/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/array-fpi/res1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:07:35,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:07:35,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:07:35,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:07:35,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:07:35,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:07:35,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:07:35,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:07:35,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:07:35,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:07:35,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:07:35,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:07:35,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:07:35,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:07:35,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:07:35,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:07:35,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:07:35,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:07:35,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:07:35,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:07:35,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:07:35,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:07:35,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:07:35,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:07:35,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:07:35,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:07:35,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:07:35,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:07:35,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:07:35,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:07:35,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:07:35,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:07:35,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:07:35,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:07:35,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:07:35,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:07:35,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:07:35,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:07:35,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:07:35,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:07:35,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:07:35,972 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 05:07:36,007 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:07:36,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:07:36,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:07:36,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:07:36,010 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:07:36,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:07:36,011 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:07:36,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:07:36,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:07:36,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:07:36,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:07:36,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:07:36,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:07:36,013 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:07:36,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:07:36,013 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:07:36,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:07:36,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:07:36,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:07:36,014 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:07:36,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:07:36,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:07:36,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:07:36,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:07:36,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:07:36,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:07:36,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:07:36,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:07:36,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:07:36,016 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 05:07:36,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:07:36,350 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:07:36,354 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:07:36,356 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:07:36,356 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:07:36,357 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1.c [2020-10-13 05:07:36,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76ee9e50d/7a507ed2769448ceb7b162874300fcd4/FLAGa7734d721 [2020-10-13 05:07:36,862 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:07:36,862 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res1.c [2020-10-13 05:07:36,869 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76ee9e50d/7a507ed2769448ceb7b162874300fcd4/FLAGa7734d721 [2020-10-13 05:07:37,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76ee9e50d/7a507ed2769448ceb7b162874300fcd4 [2020-10-13 05:07:37,249 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:07:37,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:07:37,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:07:37,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:07:37,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:07:37,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:07:37" (1/1) ... [2020-10-13 05:07:37,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ae8ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:37, skipping insertion in model container [2020-10-13 05:07:37,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:07:37" (1/1) ... [2020-10-13 05:07:37,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:07:37,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:07:37,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:07:37,489 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:07:37,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:07:37,523 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:07:37,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:37 WrapperNode [2020-10-13 05:07:37,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:07:37,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:07:37,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:07:37,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:07:37,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:37" (1/1) ... [2020-10-13 05:07:37,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:37" (1/1) ... [2020-10-13 05:07:37,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:37" (1/1) ... [2020-10-13 05:07:37,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:37" (1/1) ... [2020-10-13 05:07:37,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:37" (1/1) ... [2020-10-13 05:07:37,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:37" (1/1) ... [2020-10-13 05:07:37,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:37" (1/1) ... [2020-10-13 05:07:37,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:07:37,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:07:37,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:07:37,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:07:37,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:37" (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 05:07:37,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:07:37,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:07:37,725 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:07:37,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:07:37,726 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:07:37,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:07:37,727 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:07:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:07:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:07:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:07:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:07:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:07:37,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:07:37,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:07:37,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:07:37,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:07:37,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:07:37,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:07:37,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:07:37,990 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:07:37,991 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 05:07:37,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:07:37 BoogieIcfgContainer [2020-10-13 05:07:37,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:07:37,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:07:37,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:07:38,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:07:38,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:07:37" (1/3) ... [2020-10-13 05:07:38,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@353051d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:07:38, skipping insertion in model container [2020-10-13 05:07:38,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:07:37" (2/3) ... [2020-10-13 05:07:38,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@353051d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:07:38, skipping insertion in model container [2020-10-13 05:07:38,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:07:37" (3/3) ... [2020-10-13 05:07:38,005 INFO L109 eAbstractionObserver]: Analyzing ICFG res1.c [2020-10-13 05:07:38,020 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:07:38,032 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:07:38,052 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:07:38,078 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:07:38,078 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:07:38,078 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:07:38,079 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:07:38,079 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:07:38,079 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:07:38,079 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:07:38,079 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:07:38,100 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-13 05:07:38,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 05:07:38,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:38,107 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] [2020-10-13 05:07:38,107 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:38,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1562148239, now seen corresponding path program 1 times [2020-10-13 05:07:38,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:38,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350264411] [2020-10-13 05:07:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:38,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:38,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:39,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 05:07:39,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:07:39,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1083 [2020-10-13 05:07:39,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:39,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:39,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 05:07:39,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:39,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:07:39,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:39,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:39,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:39,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:39,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:07:39,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:39,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:39,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:39,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:39,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:39,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:07:39,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:39,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:39,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:39,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 05:07:39,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:39,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:39,413 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 05:07:39,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350264411] [2020-10-13 05:07:39,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:39,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:07:39,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424533106] [2020-10-13 05:07:39,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:07:39,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:39,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:07:39,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:07:39,439 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-13 05:07:39,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:39,547 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2020-10-13 05:07:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:07:39,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-13 05:07:39,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:39,560 INFO L225 Difference]: With dead ends: 64 [2020-10-13 05:07:39,560 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 05:07:39,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:07:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 05:07:39,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-13 05:07:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 05:07:39,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-13 05:07:39,612 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-10-13 05:07:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:39,613 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-13 05:07:39,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:07:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-13 05:07:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 05:07:39,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:39,615 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] [2020-10-13 05:07:39,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:07:39,615 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:39,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:39,616 INFO L82 PathProgramCache]: Analyzing trace with hash 369304979, now seen corresponding path program 1 