/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:42:36,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:42:36,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:42:36,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:42:36,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:42:36,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:42:36,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:42:36,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:42:36,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:42:36,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:42:36,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:42:36,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:42:36,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:42:36,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:42:36,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:42:36,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:42:36,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:42:36,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:42:36,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:42:36,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:42:36,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:42:36,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:42:36,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:42:36,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:42:36,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:42:36,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:42:36,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:42:36,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:42:36,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:42:36,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:42:36,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:42:36,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:42:36,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:42:36,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:42:36,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:42:36,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:42:36,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:42:36,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:42:36,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:42:36,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:42:36,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:42:36,093 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 14:42:36,115 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:42:36,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:42:36,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:42:36,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:42:36,117 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:42:36,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:42:36,117 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:42:36,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:42:36,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:42:36,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:42:36,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:42:36,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:42:36,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:42:36,119 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:42:36,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:42:36,119 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:42:36,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:42:36,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:42:36,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:42:36,120 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:42:36,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:42:36,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:42:36,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:42:36,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:42:36,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:42:36,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:42:36,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:42:36,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:42:36,121 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:42:36,122 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 14:42:36,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:42:36,452 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:42:36,456 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:42:36,457 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:42:36,458 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:42:36,459 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:42:36,519 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fbce86e1f/84a0328585b14c088b5d66094876bd6d/FLAGa91872823 [2020-10-13 14:42:37,007 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:42:37,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:42:37,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fbce86e1f/84a0328585b14c088b5d66094876bd6d/FLAGa91872823 [2020-10-13 14:42:37,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fbce86e1f/84a0328585b14c088b5d66094876bd6d [2020-10-13 14:42:37,367 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:42:37,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:42:37,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:42:37,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:42:37,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:42:37,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:42:37" (1/1) ... [2020-10-13 14:42:37,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a3fa750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:42:37, skipping insertion in model container [2020-10-13 14:42:37,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:42:37" (1/1) ... [2020-10-13 14:42:37,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:42:37,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:42:37,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:42:37,872 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:42:37,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:42:38,005 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:42:38,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:42:38 WrapperNode [2020-10-13 14:42:38,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:42:38,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:42:38,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:42:38,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:42:38,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:42:38" (1/1) ... [2020-10-13 14:42:38,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:42:38" (1/1) ... [2020-10-13 14:42:38,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:42:38" (1/1) ... [2020-10-13 14:42:38,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:42:38" (1/1) ... [2020-10-13 14:42:38,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:42:38" (1/1) ... [2020-10-13 14:42:38,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:42:38" (1/1) ... [2020-10-13 14:42:38,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:42:38" (1/1) ... [2020-10-13 14:42:38,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:42:38,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:42:38,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:42:38,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:42:38,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:42:38" (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 14:42:38,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:42:38,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:42:38,144 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:42:38,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:42:38,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:42:38,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:42:38,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:42:38,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:42:38,145 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:42:38,145 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:42:38,145 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:42:38,145 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:42:38,145 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:42:38,146 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:42:38,146 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:42:38,146 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:42:38,146 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:42:38,146 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:42:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:42:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:42:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:42:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:42:38,996 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:42:38,996 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:42:39,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:42:39 BoogieIcfgContainer [2020-10-13 14:42:39,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:42:39,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:42:39,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:42:39,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:42:39,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:42:37" (1/3) ... [2020-10-13 14:42:39,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fae60b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:42:39, skipping insertion in model container [2020-10-13 14:42:39,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:42:38" (2/3) ... [2020-10-13 14:42:39,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fae60b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:42:39, skipping insertion in model container [2020-10-13 14:42:39,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:42:39" (3/3) ... [2020-10-13 14:42:39,011 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:42:39,022 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:42:39,030 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:42:39,045 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:42:39,067 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:42:39,067 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:42:39,067 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:42:39,067 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:42:39,068 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:42:39,068 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:42:39,068 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:42:39,068 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:42:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states. [2020-10-13 14:42:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:42:39,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:42:39,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:42:39,104 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:42:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:42:39,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1975084241, now seen corresponding path program 1 times [2020-10-13 14:42:39,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:42:39,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510297354] [2020-10-13 14:42:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:42:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:39,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:39,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:40,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:41,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:41,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:42:41,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:42:41,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2138 [2020-10-13 14:42:41,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:41,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:42:41,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 