/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_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:54:15,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:54:15,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:54:15,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:54:15,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:54:15,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:54:15,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:54:15,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:54:15,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:54:15,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:54:15,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:54:15,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:54:15,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:54:15,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:54:15,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:54:15,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:54:15,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:54:15,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:54:15,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:54:15,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:54:15,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:54:15,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:54:15,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:54:15,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:54:15,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:54:15,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:54:15,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:54:15,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:54:15,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:54:15,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:54:15,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:54:15,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:54:15,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:54:15,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:54:15,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:54:15,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:54:15,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:54:15,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:54:15,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:54:15,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:54:15,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:54:15,142 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:54:15,164 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:54:15,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:54:15,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:54:15,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:54:15,165 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:54:15,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:54:15,166 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:54:15,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:54:15,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:54:15,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:54:15,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:54:15,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:54:15,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:54:15,167 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:54:15,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:54:15,167 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:54:15,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:54:15,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:54:15,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:54:15,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:54:15,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:54:15,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:54:15,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:54:15,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:54:15,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:54:15,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:54:15,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:54:15,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:54:15,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:54:15,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:54:15,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:54:15,504 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:54:15,507 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:54:15,509 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:54:15,509 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:54:15,510 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:54:15,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/500fb0c60/c1a56a8c68364574884087b51f46d2d0/FLAG96a1a1c83 [2020-10-13 14:54:16,073 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:54:16,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:54:16,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/500fb0c60/c1a56a8c68364574884087b51f46d2d0/FLAG96a1a1c83 [2020-10-13 14:54:16,380 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/500fb0c60/c1a56a8c68364574884087b51f46d2d0 [2020-10-13 14:54:16,389 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:54:16,391 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:54:16,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:54:16,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:54:16,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:54:16,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:54:16" (1/1) ... [2020-10-13 14:54:16,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8831ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:54:16, skipping insertion in model container [2020-10-13 14:54:16,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:54:16" (1/1) ... [2020-10-13 14:54:16,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:54:16,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:54:16,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:54:16,744 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:54:16,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:54:16,944 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:54:16,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:54:16 WrapperNode [2020-10-13 14:54:16,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:54:16,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:54:16,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:54:16,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:54:16,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:54:16" (1/1) ... [2020-10-13 14:54:16,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:54:16" (1/1) ... [2020-10-13 14:54:16,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:54:16" (1/1) ... [2020-10-13 14:54:16,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:54:16" (1/1) ... [2020-10-13 14:54:16,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:54:16" (1/1) ... [2020-10-13 14:54:16,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:54:16" (1/1) ... [2020-10-13 14:54:17,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:54:16" (1/1) ... [2020-10-13 14:54:17,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:54:17,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:54:17,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:54:17,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:54:17,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:54:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:54:17,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:54:17,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:54:17,071 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:54:17,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:54:17,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:54:17,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:54:17,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:54:17,072 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:54:17,072 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:54:17,072 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:54:17,073 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:54:17,073 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:54:17,073 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:54:17,073 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:54:17,073 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:54:17,073 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:54:17,073 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:54:17,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:54:17,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:54:17,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:54:17,831 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:54:17,831 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:54:17,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:54:17 BoogieIcfgContainer [2020-10-13 14:54:17,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:54:17,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:54:17,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:54:17,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:54:17,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:54:16" (1/3) ... [2020-10-13 14:54:17,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c37180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:54:17, skipping insertion in model container [2020-10-13 14:54:17,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:54:16" (2/3) ... [2020-10-13 14:54:17,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c37180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:54:17, skipping insertion in model container [2020-10-13 14:54:17,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:54:17" (3/3) ... [2020-10-13 14:54:17,846 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:54:17,858 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:54:17,866 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:54:17,881 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:54:17,908 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:54:17,909 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:54:17,909 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:54:17,909 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:54:17,909 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:54:17,910 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:54:17,910 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:54:17,910 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:54:17,934 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states. [2020-10-13 14:54:17,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:54:17,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:17,947 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 14:54:17,948 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:17,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1156285635, now seen corresponding path program 1 times [2020-10-13 14:54:17,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:17,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278320738] [2020-10-13 14:54:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:18,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:18,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:18,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:19,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:20,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:20,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:54:20,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:54:20,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2184 [2020-10-13 14:54:20,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:20,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:54:20,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 