/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-cav19/array_init_var_plus_ind2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:26:06,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:26:06,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:26:06,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:26:06,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:26:06,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:26:06,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:26:06,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:26:06,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:26:06,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:26:06,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:26:06,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:26:06,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:26:06,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:26:06,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:26:06,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:26:06,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:26:06,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:26:06,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:26:06,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:26:06,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:26:06,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:26:06,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:26:06,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:26:06,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:26:06,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:26:06,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:26:06,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:26:06,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:26:06,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:26:06,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:26:06,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:26:06,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:26:06,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:26:06,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:26:06,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:26:06,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:26:06,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:26:06,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:26:06,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:26:06,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:26:06,974 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 04:26:06,995 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:26:06,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:26:06,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:26:06,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:26:06,997 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:26:06,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:26:06,997 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:26:06,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:26:06,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:26:06,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:26:06,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:26:06,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:26:06,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:26:06,999 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:26:06,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:26:06,999 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:26:06,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:26:07,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:26:07,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:26:07,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:26:07,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:26:07,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:26:07,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:26:07,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:26:07,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:26:07,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:26:07,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:26:07,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:26:07,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:26:07,002 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 04:26:07,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:26:07,329 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:26:07,336 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:26:07,338 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:26:07,340 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:26:07,340 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind2.c [2020-10-13 04:26:07,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12ac37cdc/d6017cfbe01747099d3351a3d8b949b5/FLAG5fff9e536 [2020-10-13 04:26:07,856 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:26:07,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_init_var_plus_ind2.c [2020-10-13 04:26:07,863 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12ac37cdc/d6017cfbe01747099d3351a3d8b949b5/FLAG5fff9e536 [2020-10-13 04:26:08,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12ac37cdc/d6017cfbe01747099d3351a3d8b949b5 [2020-10-13 04:26:08,249 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:26:08,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:26:08,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:26:08,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:26:08,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:26:08,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@620d28a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08, skipping insertion in model container [2020-10-13 04:26:08,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:26:08,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:26:08,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:26:08,540 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:26:08,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:26:08,582 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:26:08,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08 WrapperNode [2020-10-13 04:26:08,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:26:08,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:26:08,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:26:08,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:26:08,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:26:08,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:26:08,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:26:08,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:26:08,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (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 04:26:08,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:26:08,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:26:08,772 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 04:26:08,772 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:26:08,772 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:26:08,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:26:08,774 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 04:26:08,775 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 04:26:08,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:26:08,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:26:08,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:26:08,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:26:08,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:26:08,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:26:08,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:26:08,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:26:08,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:26:09,038 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:26:09,038 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 04:26:09,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:26:09 BoogieIcfgContainer [2020-10-13 04:26:09,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:26:09,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:26:09,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:26:09,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:26:09,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:26:08" (1/3) ... [2020-10-13 04:26:09,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee298be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:26:09, skipping insertion in model container [2020-10-13 04:26:09,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (2/3) ... [2020-10-13 04:26:09,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee298be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:26:09, skipping insertion in model container [2020-10-13 04:26:09,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:26:09" (3/3) ... [2020-10-13 04:26:09,065 INFO L109 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind2.c [2020-10-13 04:26:09,080 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:26:09,088 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:26:09,102 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:26:09,138 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:26:09,138 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:26:09,138 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:26:09,138 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:26:09,138 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:26:09,139 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:26:09,139 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:26:09,139 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:26:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-13 04:26:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 04:26:09,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:09,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:09,161 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:09,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:09,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1594784639, now seen corresponding path program 1 times [2020-10-13 04:26:09,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:09,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289079776] [2020-10-13 04:26:09,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:09,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:09,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 04:26:09,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:09,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-13 04:26:09,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:09,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:26:09,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:09,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:26:09,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:26:09,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:09,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:09,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:09,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:09,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 04:26:09,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:09,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:09,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:09,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:09,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:09,821 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 04:26:09,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289079776] [2020-10-13 04:26:09,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:26:09,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 04:26:09,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416213248] [2020-10-13 04:26:09,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:26:09,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:09,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:26:09,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:26:09,854 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-10-13 04:26:10,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:10,009 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2020-10-13 04:26:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:26:10,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-13 04:26:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:10,026 INFO L225 Difference]: With dead ends: 49 [2020-10-13 04:26:10,026 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 04:26:10,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:26:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 04:26:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-13 04:26:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 04:26:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-13 04:26:10,068 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2020-10-13 04:26:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:10,069 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-13 04:26:10,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:26:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-13 04:26:10,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:26:10,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:10,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:10,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:26:10,071 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:10,071 INFO L82 PathProgramCache]: Analyzing trace with hash -973616762, now seen corresponding path program 1 times [2020-10-13 04:26:10,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:10,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492595291] [2020-10-13 04:26:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:10,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:10,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:26:10,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:10,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-13 04:26:10,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:10,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:26:10,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:10,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:26:10,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:26:10,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:10,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:10,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:10,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:10,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:10,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:10,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:10,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:10,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:10,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:10,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492595291] [2020-10-13 04:26:10,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:10,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:26:10,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894197981] [2020-10-13 04:26:10,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:26:10,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:10,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:26:10,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:26:10,477 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-13 04:26:10,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:10,556 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-13 04:26:10,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:26:10,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-13 04:26:10,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:10,558 INFO L225 Difference]: With dead ends: 38 [2020-10-13 04:26:10,558 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 04:26:10,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:26:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 04:26:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-13 04:26:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 04:26:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 04:26:10,566 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2020-10-13 