times [2020-10-13 05:07:39,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:39,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043614210] [2020-10-13 05:07:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:39,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:39,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:40,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 05:07:40,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:07:40,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-10-13 05:07:40,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:40,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:07:40,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:07:40,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:07:40,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:40,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:40,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:40,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:40,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:40,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:40,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:40,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:40,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:40,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:40,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:40,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:40,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:40,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:40,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:40,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:07:40,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:40,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:07:40,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:40,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:07:40,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:40,286 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 05:07:40,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043614210] [2020-10-13 05:07:40,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:07:40,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:07:40,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717063844] [2020-10-13 05:07:40,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:07:40,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:40,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:07:40,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:07:40,290 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-10-13 05:07:40,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:40,431 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-13 05:07:40,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:07:40,431 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-13 05:07:40,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:40,433 INFO L225 Difference]: With dead ends: 53 [2020-10-13 05:07:40,433 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 05:07:40,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:07:40,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 05:07:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-10-13 05:07:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 05:07:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-13 05:07:40,443 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2020-10-13 05:07:40,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:40,443 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-13 05:07:40,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:07:40,444 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-13 05:07:40,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 05:07:40,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:40,445 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] [2020-10-13 05:07:40,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:07:40,446 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:40,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:40,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1815337701, now seen corresponding path program 1 times [2020-10-13 05:07:40,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:40,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564287115] [2020-10-13 05:07:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:40,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:40,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:41,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:41,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:41,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:41,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:42,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:43,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:43,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:43,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:43,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:43,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:43,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:43,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 05:07:43,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:07:43,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3291 [2020-10-13 05:07:43,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:07:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:07:43,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:44,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:44,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:44,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:44,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:44,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:44,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:44,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:44,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:44,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:44,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:44,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:44,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:44,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:44,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:44,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:44,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:44,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:44,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:44,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:07:44,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564287115] [2020-10-13 05:07:44,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:44,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:07:44,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198103027] [2020-10-13 05:07:44,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:07:44,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:44,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:07:44,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:07:44,152 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 14 states. [2020-10-13 05:07:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:44,894 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-13 05:07:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:07:44,895 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-13 05:07:44,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:44,897 INFO L225 Difference]: With dead ends: 48 [2020-10-13 05:07:44,897 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 05:07:44,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:07:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 05:07:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-13 05:07:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 05:07:44,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-13 05:07:44,921 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 33 [2020-10-13 05:07:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:44,922 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-13 05:07:44,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:07:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-13 05:07:44,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:07:44,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:44,924 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:44,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:07:44,925 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:44,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:44,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1714093027, now seen corresponding path program 2 times [2020-10-13 05:07:44,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:44,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56419822] [2020-10-13 05:07:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:44,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:45,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:45,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:47,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 05:07:47,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:07:47,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2335 [2020-10-13 05:07:47,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:47,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:07:47,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:07:47,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:07:47,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:47,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:47,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:47,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:47,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:47,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:47,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:47,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:47,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:47,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:47,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:47,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:47,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:47,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:47,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:47,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:07:47,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:47,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:47,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:47,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:47,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:07:47,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56419822] [2020-10-13 05:07:47,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:47,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:07:47,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966493681] [2020-10-13 05:07:47,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:07:47,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:47,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:07:47,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:07:47,371 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 8 states. [2020-10-13 05:07:47,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:47,711 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-10-13 05:07:47,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:07:47,712 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 05:07:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:47,716 INFO L225 Difference]: With dead ends: 85 [2020-10-13 05:07:47,716 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 05:07:47,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:07:47,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 05:07:47,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-13 05:07:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 05:07:47,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-13 05:07:47,739 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 35 [2020-10-13 05:07:47,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:47,740 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-13 05:07:47,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:07:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-13 05:07:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:07:47,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:47,746 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:47,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:07:47,746 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:47,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:47,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1564165921, now seen corresponding path program 3 times [2020-10-13 05:07:47,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:47,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996424027] [2020-10-13 05:07:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:47,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:47,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:49,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:49,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:49,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:50,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:51,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:51,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:51,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:51,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:52,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:52,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:52,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:52,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:07:52,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:07:52,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 05:07:52,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:52,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:07:52,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:07:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:07:52,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:07:52,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:07:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:52,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:52,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:52,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:07:52,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:52,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:52,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:52,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:52,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:52,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:52,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:07:52,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:07:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:52,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:52,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:52,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:07:52,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:07:52,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:07:52,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:52,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:07:52,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:07:52,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:07:52,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:07:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 