14:54:20,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:54:20,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:54:20,864 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:54:20,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:20,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:20,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:20,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:20,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:20,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:54:20,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:20,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:20,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:20,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:20,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:20,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278320738] [2020-10-13 14:54:20,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:20,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:54:20,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954276346] [2020-10-13 14:54:20,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:54:20,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:20,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:54:20,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:54:20,933 INFO L87 Difference]: Start difference. First operand 148 states. Second operand 4 states. [2020-10-13 14:54:21,213 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 14:54:21,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:21,965 INFO L93 Difference]: Finished difference Result 324 states and 542 transitions. [2020-10-13 14:54:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:54:21,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-13 14:54:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:21,984 INFO L225 Difference]: With dead ends: 324 [2020-10-13 14:54:21,984 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 14:54:21,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:54:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 14:54:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2020-10-13 14:54:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-13 14:54:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 347 transitions. [2020-10-13 14:54:22,055 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 347 transitions. Word has length 60 [2020-10-13 14:54:22,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:22,055 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 347 transitions. [2020-10-13 14:54:22,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:54:22,056 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 347 transitions. [2020-10-13 14:54:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 14:54:22,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:22,063 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 14:54:22,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:54:22,063 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:22,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1190725182, now seen corresponding path program 1 times [2020-10-13 14:54:22,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:22,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138965823] [2020-10-13 14:54:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:22,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:22,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:22,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:22,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:23,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:25,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:25,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 14:54:25,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:54:25,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3824 [2020-10-13 14:54:25,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:25,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:54:25,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 14:54:25,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:54:25,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:54:26,184 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:54:26,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:26,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:26,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:26,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:26,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:26,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:54:26,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:26,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:26,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:26,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:26,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 24 [2020-10-13 14:54:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:26,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138965823] [2020-10-13 14:54:26,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:26,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:54:26,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798084342] [2020-10-13 14:54:26,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:54:26,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:26,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:54:26,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:54:26,245 INFO L87 Difference]: Start difference. First operand 221 states and 347 transitions. Second operand 4 states. [2020-10-13 14:54:26,462 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 14:54:27,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:27,037 INFO L93 Difference]: Finished difference Result 537 states and 867 transitions. [2020-10-13 14:54:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:54:27,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-13 14:54:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:27,041 INFO L225 Difference]: With dead ends: 537 [2020-10-13 14:54:27,041 INFO L226 Difference]: Without dead ends: 371 [2020-10-13 14:54:27,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:54:27,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-10-13 14:54:27,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 369. [2020-10-13 14:54:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-13 14:54:27,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 590 transitions. [2020-10-13 14:54:27,070 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 590 transitions. Word has length 62 [2020-10-13 14:54:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:27,070 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 590 transitions. [2020-10-13 14:54:27,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:54:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 590 transitions. [2020-10-13 14:54:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 14:54:27,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:27,075 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 14:54:27,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:54:27,076 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:27,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:27,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1337157249, now seen corresponding path program 1 times [2020-10-13 14:54:27,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:27,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857209072] [2020-10-13 14:54:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:27,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:27,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:27,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:27,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:27,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:29,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:32,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:32,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 14:54:32,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:54:32,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:54:32,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:32,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:54:32,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 14:54:32,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 14:54:32,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:54:32,356 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:54:32,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:32,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:32,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:32,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:32,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:32,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:54:32,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:32,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:32,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:32,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857209072] [2020-10-13 14:54:32,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:32,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:54:32,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359391808] [2020-10-13 14:54:32,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:54:32,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:32,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:54:32,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:54:32,389 INFO L87 Difference]: Start difference. First operand 369 states and 590 transitions. Second operand 6 states. [2020-10-13 14:54:32,643 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:54:33,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:33,380 INFO L93 Difference]: Finished difference Result 1653 states and 2721 transitions. [2020-10-13 14:54:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:54:33,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-13 14:54:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:33,389 INFO L225 Difference]: With dead ends: 1653 [2020-10-13 14:54:33,389 INFO L226 Difference]: Without dead ends: 1339 [2020-10-13 14:54:33,391 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 14:54:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2020-10-13 14:54:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 673. [2020-10-13 14:54:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2020-10-13 14:54:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1090 transitions. [2020-10-13 14:54:33,435 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1090 transitions. Word has length 64 [2020-10-13 14:54:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:33,436 INFO L479 AbstractCegarLoop]: Abstraction has 673 states and 1090 transitions. [2020-10-13 14:54:33,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:54:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1090 transitions. [2020-10-13 14:54:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 14:54:33,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:33,440 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] [2020-10-13 14:54:33,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:54:33,440 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1436187773, now seen corresponding path program 1 times [2020-10-13 14:54:33,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:33,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237067107] [2020-10-13 14:54:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:33,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:33,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:33,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:33,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:33,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:34,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:34,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:38,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:38,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 