04:26:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:10,566 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 04:26:10,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:26:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 04:26:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:26:10,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:10,568 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:10,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:26:10,568 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:10,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:10,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1377375713, now seen corresponding path program 2 times [2020-10-13 04:26:10,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:10,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655555706] [2020-10-13 04:26:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:10,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:11,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:26:11,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:11,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-13 04:26:11,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:11,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:11,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:26:11,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:26:11,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:11,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:11,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:11,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:11,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:11,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:26:11,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:11,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:11,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:11,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:11,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:11,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655555706] [2020-10-13 04:26:11,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:11,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:26:11,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097102534] [2020-10-13 04:26:11,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:26:11,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:11,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:26:11,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:26:11,264 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-10-13 04:26:11,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:11,432 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-13 04:26:11,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:26:11,433 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-13 04:26:11,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:11,436 INFO L225 Difference]: With dead ends: 45 [2020-10-13 04:26:11,436 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 04:26:11,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:26:11,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 04:26:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-10-13 04:26:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 04:26:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-13 04:26:11,450 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-10-13 04:26:11,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:11,451 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-13 04:26:11,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:26:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-13 04:26:11,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:26:11,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:11,452 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:11,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:26:11,453 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:11,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:11,453 INFO L82 PathProgramCache]: Analyzing trace with hash 679907117, now seen corresponding path program 1 times [2020-10-13 04:26:11,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:11,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796534683] [2020-10-13 04:26:11,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:11,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:11,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:26:11,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:11,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-13 04:26:11,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:11,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:26:11,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:11,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:26:11,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:11,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:11,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:11,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:11,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:11,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:26:11,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:11,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:11,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:11,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:11,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:11,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796534683] [2020-10-13 04:26:11,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:11,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:26:11,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152751670] [2020-10-13 04:26:11,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:26:11,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:11,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:26:11,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:26:11,807 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 11 states. [2020-10-13 04:26:12,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:12,230 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-13 04:26:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:26:12,231 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-13 04:26:12,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:12,232 INFO L225 Difference]: With dead ends: 43 [2020-10-13 04:26:12,233 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:26:12,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:26:12,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:26:12,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-10-13 04:26:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 04:26:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-13 04:26:12,243 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2020-10-13 04:26:12,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:12,243 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-13 04:26:12,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:26:12,244 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-13 04:26:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 04:26:12,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:12,245 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:12,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:26:12,245 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:12,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:12,246 INFO L82 PathProgramCache]: Analyzing trace with hash 443111142, now seen corresponding path program 3 times [2020-10-13 04:26:12,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:12,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162306177] [2020-10-13 04:26:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:12,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:13,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:13,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 04:26:13,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:26:13,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 898 [2020-10-13 04:26:13,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:13,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:26:13,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:26:13,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 04:26:13,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:13,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:13,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:13,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:13,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:13,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:13,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 04:26:13,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:13,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:13,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:13,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:13,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:13,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162306177] [2020-10-13 04:26:13,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:13,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:26:13,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898184346] [2020-10-13 04:26:13,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:26:13,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:13,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:26:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:26:13,288 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 8 states. [2020-10-13 04:26:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:13,563 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-13 04:26:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:26:13,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-13 04:26:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:13,568 INFO L225 Difference]: With dead ends: 59 [2020-10-13 04:26:13,569 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 04:26:13,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:26:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 04:26:13,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-10-13 04:26:13,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 04:26:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-13 04:26:13,587 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 22 [2020-10-13 04:26:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:13,588 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-13 04:26:13,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:26:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-13 04:26:13,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:26:13,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:13,589 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:13,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:26:13,590 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:13,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:13,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1280424774, now seen corresponding path program 2 times [2020-10-13 04:26:13,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:13,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16539516] [2020-10-13 04:26:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:13,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:13,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:13,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:13,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:26:13,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:13,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-13 04:26:13,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:13,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:26:13,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:13,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 04:26:13,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:14,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:14,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:14,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:14,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:14,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:14,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:14,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:14,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:14,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:14,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:14,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16539516] [2020-10-13 04:26:14,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:14,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:26:14,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657008348] [2020-10-13 04:26:14,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:26:14,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:14,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:26:14,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:26:14,203 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 12 states. [2020-10-13 04:26:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:14,564 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-13 04:26:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:26:14,565 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-13 04:26:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:14,566 INFO L225 Difference]: With dead ends: 57 [2020-10-13 04:26:14,566 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 04:26:14,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:26:14,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 04:26:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2020-10-13 04:26:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 04:26:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-13 04:26:14,576 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2020-10-13 04:26:14,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:14,577 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-13 04:26:14,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:26:14,577 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-13 04:26:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:26:14,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:14,578 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:14,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:26:14,579 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:14,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:14,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2014961855, now seen corresponding path program 4 times [2020-10-13 04:26:14,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:14,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298878191] [2020-10-13 04:26:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:14,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:14,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:14,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:15,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:15,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:15,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:26:15,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:26:15,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 949 [2020-10-13 04:26:15,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:15,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:26:15,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:26:15,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:26:15,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:15,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:15,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:15,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:15,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:15,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:15,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:26:15,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:15,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:15,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:15,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:15,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298878191] [2020-10-13 