14:42:41,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 14:42:41,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:42:41,864 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:42:41,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:42:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:41,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:41,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:41,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:42:41,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:42:41,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 14:42:41,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:42:41,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:42:41,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:42:41,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:42:41,932 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 14:42:41,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510297354] [2020-10-13 14:42:41,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:42:41,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:42:41,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179110212] [2020-10-13 14:42:41,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:42:41,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:42:41,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:42:41,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:42:41,962 INFO L87 Difference]: Start difference. First operand 175 states. Second operand 4 states. [2020-10-13 14:42:42,189 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 14:42:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:42:43,093 INFO L93 Difference]: Finished difference Result 352 states and 574 transitions. [2020-10-13 14:42:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:42:43,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-13 14:42:43,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:42:43,130 INFO L225 Difference]: With dead ends: 352 [2020-10-13 14:42:43,131 INFO L226 Difference]: Without dead ends: 264 [2020-10-13 14:42:43,136 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 14:42:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-13 14:42:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2020-10-13 14:42:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-13 14:42:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 392 transitions. [2020-10-13 14:42:43,263 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 392 transitions. Word has length 67 [2020-10-13 14:42:43,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:42:43,264 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 392 transitions. [2020-10-13 14:42:43,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:42:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 392 transitions. [2020-10-13 14:42:43,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:42:43,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:42:43,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:42:43,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:42:43,270 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:42:43,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:42:43,270 INFO L82 PathProgramCache]: Analyzing trace with hash 836650623, now seen corresponding path program 1 times [2020-10-13 14:42:43,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:42:43,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24891574] [2020-10-13 14:42:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:42:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:43,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:43,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:44,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:44,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:42:44,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:42:44,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 894 [2020-10-13 14:42:44,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:44,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:42:44,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-13 14:42:44,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:42:44,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:42:44,433 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:42:44,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:42:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:44,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:44,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:44,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:42:44,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:42:44,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:42:44,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:44,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:42:44,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:42:44,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:42:44,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:44,464 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 14:42:44,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24891574] [2020-10-13 14:42:44,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:42:44,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:42:44,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248543005] [2020-10-13 14:42:44,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:42:44,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:42:44,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:42:44,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:42:44,469 INFO L87 Difference]: Start difference. First operand 262 states and 392 transitions. Second operand 5 states. [2020-10-13 14:42:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:42:45,117 INFO L93 Difference]: Finished difference Result 398 states and 606 transitions. [2020-10-13 14:42:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:42:45,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-13 14:42:45,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:42:45,121 INFO L225 Difference]: With dead ends: 398 [2020-10-13 14:42:45,122 INFO L226 Difference]: Without dead ends: 396 [2020-10-13 14:42:45,123 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 14:42:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-13 14:42:45,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 264. [2020-10-13 14:42:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-13 14:42:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 394 transitions. [2020-10-13 14:42:45,144 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 394 transitions. Word has length 68 [2020-10-13 14:42:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:42:45,144 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 394 transitions. [2020-10-13 14:42:45,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:42:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 394 transitions. [2020-10-13 14:42:45,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:42:45,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:42:45,146 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 14:42:45,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:42:45,147 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:42:45,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:42:45,147 INFO L82 PathProgramCache]: Analyzing trace with hash 426706407, now seen corresponding path program 1 times [2020-10-13 14:42:45,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:42:45,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948673945] [2020-10-13 14:42:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:42:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:45,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:45,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:45,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:45,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:42:45,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:42:45,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-13 14:42:45,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:45,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:42:45,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:42:45,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 14:42:45,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:42:45,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:42:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:45,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:45,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:45,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:42:45,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:42:45,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:42:45,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:45,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:42:45,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:42:45,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:42:45,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:46,011 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 14:42:46,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948673945] [2020-10-13 14:42:46,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:42:46,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:42:46,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911434664] [2020-10-13 14:42:46,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:42:46,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:42:46,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:42:46,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:42:46,016 INFO L87 Difference]: Start difference. First operand 264 states and 394 transitions. Second operand 7 states. [2020-10-13 14:42:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:42:47,446 INFO L93 Difference]: Finished difference Result 972 states and 1494 transitions. [2020-10-13 14:42:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:42:47,447 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-13 14:42:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:42:47,453 INFO L225 Difference]: With dead ends: 972 [2020-10-13 14:42:47,454 INFO L226 Difference]: Without dead ends: 770 [2020-10-13 14:42:47,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:42:47,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-10-13 14:42:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 764. [2020-10-13 14:42:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2020-10-13 14:42:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1164 transitions. [2020-10-13 14:42:47,518 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1164 transitions. Word has length 69 [2020-10-13 14:42:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:42:47,519 INFO L479 AbstractCegarLoop]: Abstraction has 764 states and 1164 transitions. [2020-10-13 14:42:47,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:42:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1164 transitions. [2020-10-13 14:42:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:42:47,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:42:47,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:42:47,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:42:47,532 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:42:47,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:42:47,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1447280351, now seen corresponding path program 1 times [2020-10-13 14:42:47,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:42:47,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962826452] [2020-10-13 14:42:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:42:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:47,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:47,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:48,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:48,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:42:48,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:42:48,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-13 