14:54:38,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:54:38,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:54:38,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:38,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:54:38,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 14:54:38,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 14:54:38,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:38,697 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:54:38,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:38,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:38,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:38,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:38,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:38,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:54:38,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:38,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:38,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:38,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:38,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:38,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237067107] [2020-10-13 14:54:38,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:38,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:54:38,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057421669] [2020-10-13 14:54:38,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:54:38,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:38,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:54:38,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:54:38,737 INFO L87 Difference]: Start difference. First operand 673 states and 1090 transitions. Second operand 7 states. [2020-10-13 14:54:39,017 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-13 14:54:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:40,242 INFO L93 Difference]: Finished difference Result 3610 states and 5913 transitions. [2020-10-13 14:54:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 14:54:40,243 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-13 14:54:40,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:40,260 INFO L225 Difference]: With dead ends: 3610 [2020-10-13 14:54:40,260 INFO L226 Difference]: Without dead ends: 2992 [2020-10-13 14:54:40,263 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 14:54:40,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2020-10-13 14:54:40,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 1956. [2020-10-13 14:54:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1956 states. [2020-10-13 14:54:40,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3185 transitions. [2020-10-13 14:54:40,392 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3185 transitions. Word has length 65 [2020-10-13 14:54:40,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:40,393 INFO L479 AbstractCegarLoop]: Abstraction has 1956 states and 3185 transitions. [2020-10-13 14:54:40,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:54:40,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3185 transitions. [2020-10-13 14:54:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:54:40,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:40,395 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 14:54:40,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:54:40,396 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:40,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:40,396 INFO L82 PathProgramCache]: Analyzing trace with hash -675557447, now seen corresponding path program 1 times [2020-10-13 14:54:40,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:40,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561789535] [2020-10-13 14:54:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:40,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:40,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:40,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:40,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:41,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:41,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:41,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:42,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:45,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:45,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:54:45,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:54:45,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:54:45,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:45,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:54:45,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 14:54:45,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 14:54:45,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:45,694 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:54:45,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:45,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:45,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:45,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:45,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:45,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:54:45,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:45,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:45,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:45,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:45,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:54:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:45,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561789535] [2020-10-13 14:54:45,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:45,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:54:45,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674668862] [2020-10-13 14:54:45,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:54:45,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:45,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:54:45,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:54:45,760 INFO L87 Difference]: Start difference. First operand 1956 states and 3185 transitions. Second operand 4 states. [2020-10-13 14:54:46,084 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:54:46,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:46,991 INFO L93 Difference]: Finished difference Result 3846 states and 6307 transitions. [2020-10-13 14:54:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:54:46,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-13 14:54:46,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:47,006 INFO L225 Difference]: With dead ends: 3846 [2020-10-13 14:54:47,006 INFO L226 Difference]: Without dead ends: 2701 [2020-10-13 14:54:47,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:54:47,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2020-10-13 14:54:47,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2699. [2020-10-13 14:54:47,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2699 states. [2020-10-13 14:54:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 4394 transitions. [2020-10-13 14:54:47,167 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 4394 transitions. Word has length 66 [2020-10-13 14:54:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:47,168 INFO L479 AbstractCegarLoop]: Abstraction has 2699 states and 4394 transitions. [2020-10-13 14:54:47,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:54:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 4394 transitions. [2020-10-13 14:54:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:54:47,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:47,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:54:47,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:54:47,170 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash 43018711, now seen corresponding path program 1 times [2020-10-13 14:54:47,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:47,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493217059] [2020-10-13 14:54:47,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:47,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:47,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:47,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:47,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:47,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:47,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:48,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:48,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:52,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:52,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:54:52,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:54:52,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:54:52,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:52,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:54:52,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:54:52,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 14:54:52,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:52,395 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:54:52,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:52,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:52,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:52,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:52,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:52,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:54:52,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:52,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:52,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493217059] [2020-10-13 14:54:52,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:52,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:54:52,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558871558] [2020-10-13 14:54:52,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:54:52,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:52,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:54:52,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:54:52,423 INFO L87 Difference]: Start difference. First operand 2699 states and 4394 transitions. Second operand 4 states. [2020-10-13 14:54:52,629 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:54:53,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:53,528 INFO L93 Difference]: Finished difference Result 5021 states and 8203 transitions. [2020-10-13 14:54:53,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:54:53,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-13 14:54:53,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:53,546 INFO L225 Difference]: With dead ends: 5021 [2020-10-13 14:54:53,547 INFO L226 Difference]: Without dead ends: 3634 [2020-10-13 14:54:53,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:54:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2020-10-13 14:54:53,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 3632. [2020-10-13 14:54:53,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3632 states. [2020-10-13 14:54:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 5896 transitions. [2020-10-13 14:54:53,829 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 5896 transitions. Word has length 66 [2020-10-13 14:54:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:53,829 INFO L479 AbstractCegarLoop]: Abstraction has 3632 states and 5896 transitions. [2020-10-13 14:54:53,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:54:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 5896 transitions. [2020-10-13 14:54:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:54:53,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:53,831 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 14:54:53,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:54:53,831 