04:26:15,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:15,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:26:15,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705927400] [2020-10-13 04:26:15,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:26:15,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:15,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:26:15,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:26:15,634 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 9 states. [2020-10-13 04:26:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:15,898 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-10-13 04:26:15,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:26:15,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-13 04:26:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:15,901 INFO L225 Difference]: With dead ends: 69 [2020-10-13 04:26:15,901 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 04:26:15,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:26:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 04:26:15,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2020-10-13 04:26:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:26:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-13 04:26:15,921 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 25 [2020-10-13 04:26:15,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:15,922 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-13 04:26:15,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:26:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-13 04:26:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 04:26:15,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:15,924 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:15,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:26:15,924 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:15,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1531810675, now seen corresponding path program 3 times [2020-10-13 04:26:15,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:15,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191209125] [2020-10-13 04:26:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:15,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:16,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 04:26:16,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:26:16,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 914 [2020-10-13 04:26:16,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:16,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:26:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:26:16,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:17,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:17,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:17,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:17,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:17,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:17,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:17,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:17,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:17,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:17,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:17,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:17,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191209125] [2020-10-13 04:26:17,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:17,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:26:17,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112114157] [2020-10-13 04:26:17,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:26:17,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:17,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:26:17,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:26:17,148 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 15 states. [2020-10-13 04:26:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:17,606 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2020-10-13 04:26:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:26:17,606 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-13 04:26:17,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:17,608 INFO L225 Difference]: With dead ends: 67 [2020-10-13 04:26:17,608 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 04:26:17,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:26:17,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 04:26:17,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2020-10-13 04:26:17,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:26:17,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-13 04:26:17,618 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2020-10-13 04:26:17,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:17,618 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-13 04:26:17,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:26:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-13 04:26:17,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:26:17,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:17,620 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:17,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:26:17,620 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:17,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:17,621 INFO L82 PathProgramCache]: Analyzing trace with hash -91295004, now seen corresponding path program 1 times [2020-10-13 04:26:17,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:17,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778966008] [2020-10-13 04:26:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:17,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:17,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:17,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:26:17,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:17,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-13 04:26:17,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:17,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:26:17,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:17,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 04:26:17,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:17,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:17,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:17,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:17,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:17,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:17,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:17,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:17,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:17,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:17,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:17,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:17,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 04:26:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:17,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:17,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:17,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:17,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:17,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:17,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:17,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:17,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778966008] [2020-10-13 04:26:17,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:17,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:26:17,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141004310] [2020-10-13 04:26:17,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:26:17,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:17,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:26:17,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:26:17,783 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 8 states. [2020-10-13 04:26:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:17,895 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-13 04:26:17,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:26:17,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-13 04:26:17,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:17,896 INFO L225 Difference]: With dead ends: 57 [2020-10-13 04:26:17,896 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:26:17,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:26:17,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:26:17,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 04:26:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:26:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-13 04:26:17,904 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-10-13 04:26:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:17,905 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-13 04:26:17,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:26:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-13 04:26:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:26:17,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:17,906 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:17,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:26:17,907 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:17,907 INFO L82 PathProgramCache]: Analyzing trace with hash 991124550, now seen corresponding path program 5 times [2020-10-13 04:26:17,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:17,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825804507] [2020-10-13 04:26:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:17,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:18,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:18,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:18,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:18,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:19,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:19,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:26:19,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:26:19,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1080 [2020-10-13 04:26:19,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:19,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:26:19,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:26:19,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 04:26:19,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:19,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:19,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:19,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:19,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:19,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:19,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:26:19,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:19,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:19,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:19,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:19,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:19,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825804507] [2020-10-13 04:26:19,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:19,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:26:19,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950333996] [2020-10-13 04:26:19,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:26:19,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:19,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:26:19,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:26:19,087 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 10 states. [2020-10-13 04:26:19,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:19,300 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-13 04:26:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:26:19,300 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-13 04:26:19,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:19,302 INFO L225 Difference]: With dead ends: 72 [2020-10-13 04:26:19,302 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 04:26:19,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:26:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 04:26:19,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2020-10-13 04:26:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 04:26:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-13 04:26:19,311 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2020-10-13 04:26:19,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:19,312 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-13 04:26:19,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:26:19,312 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-13 04:26:19,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:26:19,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:19,313 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:19,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:26:19,313 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:19,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:19,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1088971238, now seen corresponding path program 4 times [2020-10-13 04:26:19,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:19,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171714367] [2020-10-13 04:26:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:19,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:19,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:19,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:19,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:20,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:20,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:26:20,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:26:20,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 903 [2020-10-13 04:26:20,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:20,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:26:20,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:20,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 04:26:20,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:20,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:20,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:20,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:20,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:20,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:20,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:20,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:20,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:20,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:20,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:20,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:20,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171714367] [2020-10-13 04:26:20,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:20,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:26:20,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32705735] [2020-10-13 04:26:20,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:26:20,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:20,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:26:20,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:26:20,763 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 17 states. [2020-10-13 04:26:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:21,512 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-10-13 04:26:21,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:26:21,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-10-13 04:26:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:21,514 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:26:21,514 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 04:26:21,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:26:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 04:26:21,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2020-10-13 04:26:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 04:26:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-13 04:26:21,531 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 29 [2020-10-13 