14:42:48,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:48,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:42:48,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:42:48,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 14:42:48,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:48,253 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:42:48,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:42:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:48,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:48,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:48,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:42:48,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:42:48,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 14:42:48,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:48,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:42:48,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:42:48,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:42:48,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:48,305 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 14:42:48,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962826452] [2020-10-13 14:42:48,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:42:48,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:42:48,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476376894] [2020-10-13 14:42:48,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:42:48,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:42:48,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:42:48,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:42:48,318 INFO L87 Difference]: Start difference. First operand 764 states and 1164 transitions. Second operand 6 states. [2020-10-13 14:42:48,474 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 14:42:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:42:49,390 INFO L93 Difference]: Finished difference Result 2042 states and 3148 transitions. [2020-10-13 14:42:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:42:49,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-13 14:42:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:42:49,399 INFO L225 Difference]: With dead ends: 2042 [2020-10-13 14:42:49,399 INFO L226 Difference]: Without dead ends: 1328 [2020-10-13 14:42:49,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:42:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2020-10-13 14:42:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1326. [2020-10-13 14:42:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1326 states. [2020-10-13 14:42:49,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 2027 transitions. [2020-10-13 14:42:49,500 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 2027 transitions. Word has length 70 [2020-10-13 14:42:49,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:42:49,501 INFO L479 AbstractCegarLoop]: Abstraction has 1326 states and 2027 transitions. [2020-10-13 14:42:49,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:42:49,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 2027 transitions. [2020-10-13 14:42:49,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:42:49,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:42:49,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:42:49,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:42:49,503 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:42:49,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:42:49,504 INFO L82 PathProgramCache]: Analyzing trace with hash -49208001, now seen corresponding path program 1 times [2020-10-13 14:42:49,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:42:49,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789368799] [2020-10-13 14:42:49,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:42:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:49,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:49,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:49,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:49,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:42:49,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:42:49,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 444 [2020-10-13 14:42:49,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:49,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:42:49,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:42:49,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 14:42:49,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:50,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:42:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:50,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:50,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:50,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:42:50,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:42:50,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 14:42:50,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:50,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:42:50,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:42:50,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:42:50,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:50,221 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 14:42:50,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789368799] [2020-10-13 14:42:50,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:42:50,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:42:50,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133778552] [2020-10-13 14:42:50,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:42:50,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:42:50,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:42:50,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:42:50,223 INFO L87 Difference]: Start difference. First operand 1326 states and 2027 transitions. Second operand 6 states. [2020-10-13 14:42:50,367 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:42:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:42:51,207 INFO L93 Difference]: Finished difference Result 3522 states and 5429 transitions. [2020-10-13 14:42:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:42:51,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-13 14:42:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:42:51,230 INFO L225 Difference]: With dead ends: 3522 [2020-10-13 14:42:51,230 INFO L226 Difference]: Without dead ends: 2296 [2020-10-13 14:42:51,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:42:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2020-10-13 14:42:51,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2294. [2020-10-13 14:42:51,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2294 states. [2020-10-13 14:42:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 3507 transitions. [2020-10-13 14:42:51,398 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 3507 transitions. Word has length 70 [2020-10-13 14:42:51,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:42:51,398 INFO L479 AbstractCegarLoop]: Abstraction has 2294 states and 3507 transitions. [2020-10-13 14:42:51,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:42:51,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 3507 transitions. [2020-10-13 14:42:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:42:51,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:42:51,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:42:51,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:42:51,401 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:42:51,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:42:51,401 INFO L82 PathProgramCache]: Analyzing trace with hash 417966384, now seen corresponding path program 1 times [2020-10-13 14:42:51,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:42:51,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561001470] [2020-10-13 14:42:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:42:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:51,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:51,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:51,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:51,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:42:51,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:42:51,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-13 14:42:51,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:51,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:42:51,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:42:51,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 14:42:51,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:42:52,136 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:42:52,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:42:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:52,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:52,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:52,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:42:52,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:42:52,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 14:42:52,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:52,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:42:52,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:42:52,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:42:52,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:42:52,196 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 14:42:52,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561001470] [2020-10-13 14:42:52,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:42:52,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:42:52,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35285878] [2020-10-13 14:42:52,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:42:52,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:42:52,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:42:52,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:42:52,199 INFO L87 Difference]: Start difference. First operand 2294 states and 3507 transitions. Second operand 6 states. [2020-10-13 14:42:52,423 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 14:42:53,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:42:53,814 INFO L93 Difference]: Finished difference Result 6501 states and 9970 transitions. [2020-10-13 14:42:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:42:53,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-13 14:42:53,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:42:53,846 INFO L225 Difference]: With dead ends: 6501 [2020-10-13 14:42:53,846 INFO L226 Difference]: Without dead ends: 4280 [2020-10-13 14:42:53,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:42:53,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2020-10-13 14:42:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 4278. [2020-10-13 14:42:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4278 states. [2020-10-13 14:42:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4278 states to 4278 states and 6507 transitions. [2020-10-13 14:42:54,321 INFO L78 Accepts]: Start accepts. Automaton has 4278 states and 6507 transitions. Word has length 70 [2020-10-13 14:42:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:42:54,322 INFO L479 AbstractCegarLoop]: Abstraction has 4278 states and 6507 transitions. [2020-10-13 14:42:54,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:42:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4278 states and 6507 transitions. [2020-10-13 14:42:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:42:54,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:42:54,330 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 14:42:54,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:42:54,330 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:42:54,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:42:54,331 INFO L82 PathProgramCache]: Analyzing trace with