05:07:52,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996424027] [2020-10-13 05:07:52,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:07:52,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:07:52,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360886676] [2020-10-13 05:07:52,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:07:52,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:07:52,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:07:52,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:07:52,888 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 8 states. [2020-10-13 05:07:53,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:07:53,155 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-10-13 05:07:53,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:07:53,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-13 05:07:53,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:07:53,158 INFO L225 Difference]: With dead ends: 48 [2020-10-13 05:07:53,158 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 05:07:53,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:07:53,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 05:07:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-13 05:07:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 05:07:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-13 05:07:53,174 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 39 [2020-10-13 05:07:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:07:53,176 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-13 05:07:53,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:07:53,177 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-13 05:07:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:07:53,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:07:53,180 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:07:53,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:07:53,181 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:07:53,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:07:53,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1006388061, now seen corresponding path program 4 times [2020-10-13 05:07:53,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:07:53,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033424667] [2020-10-13 05:07:53,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:07:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:07:53,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:53,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:54,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:54,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:54,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:55,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:55,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:55,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:55,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:56,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:56,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:56,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:57,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:07:58,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:07:58,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 05:07:58,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 05:07:58,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:07:58,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:07:58,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:07:58,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:07:58,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:07:58,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:07:59,529 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-13 05:07:59,717 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-13 05:07:59,883 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-13 05:08:00,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:00,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:00,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:00,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:00,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:00,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:08:00,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:00,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:00,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:00,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:00,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:08:00,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:00,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:00,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:00,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:00,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:00,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:00,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:00,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:00,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:00,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:00,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:00,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033424667] [2020-10-13 05:08:00,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:00,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:08:00,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542827194] [2020-10-13 05:08:00,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:08:00,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:00,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:08:00,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:08:00,371 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 25 states. [2020-10-13 05:08:01,502 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-10-13 05:08:01,710 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-13 05:08:01,947 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-13 05:08:02,129 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2020-10-13 05:08:02,484 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-13 05:08:02,668 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-13 05:08:03,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:03,125 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2020-10-13 05:08:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:08:03,126 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2020-10-13 05:08:03,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:03,128 INFO L225 Difference]: With dead ends: 73 [2020-10-13 05:08:03,128 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 05:08:03,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:08:03,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 05:08:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2020-10-13 05:08:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 05:08:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-10-13 05:08:03,152 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 41 [2020-10-13 05:08:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:03,152 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-10-13 05:08:03,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:08:03,153 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-10-13 05:08:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 05:08:03,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:03,154 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:03,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:08:03,154 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:03,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1702569563, now seen corresponding path program 5 times [2020-10-13 05:08:03,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:03,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11491395] [2020-10-13 05:08:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:03,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:03,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:07,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:08:07,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:08:07,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4646 [2020-10-13 05:08:07,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:07,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:08:07,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:08:07,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:08:07,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:07,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:07,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:07,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:07,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:07,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:08:07,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:07,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:07,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:07,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:07,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:08:07,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:07,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:07,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:07,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:07,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:07,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:07,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:07,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:07,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:07,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:07,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 05:08:07,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11491395] [2020-10-13 05:08:07,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:07,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:08:07,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780112752] [2020-10-13 05:08:07,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:08:07,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:07,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:08:07,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:08:07,892 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 10 states. [2020-10-13 05:08:08,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:08,137 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2020-10-13 05:08:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:08:08,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-13 05:08:08,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:08,141 INFO L225 Difference]: With dead ends: 115 [2020-10-13 05:08:08,141 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 05:08:08,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:08:08,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 05:08:08,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2020-10-13 05:08:08,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 05:08:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-10-13 05:08:08,160 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 43 [2020-10-13 05:08:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:08,161 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-10-13 05:08:08,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:08:08,162 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-10-13 05:08:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 05:08:08,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:08,163 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:08:08,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:08:08,163 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:08,164 INFO L82 PathProgramCache]: Analyzing trace with hash -840113947, now seen corresponding path program 6 times [2020-10-13 05:08:08,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:08,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69421824] [2020-10-13 05:08:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:08,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:08,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:08,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:10,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:10,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:10,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:11,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:13,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:13,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:08:13,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:08:13,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:08:13,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:13,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:08:13,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:13,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:08:13,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:13,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:13,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:13,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:13,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:13,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:13,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:13,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:13,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:13,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:13,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:13,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:13,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:13,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:13,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:13,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:13,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:13,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:08:13,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:13,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:13,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:13,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:13,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:08:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 05:08:13,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69421824] [2020-10-13 