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:53,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1515095558, now seen corresponding path program 1 times [2020-10-13 14:54:53,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:53,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670550420] [2020-10-13 14:54:53,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:53,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:53,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:53,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:53,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:54,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:54,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:54,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:58,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:58,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:54:58,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:54:58,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4461 [2020-10-13 14:54:58,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:58,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:54:58,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 14:54:58,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 14:54:58,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:58,584 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:54:58,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:58,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:58,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:58,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:58,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:58,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:54:58,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:58,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:58,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:58,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:58,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:54:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:58,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670550420] [2020-10-13 14:54:58,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:58,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:54:58,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784971655] [2020-10-13 14:54:58,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:54:58,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:58,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:54:58,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:54:58,630 INFO L87 Difference]: Start difference. First operand 3632 states and 5896 transitions. Second operand 4 states. [2020-10-13 14:54:58,821 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 14:54:59,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:59,667 INFO L93 Difference]: Finished difference Result 9743 states and 15812 transitions. [2020-10-13 14:54:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:54:59,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-13 14:54:59,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:59,699 INFO L225 Difference]: With dead ends: 9743 [2020-10-13 14:54:59,700 INFO L226 Difference]: Without dead ends: 6384 [2020-10-13 14:54:59,709 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 14:54:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2020-10-13 14:55:00,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 6382. [2020-10-13 14:55:00,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6382 states. [2020-10-13 14:55:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6382 states to 6382 states and 10287 transitions. [2020-10-13 14:55:00,042 INFO L78 Accepts]: Start accepts. Automaton has 6382 states and 10287 transitions. Word has length 66 [2020-10-13 14:55:00,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:55:00,043 INFO L479 AbstractCegarLoop]: Abstraction has 6382 states and 10287 transitions. [2020-10-13 14:55:00,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:55:00,043 INFO L276 IsEmpty]: Start isEmpty. Operand 6382 states and 10287 transitions. [2020-10-13 14:55:00,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:55:00,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:00,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:55:00,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:55:00,045 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:00,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1768568310, now seen corresponding path program 1 times [2020-10-13 14:55:00,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:00,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837940119] [2020-10-13 14:55:00,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:00,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:00,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:00,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:00,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:00,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:00,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:00,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:00,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:01,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:05,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:05,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:55:05,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:55:05,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:55:05,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:05,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:55:05,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 14:55:05,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 14:55:05,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:05,286 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:55:05,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:55:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:05,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:05,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:05,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:55:05,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:55:05,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:55:05,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:05,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:55:05,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:55:05,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:55:05,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:55:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:55:05,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837940119] [2020-10-13 14:55:05,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:55:05,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:55:05,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144581392] [2020-10-13 14:55:05,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:55:05,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:55:05,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:55:05,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:55:05,329 INFO L87 Difference]: Start difference. First operand 6382 states and 10287 transitions. Second operand 4 states. [2020-10-13 14:55:05,523 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:55:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:55:06,553 INFO L93 Difference]: Finished difference Result 11912 states and 19235 transitions. [2020-10-13 14:55:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:55:06,553 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-13 14:55:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:55:06,595 INFO L225 Difference]: With dead ends: 11912 [2020-10-13 14:55:06,595 INFO L226 Difference]: Without dead ends: 8369 [2020-10-13 14:55:06,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:55:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8369 states. [2020-10-13 14:55:06,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8369 to 8367. [2020-10-13 14:55:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8367 states. [2020-10-13 14:55:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8367 states to 8367 states and 13407 transitions. [2020-10-13 14:55:06,982 INFO L78 Accepts]: Start accepts. Automaton has 8367 states and 13407 transitions. Word has length 68 [2020-10-13 14:55:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:55:06,982 INFO L479 AbstractCegarLoop]: Abstraction has 8367 states and 13407 transitions. [2020-10-13 14:55:06,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:55:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 8367 states and 13407 transitions. [2020-10-13 14:55:06,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:55:06,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:06,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:55:06,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:55:06,984 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:06,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:06,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1608352967, now seen corresponding path program 1 times [2020-10-13 14:55:06,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:06,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158858973] [2020-10-13 14:55:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:07,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:07,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:07,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:07,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:07,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:07,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:07,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:10,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:12,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:12,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:55:12,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:55:12,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:55:12,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:12,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:55:12,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 14:55:12,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 14:55:12,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:12,207 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:55:12,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:55:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:12,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:12,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:12,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:55:12,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:55:12,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:55:12,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:12,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:55:12,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:55:12,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:55:12,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:55:12,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158858973] [2020-10-13 14:55:12,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:55:12,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:55:12,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537047319] [2020-10-13 14:55:12,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:55:12,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:55:12,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:55:12,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:55:12,235 INFO L87 Difference]: Start difference. First operand 8367 states and 13407 transitions. Second operand 5 states. [2020-10-13 14:55:12,446 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:55:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:55:13,470 INFO L93 Difference]: Finished difference Result 27037 states and 43441 transitions. [2020-10-13 