hash -145855012, now seen corresponding path program 1 times [2020-10-13 14:42:54,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:42:54,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891386248] [2020-10-13 14:42:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:42:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:54,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:54,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:54,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:55,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:55,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:42:55,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:42:55,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1383 [2020-10-13 14:42:55,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:55,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:42:55,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:42:55,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 14:42:55,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:56,019 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:42:56,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:42:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:56,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:56,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:56,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:42:56,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:42:56,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:42:56,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:56,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:42:56,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:42:56,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:42:56,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:56,049 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 14:42:56,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891386248] [2020-10-13 14:42:56,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:42:56,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:42:56,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371059142] [2020-10-13 14:42:56,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:42:56,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:42:56,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:42:56,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:42:56,052 INFO L87 Difference]: Start difference. First operand 4278 states and 6507 transitions. Second operand 9 states. [2020-10-13 14:42:56,241 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:42:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:42:59,511 INFO L93 Difference]: Finished difference Result 23778 states and 36271 transitions. [2020-10-13 14:42:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:42:59,512 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-10-13 14:42:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:42:59,605 INFO L225 Difference]: With dead ends: 23778 [2020-10-13 14:42:59,605 INFO L226 Difference]: Without dead ends: 20768 [2020-10-13 14:42:59,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:42:59,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20768 states. [2020-10-13 14:43:00,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20768 to 4379. [2020-10-13 14:43:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4379 states. [2020-10-13 14:43:00,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 6640 transitions. [2020-10-13 14:43:00,222 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 6640 transitions. Word has length 71 [2020-10-13 14:43:00,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:43:00,223 INFO L479 AbstractCegarLoop]: Abstraction has 4379 states and 6640 transitions. [2020-10-13 14:43:00,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:43:00,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 6640 transitions. [2020-10-13 14:43:00,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:43:00,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:43:00,227 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 14:43:00,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:43:00,227 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:43:00,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:43:00,228 INFO L82 PathProgramCache]: Analyzing trace with hash -908233060, now seen corresponding path program 1 times [2020-10-13 14:43:00,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:43:00,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886154052] [2020-10-13 14:43:00,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:43:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:00,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:00,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:00,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:01,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:01,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:43:01,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:43:01,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1221 [2020-10-13 14:43:01,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:01,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:43:01,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:43:01,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 14:43:01,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:43:01,795 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:43:01,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:43:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:01,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:01,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:01,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:43:01,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:43:01,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:43:01,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:01,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:43:01,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:43:01,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:43:01,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:01,841 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 14:43:01,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886154052] [2020-10-13 14:43:01,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:43:01,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:43:01,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804837555] [2020-10-13 14:43:01,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:43:01,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:43:01,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:43:01,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:43:01,850 INFO L87 Difference]: Start difference. First operand 4379 states and 6640 transitions. Second operand 9 states. [2020-10-13 14:43:02,026 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-13 14:43:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:43:05,900 INFO L93 Difference]: Finished difference Result 19357 states and 29459 transitions. [2020-10-13 14:43:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 14:43:05,900 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-10-13 14:43:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:43:05,947 INFO L225 Difference]: With dead ends: 19357 [2020-10-13 14:43:05,947 INFO L226 Difference]: Without dead ends: 18195 [2020-10-13 14:43:05,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-10-13 14:43:05,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18195 states. [2020-10-13 14:43:06,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18195 to 4379. [2020-10-13 14:43:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4379 states. [2020-10-13 14:43:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 6638 transitions. [2020-10-13 14:43:06,613 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 6638 transitions. Word has length 71 [2020-10-13 14:43:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:43:06,613 INFO L479 AbstractCegarLoop]: Abstraction has 4379 states and 6638 transitions. [2020-10-13 14:43:06,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:43:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 6638 transitions. [2020-10-13 14:43:06,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:43:06,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:43:06,617 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 14:43:06,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:43:06,617 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:43:06,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:43:06,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2082083388, now seen corresponding path program 1 times [2020-10-13 14:43:06,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:43:06,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035272116] [2020-10-13 14:43:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:43:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:06,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:06,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:06,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:07,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:07,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:43:07,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:43:07,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1091 [2020-10-13 14:43:07,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:07,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:43:07,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:43:07,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:43:07,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:43:07,930 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 24 [2020-10-13 14:43:08,111 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:43:08,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:43:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:08,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:08,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:08,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:43:08,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:43:08,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:43:08,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:08,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:43:08,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:43:08,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:43:08,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:08,150 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 14:43:08,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035272116] [2020-10-13 14:43:08,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:43:08,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:43:08,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292725434] [2020-10-13 14:43:08,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:43:08,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:43:08,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:43:08,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:43:08,152 INFO L87 Difference]: Start difference. First operand 4379 states and 6638 transitions. Second operand 9 states. [2020-10-13 14:43:08,424 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-13 14:43:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:43:12,426 INFO L93 Difference]: Finished difference Result 21494 states and 32749 transitions. [2020-10-13 14:43:12,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:43:12,427 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-10-13 14:43:12,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:43:12,468 INFO L225 Difference]: With dead ends: 21494 [2020-10-13 14:43:12,468 INFO L226 Difference]: Without dead ends: 19436 [2020-10-13 14:43:12,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:43:12,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19436 states. [2020-10-13 14:43:13,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19436 