05:08:13,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:13,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:08:13,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626218657] [2020-10-13 05:08:13,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:08:13,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:13,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:08:13,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:08:13,277 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 10 states. [2020-10-13 05:08:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:13,581 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2020-10-13 05:08:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:08:13,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-13 05:08:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:13,582 INFO L225 Difference]: With dead ends: 68 [2020-10-13 05:08:13,582 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 05:08:13,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:08:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 05:08:13,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-13 05:08:13,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 05:08:13,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-13 05:08:13,599 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 43 [2020-10-13 05:08:13,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:13,604 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-13 05:08:13,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:08:13,605 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-13 05:08:13,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 05:08:13,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:13,606 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 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 05:08:13,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:08:13,606 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:13,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:13,606 INFO L82 PathProgramCache]: Analyzing trace with hash -683545557, now seen corresponding path program 7 times [2020-10-13 05:08:13,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:13,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843086623] [2020-10-13 05:08:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:13,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:13,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:14,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:15,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:15,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:16,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:17,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:17,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:18,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:18,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:18,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:08:18,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:08:18,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:08:18,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:18,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:08:18,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:18,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:08:18,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:20,337 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-13 05:08:21,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:21,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:21,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:21,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:21,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:21,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:21,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:21,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:21,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:21,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:21,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:21,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:21,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:21,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:21,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:21,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:21,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:21,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:21,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:21,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:21,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:21,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:21,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843086623] [2020-10-13 05:08:21,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:21,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:08:21,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164669439] [2020-10-13 05:08:21,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:08:21,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:21,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:08:21,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:08:21,355 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 33 states. [2020-10-13 05:08:22,615 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-10-13 05:08:23,099 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-10-13 05:08:23,519 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 92 [2020-10-13 05:08:23,773 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2020-10-13 05:08:24,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:24,583 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-10-13 05:08:24,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:08:24,584 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 49 [2020-10-13 05:08:24,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:24,586 INFO L225 Difference]: With dead ends: 87 [2020-10-13 05:08:24,586 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 05:08:24,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=337, Invalid=2419, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 05:08:24,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 05:08:24,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2020-10-13 05:08:24,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 05:08:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-13 05:08:24,598 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 49 [2020-10-13 05:08:24,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:24,598 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-13 05:08:24,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:08:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-13 05:08:24,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:08:24,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:24,600 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 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 05:08:24,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:08:24,600 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:24,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:24,600 INFO L82 PathProgramCache]: Analyzing trace with hash -688568531, now seen corresponding path program 8 times [2020-10-13 05:08:24,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:24,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942916360] [2020-10-13 05:08:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:24,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:24,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:24,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:29,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:29,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:08:29,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:08:29,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:08:29,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:29,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:08:29,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:08:29,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:08:29,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:29,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:29,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:29,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:29,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:29,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:29,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:29,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:29,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:29,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:29,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:29,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:29,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:29,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:29,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:29,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:29,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:29,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:29,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:29,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:29,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:29,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:29,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 05:08:29,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942916360] [2020-10-13 05:08:29,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:29,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:08:29,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116273711] [2020-10-13 05:08:29,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:08:29,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:29,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:08:29,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:08:29,709 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 12 states. [2020-10-13 05:08:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:30,036 INFO L93 Difference]: Finished difference Result 137 states and 150 transitions. [2020-10-13 05:08:30,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:08:30,037 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-13 05:08:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:30,038 INFO L225 Difference]: With dead ends: 137 [2020-10-13 05:08:30,038 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 05:08:30,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:08:30,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 05:08:30,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2020-10-13 05:08:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 05:08:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-13 05:08:30,061 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 51 [2020-10-13 05:08:30,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:30,062 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-13 05:08:30,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:08:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-13 05:08:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:08:30,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:30,063 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 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 05:08:30,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:08:30,064 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:30,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1049907603, now seen corresponding path program 9 times [2020-10-13 05:08:30,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:30,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722245160] [2020-10-13 05:08:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:30,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:30,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:30,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:32,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:33,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:33,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:34,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:35,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:35,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:35,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:08:35,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:08:35,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-13 05:08:35,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:35,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:08:35,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:35,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:08:35,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:35,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:35,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:35,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:35,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:35,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:35,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:35,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:35,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:35,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:35,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:35,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:35,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:35,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:35,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:08:35,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:35,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:35,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:35,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:35,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 05:08:35,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722245160] [2020-10-13 05:08:35,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:35,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:08:35,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754575056] [2020-10-13 05:08:35,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:08:35,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:35,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:08:35,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:08:35,227 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 12 states. [2020-10-13 05:08:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:08:35,592 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2020-10-13 05:08:35,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:08:35,593 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-13 05:08:35,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:08:35,594 INFO L225 Difference]: With dead ends: 80 [2020-10-13 05:08:35,594 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 05:08:35,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:08:35,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 