04:26:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:21,533 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-13 04:26:21,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:26:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-13 04:26:21,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 04:26:21,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:21,537 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:21,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:26:21,537 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:21,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:21,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1629287933, now seen corresponding path program 2 times [2020-10-13 04:26:21,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:21,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608025052] [2020-10-13 04:26:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:21,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:21,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:21,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:21,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 04:26:21,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:21,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-13 04:26:21,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:21,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:26:21,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:21,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:26:21,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:22,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:22,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:22,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:22,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:22,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:22,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:22,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:22,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:22,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:22,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:22,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:22,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 04:26:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:22,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:22,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:22,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:22,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:22,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 04:26:22,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:22,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:22,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:22,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:26:22,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:22,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608025052] [2020-10-13 04:26:22,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:22,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:26:22,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578313728] [2020-10-13 04:26:22,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:26:22,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:22,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:26:22,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:26:22,260 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 17 states. [2020-10-13 04:26:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:22,865 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2020-10-13 04:26:22,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:26:22,866 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-10-13 04:26:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:22,867 INFO L225 Difference]: With dead ends: 63 [2020-10-13 04:26:22,867 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 04:26:22,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:26:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 04:26:22,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-10-13 04:26:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 04:26:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-13 04:26:22,878 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 31 [2020-10-13 04:26:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:22,879 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-13 04:26:22,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:26:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-13 04:26:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 04:26:22,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:22,881 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:22,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:26:22,882 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:22,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:22,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1583259809, now seen corresponding path program 6 times [2020-10-13 04:26:22,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:22,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913779333] [2020-10-13 04:26:22,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:22,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:22,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:23,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:23,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:23,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:23,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:24,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:24,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 04:26:24,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:26:24,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1286 [2020-10-13 04:26:24,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:26:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:26:24,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:26:24,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:24,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:24,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:24,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:24,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:24,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:24,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:24,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:24,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:24,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:24,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:24,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:24,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913779333] [2020-10-13 04:26:24,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:24,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:26:24,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192214212] [2020-10-13 04:26:24,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:26:24,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:24,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:26:24,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:26:24,291 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 11 states. [2020-10-13 04:26:24,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:24,544 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2020-10-13 04:26:24,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:26:24,545 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-13 04:26:24,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:24,546 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:26:24,546 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 04:26:24,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:26:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 04:26:24,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2020-10-13 04:26:24,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 04:26:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-13 04:26:24,559 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 31 [2020-10-13 04:26:24,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:24,559 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-13 04:26:24,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:26:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-13 04:26:24,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:26:24,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:24,560 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:24,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:26:24,561 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:24,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:24,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1407532563, now seen corresponding path program 5 times [2020-10-13 04:26:24,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:24,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644053572] [2020-10-13 04:26:24,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:24,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:24,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:24,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:25,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:25,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:25,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:26:25,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:26:25,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 958 [2020-10-13 04:26:25,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:26:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:26:25,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:26,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:26,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:26,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:26,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:26,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:26,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:26,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:26,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:26,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:26,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:26,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:26,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644053572] [2020-10-13 04:26:26,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:26,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:26:26,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357648721] [2020-10-13 04:26:26,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:26:26,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:26,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:26:26,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:26:26,483 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 18 states. [2020-10-13 04:26:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:28,026 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2020-10-13 04:26:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:26:28,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2020-10-13 04:26:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:28,028 INFO L225 Difference]: With dead ends: 97 [2020-10-13 04:26:28,028 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 04:26:28,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:26:28,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 04:26:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 56. [2020-10-13 04:26:28,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:26:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-13 04:26:28,052 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 32 [2020-10-13 04:26:28,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:28,053 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-13 04:26:28,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:26:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-13 04:26:28,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:26:28,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:28,056 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:28,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:26:28,057 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash -919113660, now seen corresponding path program 3 times [2020-10-13 04:26:28,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:28,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408605645] [2020-10-13 04:26:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:28,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:28,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:28,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:28,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:28,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:28,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:28,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 04:26:28,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:26:28,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-13 04:26:28,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:28,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:26:28,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:28,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:26:28,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:29,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:29,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:29,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:29,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:29,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:29,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:29,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:29,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:29,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:29,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:29,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:29,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 04:26:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:29,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:29,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:29,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:29,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:29,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 04:26:29,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:29,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:29,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:29,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:26:29,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:29,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408605645] [2020-10-13 04:26:29,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:29,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:26:29,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742655786] [2020-10-13 04:26:29,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:26:29,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:29,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:26:29,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:26:29,475 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 17 states. [2020-10-13 04:26:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:30,299 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2020-10-13 04:26:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:26:30,300 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-13 04:26:30,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:30,301 INFO L225 Difference]: With dead ends: 83 [2020-10-13 04:26:30,301 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 04:26:30,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:26:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 04:26:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2020-10-13 04:26:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 04:26:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-13 04:26:30,322 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 34 [2020-10-13 04:26:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:30,323 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-13 04:26:30,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:26:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-13 