,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:50:43,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:50:43,013 INFO L87 Difference]: Start difference. First operand 44188 states and 68270 transitions. Second operand 5 states. [2020-10-13 13:50:51,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:51,922 INFO L93 Difference]: Finished difference Result 129444 states and 199864 transitions. [2020-10-13 13:50:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:50:51,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-10-13 13:50:51,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:52,039 INFO L225 Difference]: With dead ends: 129444 [2020-10-13 13:50:52,040 INFO L226 Difference]: Without dead ends: 85306 [2020-10-13 13:50:52,081 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 13:50:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85306 states. [2020-10-13 13:51:01,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85306 to 85304. [2020-10-13 13:51:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85304 states. [2020-10-13 13:51:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85304 states to 85304 states and 130516 transitions. [2020-10-13 13:51:01,597 INFO L78 Accepts]: Start accepts. Automaton has 85304 states and 130516 transitions. Word has length 93 [2020-10-13 13:51:01,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:01,597 INFO L479 AbstractCegarLoop]: Abstraction has 85304 states and 130516 transitions. [2020-10-13 13:51:01,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:51:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 85304 states and 130516 transitions. [2020-10-13 13:51:01,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 13:51:01,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:01,605 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] [2020-10-13 13:51:01,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 13:51:01,605 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:01,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:01,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1431670947, now seen corresponding path program 1 times [2020-10-13 13:51:01,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:01,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420647611] [2020-10-13 13:51:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:01,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:01,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:01,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:01,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:01,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:02,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:02,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:02,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:02,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:03,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:06,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:06,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 13:51:06,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:51:06,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 13:51:06,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:06,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:51:06,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 13:51:06,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:51:06,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:06,796 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:51:06,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:06,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:06,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:06,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:06,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:06,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 13:51:06,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:06,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:06,818 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 13:51:06,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420647611] [2020-10-13 13:51:06,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:06,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:51:06,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968821051] [2020-10-13 13:51:06,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:51:06,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:06,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:51:06,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:51:06,820 INFO L87 Difference]: Start difference. First operand 85304 states and 130516 transitions. Second operand 4 states. [2020-10-13 13:51:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:23,346 INFO L93 Difference]: Finished difference Result 255780 states and 391346 transitions. [2020-10-13 13:51:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:51:23,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-10-13 13:51:23,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:23,578 INFO L225 Difference]: With dead ends: 255780 [2020-10-13 13:51:23,578 INFO L226 Difference]: Without dead ends: 170554 [2020-10-13 13:51:23,646 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 13:51:23,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170554 states.