05:08:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-13 05:08:35,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 05:08:35,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-13 05:08:35,604 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 51 [2020-10-13 05:08:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:08:35,604 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-13 05:08:35,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:08:35,605 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-13 05:08:35,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 05:08:35,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:08:35,606 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 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 05:08:35,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:08:35,606 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:08:35,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:08:35,606 INFO L82 PathProgramCache]: Analyzing trace with hash 874427315, now seen corresponding path program 10 times [2020-10-13 05:08:35,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:08:35,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174258740] [2020-10-13 05:08:35,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:08:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:35,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:36,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:36,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:36,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:37,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:37,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:38,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:39,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:39,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:39,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:40,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:40,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 05:08:40,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:08:40,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:08:40,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:40,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 05:08:40,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:08:40,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:08:40,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:41,470 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-10-13 05:08:41,616 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-13 05:08:41,942 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2020-10-13 05:08:42,123 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2020-10-13 05:08:42,327 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2020-10-13 05:08:42,545 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2020-10-13 05:08:42,784 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 76 [2020-10-13 05:08:43,002 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2020-10-13 05:08:43,231 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2020-10-13 05:08:43,464 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 74 [2020-10-13 05:08:43,665 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 68 [2020-10-13 05:08:43,956 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 79 [2020-10-13 05:08:44,192 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 84 [2020-10-13 05:08:44,448 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2020-10-13 05:08:44,660 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-13 05:08:44,905 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-10-13 05:08:45,126 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2020-10-13 05:08:46,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:08:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:46,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:46,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:46,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:08:46,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:46,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:46,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:46,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:46,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:46,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:46,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:46,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:08:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:08:46,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:08:46,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:08:46,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:08:46,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:08:46,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:08:46,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:08:46,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:08:46,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:08:46,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:08:46,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:08:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:08:46,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174258740] [2020-10-13 05:08:46,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:08:46,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 05:08:46,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85524805] [2020-10-13 05:08:46,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 05:08:46,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:08:46,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 05:08:46,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:08:46,908 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 42 states. [2020-10-13 05:08:47,116 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-13 05:08:47,565 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-13 05:08:47,909 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-13 05:08:48,283 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2020-10-13 05:08:48,511 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2020-10-13 05:08:48,718 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-13 05:08:49,268 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 98 [2020-10-13 05:08:49,489 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2020-10-13 05:08:49,708 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2020-10-13 05:08:50,184 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 79 [2020-10-13 05:08:50,579 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 75 [2020-10-13 05:08:51,141 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 87 [2020-10-13 05:08:51,614 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 81 [2020-10-13 05:08:52,384 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 109 [2020-10-13 05:08:53,234 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 110 [2020-10-13 05:08:53,920 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 109 [2020-10-13 05:08:54,667 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 86 [2020-10-13 05:08:55,040 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 94 [2020-10-13 05:08:55,858 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 94 [2020-10-13 05:08:56,257 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 102 [2020-10-13 05:08:57,165 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 89 [2020-10-13 05:08:57,441 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 83 [2020-10-13 05:08:57,846 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 71 [2020-10-13 05:08:58,317 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 104 [2020-10-13 05:08:58,620 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 63 [2020-10-13 05:08:58,947 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 93 [2020-10-13 05:08:59,183 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 55 [2020-10-13 05:08:59,813 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 130 [2020-10-13 05:09:00,060 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 57 [2020-10-13 05:09:00,372 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2020-10-13 05:09:00,587 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 54 [2020-10-13 05:09:01,100 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-13 05:09:01,545 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2020-10-13 05:09:02,011 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 59 [2020-10-13 05:09:02,321 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 64 [2020-10-13 05:09:02,602 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 57 [2020-10-13 05:09:02,915 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 57 [2020-10-13 05:09:03,187 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 55 [2020-10-13 05:09:03,558 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 48 [2020-10-13 05:09:03,899 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 49 [2020-10-13 05:09:04,315 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 60 [2020-10-13 05:09:04,788 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 62 [2020-10-13 05:09:05,020 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2020-10-13 05:09:05,257 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-10-13 05:09:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:05,319 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2020-10-13 05:09:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-13 05:09:05,320 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 57 [2020-10-13 05:09:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:05,321 INFO L225 Difference]: With dead ends: 130 [2020-10-13 05:09:05,321 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 05:09:05,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2802 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=1362, Invalid=8538, Unknown=0, NotChecked=0, Total=9900 [2020-10-13 05:09:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 05:09:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-10-13 05:09:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 05:09:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-13 05:09:05,338 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 57 [2020-10-13 05:09:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:05,338 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-13 05:09:05,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 05:09:05,339 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-13 05:09:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:09:05,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:05,340 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 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 05:09:05,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:09:05,340 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:05,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:05,340 INFO L82 PathProgramCache]: Analyzing trace with hash 445289589, now seen corresponding path program 11 times [2020-10-13 05:09:05,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:05,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738945976] [2020-10-13 05:09:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:05,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:05,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:05,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:10,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:10,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 05:09:10,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:09:10,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:09:10,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:10,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:09:10,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:09:10,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:09:10,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:10,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:10,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:10,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:10,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:10,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:10,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:10,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:10,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:10,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:10,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:10,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:10,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:10,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:10,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:10,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:10,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:10,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:09:10,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:10,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:10,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:10,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:10,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 05:09:10,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738945976] [2020-10-13 05:09:10,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:10,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:09:10,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944320321] [2020-10-13 05:09:10,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:09:10,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:10,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:09:10,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:09:10,479 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 14 states. [2020-10-13 05:09:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:10,906 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2020-10-13 05:09:10,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:09:10,906 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-13 05:09:10,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:10,907 INFO L225 Difference]: With dead ends: 134 [2020-10-13 05:09:10,907 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 05:09:10,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:09:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 05:09:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2020-10-13 05:09:10,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 05:09:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-13 05:09:10,920 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 59 [2020-10-13 05:09:10,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:10,921 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-13 05:09:10,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:09:10,921 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-13 05:09:10,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:09:10,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:10,922 