04:26:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:26:30,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:30,325 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:30,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:26:30,326 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:30,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:30,326 INFO L82 PathProgramCache]: Analyzing trace with hash 163305894, now seen corresponding path program 7 times [2020-10-13 04:26:30,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:30,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596118362] [2020-10-13 04:26:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:30,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:30,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:30,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:30,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:31,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:31,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:31,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:32,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 04:26:32,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:26:32,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1715 [2020-10-13 04:26:32,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:32,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:26:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:26:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:26:32,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:32,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:32,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:32,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:32,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:32,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:32,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:32,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:32,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:32,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:32,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:32,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596118362] [2020-10-13 04:26:32,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:32,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:26:32,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091356912] [2020-10-13 04:26:32,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:26:32,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:32,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:26:32,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:26:32,165 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 12 states. [2020-10-13 04:26:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:32,485 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2020-10-13 04:26:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:26:32,485 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-13 04:26:32,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:32,487 INFO L225 Difference]: With dead ends: 106 [2020-10-13 04:26:32,487 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 04:26:32,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:26:32,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 04:26:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2020-10-13 04:26:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 04:26:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-10-13 04:26:32,510 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 34 [2020-10-13 04:26:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:32,511 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-10-13 04:26:32,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:26:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-10-13 04:26:32,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:26:32,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:32,512 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:32,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:26:32,512 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1196396678, now seen corresponding path program 6 times [2020-10-13 04:26:32,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:32,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195580504] [2020-10-13 04:26:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:32,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:33,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:33,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:34,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:34,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:26:34,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:26:34,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1692 [2020-10-13 04:26:34,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:34,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:26:34,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:34,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 04:26:34,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:34,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:34,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:34,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:34,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:34,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:34,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:34,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:34,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:34,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:34,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:34,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 3 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:34,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195580504] [2020-10-13 04:26:34,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:34,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:26:34,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896507988] [2020-10-13 04:26:34,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:26:34,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:34,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:26:34,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:26:34,927 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 21 states. [2020-10-13 04:26:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:36,432 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-10-13 04:26:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:26:36,433 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-13 04:26:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:36,434 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:26:36,434 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 04:26:36,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:26:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 04:26:36,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 73. [2020-10-13 04:26:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 04:26:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2020-10-13 04:26:36,465 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 35 [2020-10-13 04:26:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:36,465 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2020-10-13 04:26:36,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:26:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2020-10-13 04:26:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:26:36,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:36,466 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:36,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:26:36,466 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:36,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:36,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1785920669, now seen corresponding path program 4 times [2020-10-13 04:26:36,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:36,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221833784] [2020-10-13 04:26:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:36,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:36,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:36,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:36,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:37,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:37,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:37,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:37,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:38,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:38,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:26:38,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:26:38,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1926 [2020-10-13 04:26:38,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:38,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:26:38,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:38,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:26:38,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:38,972 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-13 04:26:39,114 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-13 04:26:39,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:39,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:39,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:39,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:39,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:39,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:39,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:39,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:39,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:39,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:39,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:39,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 04:26:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:39,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:39,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:39,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:39,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:39,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 04:26:39,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:39,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:39,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:39,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:26:39,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:39,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221833784] [2020-10-13 04:26:39,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:39,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:26:39,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977598596] [2020-10-13 04:26:39,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:26:39,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:39,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:26:39,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:26:39,691 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 20 states. [2020-10-13 04:26:40,088 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-13 04:26:40,392 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-13 04:26:40,965 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-13 04:26:41,504 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-13 04:26:41,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:41,793 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2020-10-13 04:26:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:26:41,793 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-10-13 04:26:41,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:41,794 INFO L225 Difference]: With dead ends: 108 [2020-10-13 04:26:41,795 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 04:26:41,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:26:41,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 04:26:41,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 76. [2020-10-13 04:26:41,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:26:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-10-13 04:26:41,822 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 37 [2020-10-13 04:26:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:41,823 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-10-13 04:26:41,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:26:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-10-13 04:26:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:26:41,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:41,824 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:41,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:26:41,824 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:41,824 INFO L82 PathProgramCache]: Analyzing trace with hash -117864012, now seen corresponding path program 5 times [2020-10-13 04:26:41,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:41,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501629898] [2020-10-13 04:26:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:41,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:41,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:41,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 04:26:41,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:41,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-13 04:26:41,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:41,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:26:41,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:41,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:26:41,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:41,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:41,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:41,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:41,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:41,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:41,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:41,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:41,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:41,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:41,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:41,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:41,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 04:26:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:41,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:41,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:41,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:41,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:41,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:41,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:41,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:41,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:41,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:41,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:41,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-13 04:26:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:42,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:42,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:42,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:42,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:42,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:42,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:42,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:42,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:42,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:42,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:26:42,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501629898] [2020-10-13 04:26:42,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:42,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:26:42,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363504939] [2020-10-13 04:26:42,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:26:42,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:42,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:26:42,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:26:42,011 