14:55:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:55:13,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-13 14:55:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:55:13,524 INFO L225 Difference]: With dead ends: 27037 [2020-10-13 14:55:13,524 INFO L226 Difference]: Without dead ends: 18759 [2020-10-13 14:55:13,547 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 14:55:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18759 states. [2020-10-13 14:55:14,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18759 to 13510. [2020-10-13 14:55:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13510 states. [2020-10-13 14:55:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13510 states to 13510 states and 21580 transitions. [2020-10-13 14:55:14,239 INFO L78 Accepts]: Start accepts. Automaton has 13510 states and 21580 transitions. Word has length 68 [2020-10-13 14:55:14,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:55:14,239 INFO L479 AbstractCegarLoop]: Abstraction has 13510 states and 21580 transitions. [2020-10-13 14:55:14,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:55:14,239 INFO L276 IsEmpty]: Start isEmpty. Operand 13510 states and 21580 transitions. [2020-10-13 14:55:14,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:55:14,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:14,240 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 14:55:14,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:55:14,241 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:14,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:14,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1733159997, now seen corresponding path program 1 times [2020-10-13 14:55:14,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:14,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767163544] [2020-10-13 14:55:14,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:14,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:14,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:14,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:14,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:14,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:14,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:14,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:19,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:19,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:55:19,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:55:19,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:55:19,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:19,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:55:19,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 14:55:19,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 14:55:19,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:19,460 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:55:19,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:55:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:19,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:19,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:19,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:55:19,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:55:19,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:55:19,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:19,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:55:19,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:55:19,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:55:19,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:55:19,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767163544] [2020-10-13 14:55:19,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:55:19,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:55:19,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522504961] [2020-10-13 14:55:19,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:55:19,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:55:19,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:55:19,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:55:19,487 INFO L87 Difference]: Start difference. First operand 13510 states and 21580 transitions. Second operand 5 states. [2020-10-13 14:55:19,686 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:55:21,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:55:21,114 INFO L93 Difference]: Finished difference Result 43231 states and 69247 transitions. [2020-10-13 14:55:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:55:21,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-13 14:55:21,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:55:21,196 INFO L225 Difference]: With dead ends: 43231 [2020-10-13 14:55:21,197 INFO L226 Difference]: Without dead ends: 29810 [2020-10-13 14:55:21,225 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 14:55:21,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29810 states. [2020-10-13 14:55:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29810 to 21577. [2020-10-13 14:55:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21577 states. [2020-10-13 14:55:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 34369 transitions. [2020-10-13 14:55:22,246 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 34369 transitions. Word has length 69 [2020-10-13 14:55:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:55:22,247 INFO L479 AbstractCegarLoop]: Abstraction has 21577 states and 34369 transitions. [2020-10-13 14:55:22,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:55:22,247 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 34369 transitions. [2020-10-13 14:55:22,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:55:22,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:22,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:55:22,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:55:22,248 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:22,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:22,248 INFO L82 PathProgramCache]: Analyzing trace with hash -609082029, now seen corresponding path program 1 times [2020-10-13 14:55:22,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:22,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789162392] [2020-10-13 14:55:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:22,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:22,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:22,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:22,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:22,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:22,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:23,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:27,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:27,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:55:27,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:55:27,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:55:27,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:27,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:55:27,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 14:55:27,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 14:55:27,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:27,565 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:55:27,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:55:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:27,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:27,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:27,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:55:27,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:55:27,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:55:27,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:27,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:55:27,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:55:27,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:55:27,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:55:27,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789162392] [2020-10-13 14:55:27,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:55:27,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:55:27,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768516118] [2020-10-13 14:55:27,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:55:27,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:55:27,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:55:27,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:55:27,602 INFO L87 Difference]: Start difference. First operand 21577 states and 34369 transitions. Second operand 6 states. [2020-10-13 14:55:27,860 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-13 14:55:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:55:29,988 INFO L93 Difference]: Finished difference Result 61114 states and 97606 transitions. [2020-10-13 14:55:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:55:29,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-13 14:55:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:55:30,065 INFO L225 Difference]: With dead ends: 61114 [2020-10-13 14:55:30,065 INFO L226 Difference]: Without dead ends: 39626 [2020-10-13 14:55:30,120 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 14:55:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39626 states. [2020-10-13 14:55:32,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39626 to 21577. [2020-10-13 14:55:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21577 states. [2020-10-13 14:55:32,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 34228 transitions. [2020-10-13 14:55:32,285 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 34228 transitions. Word has length 71 [2020-10-13 14:55:32,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:55:32,285 INFO L479 AbstractCegarLoop]: Abstraction has 21577 states and 34228 transitions. [2020-10-13 14:55:32,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:55:32,285 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 34228 transitions. [2020-10-13 14:55:32,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 14:55:32,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:32,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:55:32,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:55:32,286 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:32,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:32,286 INFO L82 PathProgramCache]: Analyzing trace with hash -975411816, now seen corresponding path program 1 times [2020-10-13 14:55:32,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:32,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782316408] [2020-10-13 14:55:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:32,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:32,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:32,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:32,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:32,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:32,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:32,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:37,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:37,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 14:55:37,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:55:37,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:55:37,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:37,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:55:37,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 14:55:37,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 14:55:37,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:37,534 