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 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 05:09:10,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:09:10,922 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:10,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:10,922 INFO L82 PathProgramCache]: Analyzing trace with hash -83160075, now seen corresponding path program 12 times [2020-10-13 05:09:10,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:10,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977776978] [2020-10-13 05:09:10,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:10,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:11,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:11,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:13,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:14,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:14,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:14,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:15,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:15,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 05:09:15,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:09:15,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:09:15,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:15,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:09:15,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:09:15,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:09:15,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:16,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:16,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:16,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:16,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:16,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:16,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:16,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:16,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:16,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:16,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:16,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:16,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:16,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:16,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:16,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:16,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:16,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:16,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:16,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:16,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:16,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:16,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 05:09:16,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977776978] [2020-10-13 05:09:16,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:16,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:09:16,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363629962] [2020-10-13 05:09:16,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:09:16,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:16,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:09:16,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:09:16,076 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 14 states. [2020-10-13 05:09:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:16,778 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-10-13 05:09:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:09:16,779 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-13 05:09:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:16,779 INFO L225 Difference]: With dead ends: 92 [2020-10-13 05:09:16,780 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 05:09:16,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:09:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 05:09:16,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-13 05:09:16,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 05:09:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-13 05:09:16,808 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2020-10-13 05:09:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:16,808 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-13 05:09:16,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:09:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-13 05:09:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:09:16,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:16,810 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 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 05:09:16,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:09:16,811 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:16,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:16,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1999770427, now seen corresponding path program 13 times [2020-10-13 05:09:16,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:16,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515917769] [2020-10-13 05:09:16,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:16,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:18,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:19,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:21,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:21,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:09:21,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:09:21,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 05:09:21,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:21,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 05:09:21,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:09:21,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:09:21,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:22,594 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-13 05:09:22,780 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-13 05:09:22,939 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-13 05:09:23,077 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-13 05:09:23,235 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-13 05:09:23,405 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-13 05:09:23,726 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-13 05:09:23,911 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2020-10-13 05:09:24,118 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-13 05:09:24,334 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-10-13 05:09:24,560 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2020-10-13 05:09:24,779 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2020-10-13 05:09:25,054 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 69 [2020-10-13 05:09:25,328 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2020-10-13 05:09:25,594 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-13 05:09:25,816 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-13 05:09:26,016 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-13 05:09:26,192 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-13 05:09:26,449 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2020-10-13 05:09:26,658 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-13 05:09:26,934 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-13 05:09:27,285 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-13 05:09:29,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:29,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:29,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:29,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:29,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:29,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:29,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:29,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:29,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:29,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:29,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:29,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:29,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:29,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:29,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:29,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:29,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:09:29,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:29,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:29,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:29,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:29,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:09:29,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515917769] [2020-10-13 05:09:29,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:29,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 05:09:29,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223832634] [2020-10-13 05:09:29,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 05:09:29,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:29,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 05:09:29,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2140, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 05:09:29,596 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 49 states. [2020-10-13 05:09:30,787 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2020-10-13 05:09:31,115 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 59 [2020-10-13 05:09:31,559 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2020-10-13 05:09:31,879 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2020-10-13 05:09:32,167 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-10-13 05:09:32,574 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 68 [2020-10-13 05:09:33,033 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 75 [2020-10-13 05:09:33,557 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 73 [2020-10-13 05:09:34,379 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 72 [2020-10-13 05:09:34,804 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 72 [2020-10-13 05:09:35,185 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2020-10-13 05:09:35,672 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 75 [2020-10-13 05:09:36,010 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-13 05:09:36,659 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 96 [2020-10-13 05:09:37,216 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 79 [2020-10-13 05:09:37,986 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2020-10-13 05:09:38,526 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 85 [2020-10-13 05:09:38,974 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2020-10-13 05:09:39,473 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2020-10-13 05:09:39,953 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 86 [2020-10-13 05:09:40,483 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2020-10-13 05:09:40,950 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-10-13 05:09:41,542 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 84 [2020-10-13 05:09:41,793 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-13 05:09:42,190 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-10-13 05:09:42,656 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-10-13 05:09:42,973 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-10-13 05:09:43,480 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-13 05:09:43,993 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-13 05:09:45,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:45,344 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-10-13 05:09:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 05:09:45,345 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 65 [2020-10-13 05:09:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:45,346 INFO L225 Difference]: With dead ends: 101 [2020-10-13 05:09:45,347 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 05:09:45,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2103 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=848, Invalid=7708, Unknown=0, NotChecked=0, Total=8556 [2020-10-13 05:09:45,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 05:09:45,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-10-13 05:09:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 05:09:45,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-10-13 05:09:45,360 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 65 [2020-10-13 05:09:45,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:45,360 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-10-13 05:09:45,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 05:09:45,361 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-10-13 05:09:45,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 05:09:45,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:45,361 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 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 05:09:45,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:09:45,362 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:45,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:45,362 INFO L82 PathProgramCache]: Analyzing trace with hash 997714493, now seen corresponding path program 14 times [2020-10-13 05:09:45,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:45,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283646071] [2020-10-13 05:09:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:45,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:45,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:45,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:50,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:50,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 05:09:50,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:09:50,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:09:50,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:50,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:09:50,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 05:09:50,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:09:50,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:50,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:50,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:50,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:50,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:50,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:50,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:50,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:50,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:50,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:50,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:50,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:50,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:50,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:50,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:50,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:50,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:50,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:50,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:50,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:50,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 