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 10 states. [2020-10-13 04:26:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:42,174 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2020-10-13 04:26:42,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:26:42,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 04:26:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:42,176 INFO L225 Difference]: With dead ends: 93 [2020-10-13 04:26:42,176 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 04:26:42,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:26:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 04:26:42,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-13 04:26:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 04:26:42,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-10-13 04:26:42,197 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 39 [2020-10-13 04:26:42,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:42,197 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-10-13 04:26:42,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:26:42,197 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-10-13 04:26:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 04:26:42,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:42,198 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:42,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:26:42,199 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:42,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:42,199 INFO L82 PathProgramCache]: Analyzing trace with hash 992241060, now seen corresponding path program 6 times [2020-10-13 04:26:42,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:42,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227194413] [2020-10-13 04:26:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:42,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:42,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:42,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:42,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:42,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:42,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:42,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:43,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:43,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:43,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:43,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:44,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:44,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:26:44,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 04:26:44,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2081 [2020-10-13 04:26:44,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:44,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:26:44,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:44,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:26:44,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:44,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:44,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:44,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:44,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:44,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:44,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:44,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:44,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:44,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:44,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:44,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:44,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 04:26:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:44,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:44,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:44,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:44,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:44,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:26:44,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:44,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:44,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:44,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:26:44,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:44,800 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:44,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227194413] [2020-10-13 04:26:44,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:44,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:26:44,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597707729] [2020-10-13 04:26:44,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:26:44,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:44,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:26:44,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:26:44,802 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 22 states. [2020-10-13 04:26:45,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:45,834 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2020-10-13 04:26:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:26:45,835 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 40 [2020-10-13 04:26:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:45,837 INFO L225 Difference]: With dead ends: 89 [2020-10-13 04:26:45,837 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 04:26:45,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:26:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 04:26:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-13 04:26:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:26:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-10-13 04:26:45,854 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 40 [2020-10-13 04:26:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:45,855 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-10-13 04:26:45,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:26:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-10-13 04:26:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:26:45,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:45,856 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:45,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:26:45,856 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:45,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1660210427, now seen corresponding path program 7 times [2020-10-13 04:26:45,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:45,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135407651] [2020-10-13 04:26:45,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:45,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:45,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:46,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:46,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:46,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 04:26:46,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:26:46,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 898 [2020-10-13 04:26:46,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:46,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:26:46,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:46,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:26:46,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:47,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:47,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:47,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:47,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:47,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:47,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:26:47,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:47,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:47,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:47,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:47,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:47,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 04:26:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:47,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:47,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:47,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:47,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:47,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:26:47,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:47,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:47,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:47,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:26:47,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:47,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 04:26:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:47,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:47,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:47,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:47,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:47,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:47,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:47,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:47,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:47,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:47,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:26:47,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135407651] [2020-10-13 04:26:47,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:47,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:26:47,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272650666] [2020-10-13 04:26:47,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:26:47,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:47,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:26:47,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:26:47,111 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 20 states. [2020-10-13 04:26:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:47,905 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-10-13 04:26:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:26:47,906 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2020-10-13 04:26:47,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:47,907 INFO L225 Difference]: With dead ends: 91 [2020-10-13 04:26:47,907 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:26:47,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:26:47,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:26:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-10-13 04:26:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 04:26:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-10-13 04:26:47,928 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 42 [2020-10-13 04:26:47,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:47,928 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-10-13 04:26:47,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:26:47,928 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-10-13 04:26:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 04:26:47,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:47,929 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:47,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:26:47,929 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:47,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:47,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1850806188, now seen corresponding path program 8 times [2020-10-13 04:26:47,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:47,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420919749] [2020-10-13 04:26:47,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:47,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:47,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:48,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:48,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:48,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:48,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:48,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:48,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:49,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:51,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:51,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:26:51,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:26:51,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3126 [2020-10-13 04:26:51,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:51,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:26:51,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:51,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 04:26:51,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:51,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:51,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:51,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:51,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:51,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:51,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:51,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:51,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:51,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:51,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:51,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:51,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 04:26:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:51,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:51,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:51,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:51,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:51,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:51,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:51,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:51,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:51,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:51,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:51,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 04:26:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:51,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:51,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:51,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:51,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:51,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:26:51,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:51,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:51,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:51,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:26:51,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:26:51,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420919749] [2020-10-13 04:26:51,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:51,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:26:51,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184957853] [2020-10-13 04:26:51,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:26:51,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:51,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:26:51,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:26:51,664 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 21 states. [2020-10-13 04:26:53,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:53,012 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-10-13 04:26:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:26:53,014 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2020-10-13 04:26:53,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:53,015 INFO L225 Difference]: With dead ends: 105 [2020-10-13 04:26:53,015 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 04:26:53,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:26:53,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 04:26:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2020-10-13 04:26:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 04:26:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-10-13 04:26:53,044 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 45 [2020-10-13 04:26:53,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:53,044 