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:55:37,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:55:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:37,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:37,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:37,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:55:37,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:55:37,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:55:37,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:37,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:55:37,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:55:37,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:55:37,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:55:37,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782316408] [2020-10-13 14:55:37,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:55:37,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:55:37,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144968525] [2020-10-13 14:55:37,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:55:37,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:55:37,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:55:37,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:55:37,561 INFO L87 Difference]: Start difference. First operand 21577 states and 34228 transitions. Second operand 6 states. [2020-10-13 14:55:37,862 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-13 14:55:41,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:55:41,367 INFO L93 Difference]: Finished difference Result 95588 states and 152448 transitions. [2020-10-13 14:55:41,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:55:41,367 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-13 14:55:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:55:41,477 INFO L225 Difference]: With dead ends: 95588 [2020-10-13 14:55:41,477 INFO L226 Difference]: Without dead ends: 74100 [2020-10-13 14:55:41,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:55:41,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74100 states. [2020-10-13 14:55:43,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74100 to 40309. [2020-10-13 14:55:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40309 states. [2020-10-13 14:55:43,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40309 states to 40309 states and 63619 transitions. [2020-10-13 14:55:43,975 INFO L78 Accepts]: Start accepts. Automaton has 40309 states and 63619 transitions. Word has length 74 [2020-10-13 14:55:43,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:55:43,976 INFO L479 AbstractCegarLoop]: Abstraction has 40309 states and 63619 transitions. [2020-10-13 14:55:43,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:55:43,976 INFO L276 IsEmpty]: Start isEmpty. Operand 40309 states and 63619 transitions. [2020-10-13 14:55:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 14:55:43,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:43,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:55:43,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:55:43,977 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:43,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash -174904528, now seen corresponding path program 1 times [2020-10-13 14:55:43,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:43,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555803461] [2020-10-13 14:55:43,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:44,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:44,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:44,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:44,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:44,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:44,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:44,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:48,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:48,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 14:55:48,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:55:48,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:55:48,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:48,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:55:48,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 14:55:48,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:55:48,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:49,212 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:55:49,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:55:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:49,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:49,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:49,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:55:49,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:55:49,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:55:49,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:49,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:55:49,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:55:49,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:55:49,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:55:49,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555803461] [2020-10-13 14:55:49,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:55:49,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:55:49,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313817519] [2020-10-13 14:55:49,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:55:49,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:55:49,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:55:49,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:55:49,240 INFO L87 Difference]: Start difference. First operand 40309 states and 63619 transitions. Second operand 5 states. [2020-10-13 14:55:53,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:55:53,143 INFO L93 Difference]: Finished difference Result 69339 states and 108819 transitions. [2020-10-13 14:55:53,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:55:53,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-13 14:55:53,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:55:53,239 INFO L225 Difference]: With dead ends: 69339 [2020-10-13 14:55:53,239 INFO L226 Difference]: Without dead ends: 69337 [2020-10-13 14:55:53,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:55:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69337 states. [2020-10-13 14:55:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69337 to 41173. [2020-10-13 14:55:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41173 states. [2020-10-13 14:55:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41173 states to 41173 states and 64474 transitions. [2020-10-13 14:55:55,693 INFO L78 Accepts]: Start accepts. Automaton has 41173 states and 64474 transitions. Word has length 75 [2020-10-13 14:55:55,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:55:55,694 INFO L479 AbstractCegarLoop]: Abstraction has 41173 states and 64474 transitions. [2020-10-13 14:55:55,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:55:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 41173 states and 64474 transitions. [2020-10-13 14:55:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 14:55:55,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:55,697 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:55:55,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:55:55,698 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:55,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:55,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1104173207, now seen corresponding path program 1 times [2020-10-13 14:55:55,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:55,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126966635] [2020-10-13 14:55:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:55,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:55,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:55,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:55,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:55,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:55,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:55,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:55,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:59,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:59,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:00,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:00,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 14:56:00,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:56:00,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:56:00,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:00,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:56:00,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:56:00,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 14:56:00,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:00,929 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:56:00,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:00,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:00,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:00,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:00,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:00,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:56:00,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:00,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:00,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:00,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:00,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 14:56:00,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126966635] [2020-10-13 14:56:00,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:00,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:56:00,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210836647] [2020-10-13 14:56:00,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:56:00,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:00,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:56:00,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:56:00,956 INFO L87 Difference]: Start difference. First operand 41173 states and 64474 transitions. Second operand 5 states. [2020-10-13 14:56:05,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:05,741 INFO L93 Difference]: Finished difference Result 120862 states and 189047 transitions. [2020-10-13 14:56:05,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:56:05,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-13 14:56:05,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:05,845 INFO L225 Difference]: With dead ends: 120862 [2020-10-13 14:56:05,845 INFO L226 Difference]: Without dead ends: 79702 [2020-10-13 14:56:05,894 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 14:56:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79702 states. [2020-10-13 14:56:10,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79702 to 79700. [2020-10-13 14:56:10,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79700 states. [2020-10-13 14:56:10,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79700 states to 79700 states and 123807 transitions. [2020-10-13 14:56:10,344 INFO L78 Accepts]: Start accepts. Automaton has 79700 states and 123807 transitions. Word has length 99 [2020-10-13 14:56:10,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:10,345 INFO L479 AbstractCegarLoop]: Abstraction has 79700 states and 123807 transitions. [2020-10-13 14:56:10,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:56:10,345 INFO L276 IsEmpty]: Start isEmpty. Operand 79700 states and 123807 transitions. [2020-10-13 14:56:10,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 14:56:10,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:10,350 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:10,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:56:10,351 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:10,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:10,351 INFO L82 PathProgramCache]: Analyzing trace with hash 329039887, now seen corresponding path program 1 times [2020-10-13 