to 4532. [2020-10-13 14:43:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4532 states. [2020-10-13 14:43:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4532 states to 4532 states and 6840 transitions. [2020-10-13 14:43:13,207 INFO L78 Accepts]: Start accepts. Automaton has 4532 states and 6840 transitions. Word has length 71 [2020-10-13 14:43:13,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:43:13,208 INFO L479 AbstractCegarLoop]: Abstraction has 4532 states and 6840 transitions. [2020-10-13 14:43:13,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:43:13,208 INFO L276 IsEmpty]: Start isEmpty. Operand 4532 states and 6840 transitions. [2020-10-13 14:43:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:43:13,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:43:13,212 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 14:43:13,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:43:13,213 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:43:13,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:43:13,213 INFO L82 PathProgramCache]: Analyzing trace with hash -832372705, now seen corresponding path program 1 times [2020-10-13 14:43:13,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:43:13,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833769876] [2020-10-13 14:43:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:43:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:13,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:13,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:13,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:13,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:43:13,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:43:13,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-13 14:43:13,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:43:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:43:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 14:43:13,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:13,748 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:43:13,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:43:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:13,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:13,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:13,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:43:13,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:43:13,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 14:43:13,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:13,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:43:13,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:43:13,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:43:13,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:43:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:43:13,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833769876] [2020-10-13 14:43:13,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:43:13,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:43:13,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248228166] [2020-10-13 14:43:13,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:43:13,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:43:13,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:43:13,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:43:13,809 INFO L87 Difference]: Start difference. First operand 4532 states and 6840 transitions. Second operand 6 states. [2020-10-13 14:43:14,026 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:43:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:43:16,097 INFO L93 Difference]: Finished difference Result 13119 states and 19852 transitions. [2020-10-13 14:43:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:43:16,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-13 14:43:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:43:16,114 INFO L225 Difference]: With dead ends: 13119 [2020-10-13 14:43:16,114 INFO L226 Difference]: Without dead ends: 8639 [2020-10-13 14:43:16,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:43:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8639 states. [2020-10-13 14:43:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8639 to 8637. [2020-10-13 14:43:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8637 states. [2020-10-13 14:43:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8637 states to 8637 states and 13004 transitions. [2020-10-13 14:43:17,079 INFO L78 Accepts]: Start accepts. Automaton has 8637 states and 13004 transitions. Word has length 71 [2020-10-13 14:43:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:43:17,079 INFO L479 AbstractCegarLoop]: Abstraction has 8637 states and 13004 transitions. [2020-10-13 14:43:17,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:43:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 8637 states and 13004 transitions. [2020-10-13 14:43:17,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:43:17,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:43:17,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:43:17,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:43:17,085 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:43:17,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:43:17,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1102286699, now seen corresponding path program 1 times [2020-10-13 14:43:17,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:43:17,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941634535] [2020-10-13 14:43:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:43:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:17,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:17,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:17,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:43:17,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:43:17,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-13 14:43:17,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:17,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:43:17,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:43:17,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:43:17,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:17,425 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:43:17,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:43:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:17,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:17,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:17,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:43:17,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:43:17,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:43:17,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:43:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:43:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:43:17,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:17,456 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 14:43:17,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941634535] [2020-10-13 14:43:17,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:43:17,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:43:17,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742745983] [2020-10-13 14:43:17,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:43:17,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:43:17,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:43:17,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:43:17,459 INFO L87 Difference]: Start difference. First operand 8637 states and 13004 transitions. Second operand 5 states. [2020-10-13 14:43:17,614 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:43:19,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:43:19,757 INFO L93 Difference]: Finished difference Result 22509 states and 33978 transitions. [2020-10-13 14:43:19,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:43:19,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-13 14:43:19,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:43:19,774 INFO L225 Difference]: With dead ends: 22509 [2020-10-13 14:43:19,774 INFO L226 Difference]: Without dead ends: 14971 [2020-10-13 14:43:19,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:43:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14971 states. [2020-10-13 14:43:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14971 to 14849. [2020-10-13 14:43:21,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14849 states. [2020-10-13 14:43:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14849 states to 14849 states and 22168 transitions. [2020-10-13 14:43:21,664 INFO L78 Accepts]: Start accepts. Automaton has 14849 states and 22168 transitions. Word has length 72 [2020-10-13 14:43:21,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:43:21,664 INFO L479 AbstractCegarLoop]: Abstraction has 14849 states and 22168 transitions. [2020-10-13 14:43:21,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:43:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 14849 states and 22168 transitions. [2020-10-13 14:43:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:43:21,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:43:21,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:43:21,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:43:21,670 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:43:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:43:21,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1065091068, now seen corresponding path program 1 times [2020-10-13 14:43:21,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:43:21,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160689605] [2020-10-13 14:43:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:43:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:21,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:21,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:22,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:23,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:23,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:43:23,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:43:23,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1771 [2020-10-13 14:43:23,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:23,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:43:23,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 14:43:23,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 14:43:23,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:23,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:43:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:23,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:23,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:23,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:43:23,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:43:23,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:43:23,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:23,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:43:23,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:43:23,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:43:23,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:23,624 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 14:43:23,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160689605] [2020-10-13 14:43:23,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:43:23,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:43:23,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701247897] [2020-10-13 14:43:23,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:43:23,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:43:23,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:43:23,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:43:23,629 INFO L87 Difference]: Start difference. First operand 14849 states and 22168 transitions. Second operand 4 states. [2020-10-13 14:43:23,766 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-13 