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-10-13 04:26:53,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:26:53,045 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-10-13 04:26:53,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 04:26:53,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:53,045 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:53,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:26:53,046 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:53,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:53,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1086743131, now seen corresponding path program 9 times [2020-10-13 04:26:53,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:53,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526927542] [2020-10-13 04:26:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:53,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:53,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:53,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:53,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:53,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:53,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:53,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:53,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:53,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:53,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:54,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:54,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:54,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:55,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:56,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:56,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:26:56,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 04:26:56,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3294 [2020-10-13 04:26:56,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:56,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:26:56,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:56,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:26:56,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:56,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:56,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:56,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:56,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:56,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:56,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:56,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:56,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:56,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:56,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:56,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:56,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 04:26:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:56,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:56,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:56,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:56,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:56,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:56,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:56,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:56,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:56,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:56,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:56,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 04:26:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:56,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:56,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:56,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:56,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:56,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:26:56,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:56,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:56,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:56,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:26:56,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:26:56,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526927542] [2020-10-13 04:26:56,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:56,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:26:56,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516085893] [2020-10-13 04:26:56,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:26:56,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:56,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:26:56,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:26:56,939 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 22 states. [2020-10-13 04:26:59,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:59,167 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2020-10-13 04:26:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 04:26:59,167 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-13 04:26:59,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:59,169 INFO L225 Difference]: With dead ends: 117 [2020-10-13 04:26:59,169 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 04:26:59,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=321, Invalid=2435, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 04:26:59,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 04:26:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2020-10-13 04:26:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 04:26:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-10-13 04:26:59,195 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 48 [2020-10-13 04:26:59,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:59,195 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-10-13 04:26:59,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:26:59,195 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-10-13 04:26:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 04:26:59,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:59,196 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:59,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:26:59,196 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:59,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:59,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2071887182, now seen corresponding path program 10 times [2020-10-13 04:26:59,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:59,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233525702] [2020-10-13 04:26:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:59,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:59,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:59,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:26:59,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:59,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-13 04:26:59,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:59,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:26:59,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:59,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 04:26:59,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:59,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:59,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:59,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:59,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:59,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:59,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:59,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:59,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:59,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:59,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:59,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:59,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 04:26:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:59,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:59,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:59,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:59,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:59,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:59,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:59,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:59,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:59,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:59,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:59,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 04:26:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:59,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:59,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:59,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:59,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:59,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:59,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:59,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:59,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:59,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:59,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 04:26:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:59,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:59,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:59,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:26:59,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:59,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:59,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:59,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:26:59,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233525702] [2020-10-13 04:26:59,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:59,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:26:59,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586381128] [2020-10-13 04:26:59,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:26:59,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:59,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:26:59,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:26:59,426 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 12 states. [2020-10-13 04:26:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:59,691 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2020-10-13 04:26:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:26:59,692 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-13 04:26:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:59,693 INFO L225 Difference]: With dead ends: 104 [2020-10-13 04:26:59,693 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 04:26:59,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:26:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 04:26:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-13 04:26:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:26:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2020-10-13 04:26:59,722 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 50 [2020-10-13 04:26:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:59,723 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2020-10-13 04:26:59,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:26:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2020-10-13 04:26:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:26:59,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:59,724 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:59,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:26:59,727 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:59,728 INFO L82 PathProgramCache]: Analyzing trace with hash -635117836, now seen corresponding path program 11 times [2020-10-13 04:26:59,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:59,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883899929] [2020-10-13 04:26:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:59,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:59,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:59,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:01,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:01,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:01,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:01,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:01,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:01,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:02,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:02,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:02,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:03,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:03,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 04:27:03,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 04:27:03,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3767 [2020-10-13 04:27:03,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:03,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:27:03,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:03,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 04:27:03,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:04,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:04,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:04,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:04,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:04,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:04,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:04,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:04,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:04,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:04,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:04,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:04,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 04:27:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:04,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:04,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:04,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:04,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:04,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:27:04,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:04,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:04,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:04,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:04,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:04,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 04:27:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:04,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:04,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:04,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:04,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:04,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:04,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:04,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:04,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:04,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:04,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:27:04,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883899929] [2020-10-13 04:27:04,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:04,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:27:04,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800101485] [2020-10-13 04:27:04,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:27:04,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:04,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:27:04,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:27:04,317 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 24 states. [2020-10-13 04:27:05,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:05,509 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2020-10-13 04:27:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:27:05,509 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-10-13 04:27:05,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:05,511 INFO L225 Difference]: With dead ends: 96 [2020-10-13 04:27:05,511 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 04:27:05,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:27:05,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 