14:56:10,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:10,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348723515] [2020-10-13 14:56:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:10,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:10,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:11,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:11,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:11,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:11,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:11,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:13,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:13,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:15,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:15,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 14:56:15,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:56:15,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:56:15,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:15,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:15,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 14:56:15,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 14:56:15,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:56:15,596 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:56:15,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:15,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:15,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:15,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:15,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:15,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:56:15,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:15,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:15,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:15,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:15,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 14:56:15,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348723515] [2020-10-13 14:56:15,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:15,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:15,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031557208] [2020-10-13 14:56:15,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:15,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:15,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:15,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:15,630 INFO L87 Difference]: Start difference. First operand 79700 states and 123807 transitions. Second operand 4 states. [2020-10-13 14:56:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:22,365 INFO L93 Difference]: Finished difference Result 192648 states and 300733 transitions. [2020-10-13 14:56:22,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:56:22,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-13 14:56:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:22,514 INFO L225 Difference]: With dead ends: 192648 [2020-10-13 14:56:22,514 INFO L226 Difference]: Without dead ends: 113067 [2020-10-13 14:56:22,574 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 14:56:22,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113067 states. [2020-10-13 14:56:30,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113067 to 109815. [2020-10-13 14:56:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109815 states. [2020-10-13 14:56:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109815 states to 109815 states and 169843 transitions. [2020-10-13 14:56:30,594 INFO L78 Accepts]: Start accepts. Automaton has 109815 states and 169843 transitions. Word has length 100 [2020-10-13 14:56:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:30,594 INFO L479 AbstractCegarLoop]: Abstraction has 109815 states and 169843 transitions. [2020-10-13 14:56:30,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:56:30,595 INFO L276 IsEmpty]: Start isEmpty. Operand 109815 states and 169843 transitions. [2020-10-13 14:56:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 14:56:30,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:30,599 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:30,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:56:30,600 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:30,600 INFO L82 PathProgramCache]: Analyzing trace with hash 253892051, now seen corresponding path program 1 times [2020-10-13 14:56:30,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:30,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933547112] [2020-10-13 14:56:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:30,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:30,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:30,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:30,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:30,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:30,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:31,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:31,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:33,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:33,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:33,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:33,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:35,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:35,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 14:56:35,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:56:35,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:56:35,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:35,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:35,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:56:35,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:56:35,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:35,807 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:56:35,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:35,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:35,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:35,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:35,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:35,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:56:35,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:35,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:35,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:35,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:35,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 14:56:35,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933547112] [2020-10-13 14:56:35,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:35,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:35,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495016160] [2020-10-13 14:56:35,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:35,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:35,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:35,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:35,831 INFO L87 Difference]: Start difference. First operand 109815 states and 169843 transitions. Second operand 4 states. [2020-10-13 14:56:50,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:50,390 INFO L93 Difference]: Finished difference Result 329399 states and 509459 transitions. [2020-10-13 14:56:50,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:56:50,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-13 14:56:50,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:50,705 INFO L225 Difference]: With dead ends: 329399 [2020-10-13 14:56:50,706 INFO L226 Difference]: Without dead ends: 219616 [2020-10-13 14:56:50,784 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 14:56:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219616 states. [2020-10-13 14:57:01,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219616 to 109817. [2020-10-13 14:57:01,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109817 states. [2020-10-13 14:57:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109817 states to 109817 states and 169845 transitions. [2020-10-13 14:57:01,500 INFO L78 Accepts]: Start accepts. Automaton has 109817 states and 169845 transitions. Word has length 100 [2020-10-13 14:57:01,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:01,500 INFO L479 AbstractCegarLoop]: Abstraction has 109817 states and 169845 transitions. [2020-10-13 14:57:01,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:01,500 INFO L276 IsEmpty]: Start isEmpty. Operand 109817 states and 169845 transitions. [2020-10-13 14:57:01,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 14:57:01,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:01,504 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:01,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:57:01,505 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:01,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:01,505 INFO L82 PathProgramCache]: Analyzing trace with hash 783372000, now seen corresponding path program 1 times [2020-10-13 14:57:01,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:01,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129240432] [2020-10-13 14:57:01,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:01,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:01,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:01,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:01,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:01,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:01,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:01,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:01,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:02,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:05,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:05,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:05,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:07,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:07,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 14:57:07,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:57:07,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6063 [2020-10-13 14:57:07,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:07,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:07,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-13 14:57:07,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:57:07,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:07,803 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:07,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:07,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:07,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:07,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:07,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:07,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:07,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:07,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:07,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:07,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:07,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:07,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129240432] [2020-10-13 14:57:07,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:07,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:07,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555812385] [2020-10-13 14:57:07,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:07,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:07,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:07,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:07,830 INFO L87 Difference]: Start difference. First operand 109817 states and 169845 transitions. Second operand 4 states. [2020-10-13 14:57:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:14,212 INFO L93 Difference]: Finished difference Result 197315 states and 305292 transitions. [2020-10-13 14:57:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:14,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-13 