14:43:26,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:43:26,652 INFO L93 Difference]: Finished difference Result 29276 states and 43786 transitions. [2020-10-13 14:43:26,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:43:26,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-13 14:43:26,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:43:26,676 INFO L225 Difference]: With dead ends: 29276 [2020-10-13 14:43:26,676 INFO L226 Difference]: Without dead ends: 21419 [2020-10-13 14:43:26,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:43:26,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21419 states. [2020-10-13 14:43:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21419 to 21185. [2020-10-13 14:43:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21185 states. [2020-10-13 14:43:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21185 states to 21185 states and 31267 transitions. [2020-10-13 14:43:29,086 INFO L78 Accepts]: Start accepts. Automaton has 21185 states and 31267 transitions. Word has length 72 [2020-10-13 14:43:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:43:29,087 INFO L479 AbstractCegarLoop]: Abstraction has 21185 states and 31267 transitions. [2020-10-13 14:43:29,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:43:29,087 INFO L276 IsEmpty]: Start isEmpty. Operand 21185 states and 31267 transitions. [2020-10-13 14:43:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:43:29,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:43:29,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:43:29,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:43:29,092 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:43:29,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:43:29,092 INFO L82 PathProgramCache]: Analyzing trace with hash -701969532, now seen corresponding path program 1 times [2020-10-13 14:43:29,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:43:29,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806015926] [2020-10-13 14:43:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:43:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:29,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:29,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:29,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:31,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:31,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:43:31,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:43:31,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2099 [2020-10-13 14:43:31,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:31,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:43:31,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 14:43:31,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:43:31,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:31,339 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:43:31,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:43:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:31,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:31,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:31,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:43:31,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:43:31,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:43:31,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:31,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:43:31,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:43:31,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:43:31,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:31,365 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 14:43:31,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806015926] [2020-10-13 14:43:31,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:43:31,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:43:31,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515076028] [2020-10-13 14:43:31,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:43:31,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:43:31,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:43:31,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:43:31,369 INFO L87 Difference]: Start difference. First operand 21185 states and 31267 transitions. Second operand 4 states. [2020-10-13 14:43:31,507 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-13 14:43:36,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:43:36,124 INFO L93 Difference]: Finished difference Result 55596 states and 82285 transitions. [2020-10-13 14:43:36,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:43:36,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-13 14:43:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:43:36,166 INFO L225 Difference]: With dead ends: 55596 [2020-10-13 14:43:36,166 INFO L226 Difference]: Without dead ends: 37614 [2020-10-13 14:43:36,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:43:36,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37614 states. [2020-10-13 14:43:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37614 to 29529. [2020-10-13 14:43:39,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29529 states. [2020-10-13 14:43:39,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29529 states to 29529 states and 43373 transitions. [2020-10-13 14:43:39,525 INFO L78 Accepts]: Start accepts. Automaton has 29529 states and 43373 transitions. Word has length 72 [2020-10-13 14:43:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:43:39,525 INFO L479 AbstractCegarLoop]: Abstraction has 29529 states and 43373 transitions. [2020-10-13 14:43:39,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:43:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 29529 states and 43373 transitions. [2020-10-13 14:43:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:43:39,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:43:39,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:43:39,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:43:39,531 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:43:39,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:43:39,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1620115166, now seen corresponding path program 1 times [2020-10-13 14:43:39,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:43:39,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65022623] [2020-10-13 14:43:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:43:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:39,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:39,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:39,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:41,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:41,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:43:41,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:43:41,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1607 [2020-10-13 14:43:41,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:41,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:43:41,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 14:43:41,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 14:43:41,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:41,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:43:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:41,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:41,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:41,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:43:41,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:43:41,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:43:41,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:41,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:43:41,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:43:41,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:43:41,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:41,308 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 14:43:41,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65022623] [2020-10-13 14:43:41,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:43:41,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:43:41,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241894991] [2020-10-13 14:43:41,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:43:41,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:43:41,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:43:41,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:43:41,310 INFO L87 Difference]: Start difference. First operand 29529 states and 43373 transitions. Second operand 4 states. [2020-10-13 14:43:41,556 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-13 14:43:46,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:43:46,442 INFO L93 Difference]: Finished difference Result 45067 states and 65933 transitions. [2020-10-13 14:43:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:43:46,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-13 14:43:46,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:43:46,478 INFO L225 Difference]: With dead ends: 45067 [2020-10-13 14:43:46,478 INFO L226 Difference]: Without dead ends: 34003 [2020-10-13 14:43:46,493 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 14:43:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34003 states. [2020-10-13 14:43:50,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34003 to 31609. [2020-10-13 14:43:50,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31609 states. [2020-10-13 14:43:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31609 states to 31609 states and 45616 transitions. [2020-10-13 14:43:50,069 INFO L78 Accepts]: Start accepts. Automaton has 31609 states and 45616 transitions. Word has length 72 [2020-10-13 14:43:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:43:50,069 INFO L479 AbstractCegarLoop]: Abstraction has 31609 states and 45616 transitions. [2020-10-13 14:43:50,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:43:50,069 INFO L276 IsEmpty]: Start isEmpty. Operand 31609 states and 45616 transitions. [2020-10-13 14:43:50,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 14:43:50,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:43:50,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:43:50,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:43:50,074 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:43:50,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:43:50,074 INFO L82 PathProgramCache]: Analyzing trace with hash -520885437, now seen corresponding path program 1 times [2020-10-13 14:43:50,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:43:50,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489263342] [2020-10-13 14:43:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:43:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:50,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:50,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:50,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:50,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:50,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:50,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:52,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:52,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 14:43:52,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:43:52,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2465 [2020-10-13 14:43:52,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:52,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:43:52,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 14:43:52,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:43:52,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:52,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:43:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:52,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:52,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:52,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:43:52,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:43:52,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:43:52,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:52,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:43:52,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:43:52,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:43:52,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:52,715 