05:09:50,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283646071] [2020-10-13 05:09:50,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:50,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:09:50,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208209165] [2020-10-13 05:09:50,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:09:50,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:50,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:09:50,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:09:50,608 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 16 states. [2020-10-13 05:09:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:51,409 INFO L93 Difference]: Finished difference Result 164 states and 175 transitions. [2020-10-13 05:09:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:09:51,410 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-13 05:09:51,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:51,411 INFO L225 Difference]: With dead ends: 164 [2020-10-13 05:09:51,411 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 05:09:51,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:09:51,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 05:09:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2020-10-13 05:09:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 05:09:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-13 05:09:51,431 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 67 [2020-10-13 05:09:51,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:51,431 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-13 05:09:51,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:09:51,432 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-13 05:09:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 05:09:51,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:51,432 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 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 05:09:51,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:09:51,433 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:51,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:51,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1357942913, now seen corresponding path program 15 times [2020-10-13 05:09:51,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:51,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438447403] [2020-10-13 05:09:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:51,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:51,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:51,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:55,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:56,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:56,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:09:56,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:09:56,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:09:56,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:56,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:09:56,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 05:09:56,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:09:56,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:56,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:09:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:56,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:56,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:56,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:09:56,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:56,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:56,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:56,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:56,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:56,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:56,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:09:56,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:09:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:56,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:09:56,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:09:56,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:09:56,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:09:56,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:09:56,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:09:56,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:09:56,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:09:56,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:09:56,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:09:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-10-13 05:09:56,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438447403] [2020-10-13 05:09:56,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:09:56,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:09:56,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019755871] [2020-10-13 05:09:56,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:09:56,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:09:56,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:09:56,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:09:56,664 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 16 states. [2020-10-13 05:09:57,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:09:57,485 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2020-10-13 05:09:57,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:09:57,486 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-13 05:09:57,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:09:57,487 INFO L225 Difference]: With dead ends: 92 [2020-10-13 05:09:57,487 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 05:09:57,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:09:57,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 05:09:57,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-13 05:09:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 05:09:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-10-13 05:09:57,497 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 69 [2020-10-13 05:09:57,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:09:57,497 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-10-13 05:09:57,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:09:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-10-13 05:09:57,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 05:09:57,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:09:57,498 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 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 05:09:57,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:09:57,498 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:09:57,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:09:57,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1930693315, now seen corresponding path program 16 times [2020-10-13 05:09:57,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:09:57,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504756312] [2020-10-13 05:09:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:09:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:09:57,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:00,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:02,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:02,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:02,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 05:10:02,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:10:02,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5466 [2020-10-13 05:10:02,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:02,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 05:10:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:10:03,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 05:10:03,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:03,760 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-13 05:10:03,887 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-13 05:10:04,030 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-13 05:10:04,300 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2020-10-13 05:10:04,643 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-13 05:10:04,824 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-13 05:10:04,997 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-13 05:10:05,217 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 62 [2020-10-13 05:10:05,431 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 62 [2020-10-13 05:10:05,672 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2020-10-13 05:10:05,996 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2020-10-13 05:10:06,255 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2020-10-13 05:10:06,541 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2020-10-13 05:10:06,858 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 67 [2020-10-13 05:10:07,129 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 66 [2020-10-13 05:10:07,429 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 70 [2020-10-13 05:10:07,709 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 69 [2020-10-13 05:10:08,024 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-13 05:10:08,296 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-10-13 05:10:08,608 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-10-13 05:10:08,874 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-13 05:10:09,283 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2020-10-13 05:10:09,529 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-13 05:10:09,795 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-13 05:10:10,107 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2020-10-13 05:10:10,361 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-10-13 05:10:10,667 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 79 [2020-10-13 05:10:10,930 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-13 05:10:11,213 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2020-10-13 05:10:11,447 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-13 05:10:11,737 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-13 05:10:11,963 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-13 05:10:12,189 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-13 05:10:13,403 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-13 05:10:14,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:14,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:15,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:15,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:15,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:15,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:15,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:15,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:15,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:15,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:15,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:15,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:15,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:15,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:15,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:10:15,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:15,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:15,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:15,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:15,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:10:15,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504756312] [2020-10-13 05:10:15,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:15,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 05:10:15,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13880266] [2020-10-13 05:10:15,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 05:10:15,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:15,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 05:10:15,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3087, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 05:10:15,101 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 58 states. [2020-10-13 05:10:17,778 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 60 [2020-10-13 05:10:18,158 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-13 05:10:18,579 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 63 [2020-10-13 05:10:19,800 WARN L193 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 123 [2020-10-13 05:10:20,180 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2020-10-13 05:10:20,698 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 70 [2020-10-13 05:10:21,112 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2020-10-13 05:10:21,607 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 64 [2020-10-13 05:10:22,050 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 78 [2020-10-13 05:10:22,591 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 77 [2020-10-13 05:10:23,037 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2020-10-13 05:10:23,607 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 78 [2020-10-13 05:10:24,294 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 87 [2020-10-13 05:10:25,004 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 83 [2020-10-13 05:10:25,622 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 94 [2020-10-13 05:10:26,145 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 92 [2020-10-13 05:10:26,704 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 91 [2020-10-13 05:10:28,073 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 216 DAG size of output: 81 [2020-10-13 05:10:28,830 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 82 [2020-10-13 05:10:29,140 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-13 05:10:30,055 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 119 [2020-10-13 05:10:31,323 WARN L193 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 119 [2020-10-13 05:10:32,245 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 113 [2020-10-13 05:10:34,858 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 225 DAG size of output: 138 [2020-10-13 05:10:35,293 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2020-10-13 05:10:37,033 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 178 DAG size of output: 130 [2020-10-13 05:10:38,281 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 109 [2020-10-13 05:10:38,686 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2020-10-13 05:10:39,969 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 172 DAG size