14:57:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:14,310 INFO L225 Difference]: With dead ends: 197315 [2020-10-13 14:57:14,311 INFO L226 Difference]: Without dead ends: 87663 [2020-10-13 14:57:14,363 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 14:57:14,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87663 states. [2020-10-13 14:57:20,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87663 to 87544. [2020-10-13 14:57:20,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87544 states. [2020-10-13 14:57:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87544 states to 87544 states and 134604 transitions. [2020-10-13 14:57:20,373 INFO L78 Accepts]: Start accepts. Automaton has 87544 states and 134604 transitions. Word has length 101 [2020-10-13 14:57:20,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:20,373 INFO L479 AbstractCegarLoop]: Abstraction has 87544 states and 134604 transitions. [2020-10-13 14:57:20,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 87544 states and 134604 transitions. [2020-10-13 14:57:20,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 14:57:20,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:20,377 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:20,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:57:20,377 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:20,377 INFO L82 PathProgramCache]: Analyzing trace with hash -154674818, now seen corresponding path program 1 times [2020-10-13 14:57:20,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:20,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263210986] [2020-10-13 14:57:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:20,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:21,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:21,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:25,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 14:57:25,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:57:25,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:57:25,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:25,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:25,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 14:57:25,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:57:25,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:25,617 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:25,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:25,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:25,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:25,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:25,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:25,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:25,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:25,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:25,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:25,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:25,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:25,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263210986] [2020-10-13 14:57:25,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:25,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:25,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922951862] [2020-10-13 14:57:25,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:25,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:25,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:25,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:25,650 INFO L87 Difference]: Start difference. First operand 87544 states and 134604 transitions. Second operand 4 states. [2020-10-13 14:57:30,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:30,208 INFO L93 Difference]: Finished difference Result 125308 states and 193156 transitions. [2020-10-13 14:57:30,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:30,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-13 14:57:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:30,258 INFO L225 Difference]: With dead ends: 125308 [2020-10-13 14:57:30,259 INFO L226 Difference]: Without dead ends: 37929 [2020-10-13 14:57:30,328 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 14:57:30,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37929 states. [2020-10-13 14:57:32,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37929 to 26315. [2020-10-13 14:57:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26315 states. [2020-10-13 14:57:32,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26315 states to 26315 states and 40633 transitions. [2020-10-13 14:57:32,425 INFO L78 Accepts]: Start accepts. Automaton has 26315 states and 40633 transitions. Word has length 101 [2020-10-13 14:57:32,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:32,425 INFO L479 AbstractCegarLoop]: Abstraction has 26315 states and 40633 transitions. [2020-10-13 14:57:32,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:32,425 INFO L276 IsEmpty]: Start isEmpty. Operand 26315 states and 40633 transitions. [2020-10-13 14:57:32,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 14:57:32,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:32,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:32,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:57:32,428 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:32,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:32,428 INFO L82 PathProgramCache]: Analyzing trace with hash 672329873, now seen corresponding path program 1 times [2020-10-13 14:57:32,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:32,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924295485] [2020-10-13 14:57:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:32,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:34,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:34,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:37,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:37,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 14:57:37,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:57:37,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:57:37,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:37,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:37,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:57:37,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 14:57:37,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:37,693 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:37,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:37,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:37,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:37,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:37,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:37,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:57:37,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:37,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:37,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:37,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:37,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 14:57:37,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924295485] [2020-10-13 14:57:37,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:37,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:37,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82293196] [2020-10-13 14:57:37,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:37,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:37,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:37,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:37,726 INFO L87 Difference]: Start difference. First operand 26315 states and 40633 transitions. Second operand 5 states. [2020-10-13 14:57:43,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:43,014 INFO L93 Difference]: Finished difference Result 77247 states and 119185 transitions. [2020-10-13 14:57:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:43,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-10-13 14:57:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:43,076 INFO L225 Difference]: With dead ends: 77247 [2020-10-13 14:57:43,076 INFO L226 Difference]: Without dead ends: 50966 [2020-10-13 14:57:43,102 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 14:57:43,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50966 states. [2020-10-13 14:57:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50966 to 50964. [2020-10-13 14:57:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50964 states. [2020-10-13 14:57:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50964 states to 50964 states and 78002 transitions. [2020-10-13 14:57:47,724 INFO L78 Accepts]: Start accepts. Automaton has 50964 states and 78002 transitions. Word has length 102 [2020-10-13 14:57:47,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:47,725 INFO L479 AbstractCegarLoop]: Abstraction has 50964 states and 78002 transitions. [2020-10-13 14:57:47,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand 50964 states and 78002 transitions. [2020-10-13 14:57:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 14:57:47,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:47,728 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:47,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:57:47,728 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:47,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:47,728 INFO L82 PathProgramCache]: Analyzing trace with hash 657833001, now seen corresponding path program 1 times [2020-10-13 14:57:47,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:47,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238778718] [2020-10-13 14:57:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:47,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:47,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:48,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:48,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:50,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:50,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:52,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:52,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 14:57:52,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:57:52,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:57:52,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:52,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:52,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:57:52,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 14:57:52,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:53,002 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:53,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:53,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:53,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:53,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:53,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:53,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:57:53,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:53,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:53,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:53,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:53,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 14:57:53,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238778718] [2020-10-13 14:57:53,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:53,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:53,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66274232] [2020-10-13 14:57:53,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:53,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:53,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:53,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:53,036 INFO L87 Difference]: Start difference. First operand 50964 states and 78002 transitions. Second operand 5 states.