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 14:43:52,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489263342] [2020-10-13 14:43:52,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:43:52,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:43:52,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101191272] [2020-10-13 14:43:52,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:43:52,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:43:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:43:52,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:43:52,717 INFO L87 Difference]: Start difference. First operand 31609 states and 45616 transitions. Second operand 6 states. [2020-10-13 14:44:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:44:10,627 INFO L93 Difference]: Finished difference Result 163377 states and 234723 transitions. [2020-10-13 14:44:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 14:44:10,627 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-13 14:44:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:44:10,804 INFO L225 Difference]: With dead ends: 163377 [2020-10-13 14:44:10,805 INFO L226 Difference]: Without dead ends: 137706 [2020-10-13 14:44:10,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:44:10,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137706 states. [2020-10-13 14:44:15,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137706 to 31422. [2020-10-13 14:44:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31422 states. [2020-10-13 14:44:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31422 states to 31422 states and 45221 transitions. [2020-10-13 14:44:15,339 INFO L78 Accepts]: Start accepts. Automaton has 31422 states and 45221 transitions. Word has length 73 [2020-10-13 14:44:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:44:15,340 INFO L479 AbstractCegarLoop]: Abstraction has 31422 states and 45221 transitions. [2020-10-13 14:44:15,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:44:15,340 INFO L276 IsEmpty]: Start isEmpty. Operand 31422 states and 45221 transitions. [2020-10-13 14:44:15,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 14:44:15,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:44:15,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:44:15,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:44:15,344 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:44:15,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:44:15,344 INFO L82 PathProgramCache]: Analyzing trace with hash 194651613, now seen corresponding path program 1 times [2020-10-13 14:44:15,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:44:15,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497189037] [2020-10-13 14:44:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:44:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:44:15,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:15,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:15,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:15,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:15,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:15,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:17,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:44:17,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 14:44:17,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:44:17,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2405 [2020-10-13 14:44:17,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:44:17,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:44:17,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 14:44:17,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 14:44:17,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:44:17,913 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:44:17,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:44:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:44:17,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:17,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:44:17,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:44:17,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:44:17,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:44:17,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:44:17,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:44:17,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:44:17,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:44:17,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:44:17,933 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 14:44:17,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497189037] [2020-10-13 14:44:17,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:44:17,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:44:17,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403495099] [2020-10-13 14:44:17,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:44:17,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:44:17,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:44:17,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:44:17,935 INFO L87 Difference]: Start difference. First operand 31422 states and 45221 transitions. Second operand 6 states. [2020-10-13 14:44:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:44:33,742 INFO L93 Difference]: Finished difference Result 137971 states and 196323 transitions. [2020-10-13 14:44:33,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 14:44:33,742 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-13 14:44:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:44:33,882 INFO L225 Difference]: With dead ends: 137971 [2020-10-13 14:44:33,882 INFO L226 Difference]: Without dead ends: 107959 [2020-10-13 14:44:33,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:44:34,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107959 states. [2020-10-13 14:44:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107959 to 31709. [2020-10-13 14:44:38,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31709 states. [2020-10-13 14:44:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31709 states to 31709 states and 45376 transitions. [2020-10-13 14:44:38,580 INFO L78 Accepts]: Start accepts. Automaton has 31709 states and 45376 transitions. Word has length 73 [2020-10-13 14:44:38,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:44:38,581 INFO L479 AbstractCegarLoop]: Abstraction has 31709 states and 45376 transitions. [2020-10-13 14:44:38,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:44:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 31709 states and 45376 transitions. [2020-10-13 14:44:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 14:44:38,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:44:38,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:44:38,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:44:38,585 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:44:38,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:44:38,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1982309073, now seen corresponding path program 1 times [2020-10-13 14:44:38,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:44:38,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316487043] [2020-10-13 14:44:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:44:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:44:38,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:38,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:38,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:38,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:39,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:39,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:41,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:44:41,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 14:44:41,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:44:41,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2738 [2020-10-13 14:44:41,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:44:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:44:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 14:44:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:44:41,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:44:41,484 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:44:41,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:44:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:44:41,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:44:41,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:44:41,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:44:41,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:44:41,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:44:41,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:44:41,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:44:41,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:44:41,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:44:41,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:44:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:44:41,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316487043] [2020-10-13 14:44:41,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:44:41,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:44:41,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464548774] [2020-10-13 14:44:41,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:44:41,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:44:41,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:44:41,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:44:41,508 INFO L87 Difference]: Start difference. First operand 31709 states and 45376 transitions. Second operand 6 states. [2020-10-13 14:45:04,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:45:04,634 INFO L93 Difference]: Finished difference Result 189258 states and 268901 transitions. [2020-10-13 14:45:04,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 14:45:04,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-13 14:45:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:45:04,830 INFO L225 Difference]: With dead ends: 189258 [2020-10-13 14:45:04,830 INFO L226 Difference]: Without dead ends: 158969 [2020-10-13 14:45:04,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:45:04,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158969 states. [2020-10-13 14:45:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158969 to 31743. [2020-10-13 14:45:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31743 states. [2020-10-13 14:45:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31743 states to 31743 states and 45032 transitions. [2020-10-13 14:45:11,640 INFO L78 Accepts]: Start accepts. Automaton has 31743 states and 45032 transitions. Word has length 73 [2020-10-13 14:45:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:45:11,640 INFO L479 AbstractCegarLoop]: Abstraction has 31743 states and 45032 transitions. [2020-10-13 14:45:11,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:45:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 31743 states and 45032 transitions. [2020-10-13 14:45:11,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 14:45:11,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:45:11,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:45:11,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:45:11,644 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:45:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:45:11,644 INFO L82 PathProgramCache]: Analyzing trace with hash 190830705, now seen corresponding path program 1 times [2020-10-13 14:45:11,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:45:11,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092949553] [2020-10-13 