of output: 118 [2020-10-13 05:10:40,967 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 99 [2020-10-13 05:10:42,217 WARN L193 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 112 [2020-10-13 05:10:43,181 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 89 [2020-10-13 05:10:44,279 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 102 [2020-10-13 05:10:45,512 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 96 [2020-10-13 05:10:46,809 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 103 [2020-10-13 05:10:48,602 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 241 DAG size of output: 100 [2020-10-13 05:10:49,371 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 113 [2020-10-13 05:10:49,984 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 112 [2020-10-13 05:10:52,356 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-10-13 05:10:53,048 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-13 05:10:53,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:53,549 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2020-10-13 05:10:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-13 05:10:53,550 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 73 [2020-10-13 05:10:53,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:53,551 INFO L225 Difference]: With dead ends: 110 [2020-10-13 05:10:53,551 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 05:10:53,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3506 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=1066, Invalid=12274, Unknown=0, NotChecked=0, Total=13340 [2020-10-13 05:10:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 05:10:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-13 05:10:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 05:10:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-13 05:10:53,567 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 73 [2020-10-13 05:10:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:53,567 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-13 05:10:53,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 05:10:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-13 05:10:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 05:10:53,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:53,568 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 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 05:10:53,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:10:53,569 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:53,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:53,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1353818299, now seen corresponding path program 17 times [2020-10-13 05:10:53,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:53,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188842511] [2020-10-13 05:10:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:53,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:53,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:57,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:57,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:58,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:58,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 05:10:58,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:10:58,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-13 05:10:58,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:58,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:10:58,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:10:58,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:10:58,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:58,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:10:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:58,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:58,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:58,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:10:58,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:58,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:10:58,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:58,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:58,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:58,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:58,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:58,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:10:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:58,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:58,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:10:58,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:10:58,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:10:58,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:10:58,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:10:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:10:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:10:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:10:58,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:10:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 05:10:58,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188842511] [2020-10-13 05:10:58,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:10:58,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:10:58,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626693776] [2020-10-13 05:10:58,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:10:58,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:10:58,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:10:58,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:10:58,955 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 18 states. [2020-10-13 05:10:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:10:59,693 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2020-10-13 05:10:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:10:59,696 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-13 05:10:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:10:59,696 INFO L225 Difference]: With dead ends: 156 [2020-10-13 05:10:59,696 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 05:10:59,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:10:59,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 05:10:59,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2020-10-13 05:10:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 05:10:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-13 05:10:59,711 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 75 [2020-10-13 05:10:59,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:10:59,712 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-13 05:10:59,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:10:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-13 05:10:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 05:10:59,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:10:59,713 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 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 05:10:59,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:10:59,714 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:10:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:10:59,714 INFO L82 PathProgramCache]: Analyzing trace with hash -36703481, now seen corresponding path program 18 times [2020-10-13 05:10:59,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:10:59,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811062012] [2020-10-13 05:10:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:10:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:10:59,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:10:59,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:04,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:04,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:05,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:05,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 05:11:05,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:11:05,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6017 [2020-10-13 05:11:05,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:05,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:11:05,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:11:05,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:11:05,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:06,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:06,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:06,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:06,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:06,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:06,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:06,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:06,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:06,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:06,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:06,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:06,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:06,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:06,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:06,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:06,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:06,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:11:06,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:06,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:06,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:06,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:06,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-13 05:11:06,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811062012] [2020-10-13 05:11:06,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:06,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:11:06,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516142122] [2020-10-13 05:11:06,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:11:06,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:06,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:11:06,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:11:06,089 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 18 states. [2020-10-13 05:11:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:07,061 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-10-13 05:11:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:11:07,063 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2020-10-13 05:11:07,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:07,064 INFO L225 Difference]: With dead ends: 102 [2020-10-13 05:11:07,064 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 05:11:07,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:11:07,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 05:11:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 05:11:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 05:11:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-13 05:11:07,078 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 77 [2020-10-13 05:11:07,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:07,078 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-13 05:11:07,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:11:07,079 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-13 05:11:07,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 05:11:07,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:07,079 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 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 05:11:07,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:11:07,080 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:07,080 INFO L82 PathProgramCache]: Analyzing trace with hash 811375179, now seen corresponding path program 19 times [2020-10-13 05:11:07,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:07,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283664904] [2020-10-13 05:11:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:07,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:10,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:12,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:12,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 05:11:12,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:11:12,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:11:12,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:12,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-13 05:11:12,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:12,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 05:11:12,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:12,593 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-13 05:11:12,708 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2020-10-13 05:11:13,109 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2020-10-13 05:11:13,253 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2020-10-13 05:11:13,444 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2020-10-13 05:11:13,661 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-13 05:11:13,936 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2020-10-13 05:11:14,203 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2020-10-13 05:11:14,469 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-13 05:11:14,785 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-13 05:11:15,080 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2020-10-13 05:11:15,362 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2020-10-13 05:11:15,591 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-13 05:11:15,857 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-13 05:11:16,243 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 69 [2020-10-13 05:11:16,630 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 69 [2020-10-13 05:11:17,081 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 69 [2020-10-13 05:11:17,540 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 70 [2020-10-13 05:11:18,088 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 72 [2020-10-13 05:11:18,615 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 74 [2020-10-13 05:11:19,094 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 77 [2020-10-13 05:11:19,596 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 72 [2020-10-13 05:11:20,096 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 75 [2020-10-13 05:11:20,542 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2020-10-13 05:11:21,056 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 83 [2020-10-13 05:11:21,573 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 85 [2020-10-13 05:11:22,049 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-13 05:11:22,526 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 85 [2020-10-13 05:11:23,094 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 85 [2020-10-13 05:11:23,836 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 102 [2020-10-13 05:11:24,393 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 90