14:45:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:45:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:45:11,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:11,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:11,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:11,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:11,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:12,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:12,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:15,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:45:15,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 14:45:15,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:45:15,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4051 [2020-10-13 14:45:15,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:45:15,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:45:15,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 14:45:15,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:45:15,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:45:15,841 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:45:15,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:45:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:45:15,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:15,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:45:15,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:45:15,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:45:15,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:45:15,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:45:15,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:45:15,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:45:15,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:45:15,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:45:15,858 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 14:45:15,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092949553] [2020-10-13 14:45:15,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:45:15,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:45:15,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994627660] [2020-10-13 14:45:15,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:45:15,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:45:15,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:45:15,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:45:15,860 INFO L87 Difference]: Start difference. First operand 31743 states and 45032 transitions. Second operand 6 states. [2020-10-13 14:45:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:45:29,381 INFO L93 Difference]: Finished difference Result 119169 states and 168741 transitions. [2020-10-13 14:45:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 14:45:29,382 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-13 14:45:29,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:45:29,482 INFO L225 Difference]: With dead ends: 119169 [2020-10-13 14:45:29,482 INFO L226 Difference]: Without dead ends: 88961 [2020-10-13 14:45:29,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:45:29,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88961 states. [2020-10-13 14:45:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88961 to 31573. [2020-10-13 14:45:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31573 states. [2020-10-13 14:45:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31573 states to 31573 states and 44594 transitions. [2020-10-13 14:45:34,183 INFO L78 Accepts]: Start accepts. Automaton has 31573 states and 44594 transitions. Word has length 73 [2020-10-13 14:45:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:45:34,183 INFO L479 AbstractCegarLoop]: Abstraction has 31573 states and 44594 transitions. [2020-10-13 14:45:34,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:45:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 31573 states and 44594 transitions. [2020-10-13 14:45:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 14:45:34,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:45:34,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:45:34,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:45:34,187 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:45:34,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:45:34,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1799159441, now seen corresponding path program 1 times [2020-10-13 14:45:34,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:45:34,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97775926] [2020-10-13 14:45:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:45:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:45:34,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:34,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:34,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:35,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:45:35,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 14:45:35,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:45:35,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1333 [2020-10-13 14:45:35,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:45:35,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:45:35,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 14:45:35,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:45:35,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:45:35,667 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:45:35,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:45:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:45:35,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:35,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:45:35,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:45:35,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:45:35,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:45:35,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:45:35,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:45:35,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:45:35,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:45:35,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:45:35,688 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 14:45:35,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97775926] [2020-10-13 14:45:35,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:45:35,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:45:35,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623503285] [2020-10-13 14:45:35,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:45:35,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:45:35,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:45:35,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:45:35,690 INFO L87 Difference]: Start difference. First operand 31573 states and 44594 transitions. Second operand 4 states. [2020-10-13 14:45:35,832 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-13 14:45:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:45:43,641 INFO L93 Difference]: Finished difference Result 74237 states and 105282 transitions. [2020-10-13 14:45:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:45:43,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-13 14:45:43,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:45:43,696 INFO L225 Difference]: With dead ends: 74237 [2020-10-13 14:45:43,696 INFO L226 Difference]: Without dead ends: 46817 [2020-10-13 14:45:43,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:45:43,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46817 states. [2020-10-13 14:45:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46817 to 46507. [2020-10-13 14:45:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46507 states. [2020-10-13 14:45:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46507 states to 46507 states and 64868 transitions. [2020-10-13 14:45:51,993 INFO L78 Accepts]: Start accepts. Automaton has 46507 states and 64868 transitions. Word has length 73 [2020-10-13 14:45:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:45:51,993 INFO L479 AbstractCegarLoop]: Abstraction has 46507 states and 64868 transitions. [2020-10-13 14:45:51,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:45:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 46507 states and 64868 transitions. [2020-10-13 14:45:51,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 14:45:51,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:45:51,997 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 14:45:51,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:45:51,998 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:45:51,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:45:51,998 INFO L82 PathProgramCache]: Analyzing trace with hash 422101668, now seen corresponding path program 1 times [2020-10-13 14:45:51,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:45:51,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119324205] [2020-10-13 14:45:51,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:45:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:45:52,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:52,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:53,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:45:53,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 14:45:53,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:45:53,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1245 [2020-10-13 14:45:53,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:45:53,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 14:45:53,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:45:53,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 14:45:53,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:45:53,656 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:45:53,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:45:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:45:53,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:45:53,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:45:53,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:45:53,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:45:53,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:45:53,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:45:53,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:45:53,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:45:53,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:45:53,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:45:53,683 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 14:45:53,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119324205] [2020-10-13 14:45:53,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:45:53,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-13 14:45:53,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020774659] [2020-10-13 14:45:53,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 14:45:53,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:45:53,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 14:45:53,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:45:53,685 INFO L87 Difference]: Start difference. First operand 46507 states and 64868 transitions. Second operand 10 states. [2020-10-13 14:45:53,856 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-13 14:46:20,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:46:20,330 INFO L93 Difference]: Finished difference Result 187478 states and 262493 transitions. [2020-10-13 14:46:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 14:46:20,330 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-13 14:46:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:46:20,527 INFO L225 Difference]: With dead ends: 187478 [2020-10-13 14:46:20,527 INFO L226 Difference]: Without dead ends: 147158 [2020-10-13 14:46:20,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-13 14:46:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147158 states.