04:27:05,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2020-10-13 04:27:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:27:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2020-10-13 04:27:05,534 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 51 [2020-10-13 04:27:05,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:05,534 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2020-10-13 04:27:05,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:27:05,535 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2020-10-13 04:27:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 04:27:05,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:05,535 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:05,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:27:05,536 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:05,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:05,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1077099787, now seen corresponding path program 12 times [2020-10-13 04:27:05,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:05,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631843057] [2020-10-13 04:27:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:05,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:05,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:05,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:05,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:10,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:27:10,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:27:10,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4664 [2020-10-13 04:27:10,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:10,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:27:10,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:10,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 04:27:10,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:10,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:10,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:10,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:10,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:10,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:10,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:10,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:10,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:10,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:10,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:10,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 04:27:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:10,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:10,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:10,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:10,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:10,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:10,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:10,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:10,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:10,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:10,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 04:27:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:10,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:10,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:10,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:10,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:27:10,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:10,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:10,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 04:27:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:10,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:10,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:10,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:10,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:10,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:10,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:10,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:10,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:10,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:10,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 04:27:10,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631843057] [2020-10-13 04:27:10,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:10,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:27:10,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135329258] [2020-10-13 04:27:10,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:27:10,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:10,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:27:10,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:27:10,672 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 21 states. [2020-10-13 04:27:11,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:11,668 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2020-10-13 04:27:11,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:27:11,669 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-13 04:27:11,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:11,670 INFO L225 Difference]: With dead ends: 94 [2020-10-13 04:27:11,670 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 04:27:11,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:27:11,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 04:27:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2020-10-13 04:27:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:27:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2020-10-13 04:27:11,691 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 53 [2020-10-13 04:27:11,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:11,691 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2020-10-13 04:27:11,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:27:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2020-10-13 04:27:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:27:11,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:11,692 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:11,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:27:11,692 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:11,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1872214034, now seen corresponding path program 13 times [2020-10-13 04:27:11,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:11,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198074497] [2020-10-13 04:27:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:11,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:11,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:11,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:11,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:11,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:12,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:12,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:12,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:12,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:13,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:13,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:15,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:16,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:16,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 04:27:16,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 04:27:16,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:27:16,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:16,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:27:16,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:16,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:27:16,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:17,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:17,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:17,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:17,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:17,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:17,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:17,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:17,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:17,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:17,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:17,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:17,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 04:27:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:17,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:17,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:17,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:17,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:17,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:17,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:17,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:17,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:17,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:17,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:17,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 04:27:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:17,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:17,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:17,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:17,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:17,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:17,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:17,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:17,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:17,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:17,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:17,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 04:27:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:17,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:17,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:17,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:17,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:17,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:27:17,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:17,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:17,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:17,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:17,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 11 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 04:27:17,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198074497] [2020-10-13 04:27:17,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:17,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:27:17,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128503876] [2020-10-13 04:27:17,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:27:17,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:17,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:27:17,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:27:17,184 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 22 states. [2020-10-13 04:27:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:18,609 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2020-10-13 04:27:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:27:18,612 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2020-10-13 04:27:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:18,614 INFO L225 Difference]: With dead ends: 114 [2020-10-13 04:27:18,614 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 04:27:18,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:27:18,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 04:27:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 84. [2020-10-13 04:27:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:27:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2020-10-13 04:27:18,634 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 56 [2020-10-13 04:27:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:18,634 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2020-10-13 04:27:18,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:27:18,634 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2020-10-13 04:27:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:27:18,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:18,635 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:18,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:27:18,635 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:18,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1918858325, now seen corresponding path program 14 times [2020-10-13 04:27:18,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:18,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779338789] [2020-10-13 04:27:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:18,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:18,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:18,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:18,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:19,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:19,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:19,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:19,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:20,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:20,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:20,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:20,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:20,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:20,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:21,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:21,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:21,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:23,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:23,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:23,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:23,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 04:27:23,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 04:27:23,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:27:23,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:23,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:27:23,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:23,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 04:27:23,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:24,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:24,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:24,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:24,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:24,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:24,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:24,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:24,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:24,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:24,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:24,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:24,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 04:27:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:24,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:24,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:24,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:24,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:24,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:24,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:24,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:24,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:24,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:24,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:24,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 04:27:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:24,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:24,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:24,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:24,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:24,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:24,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:24,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:24,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:24,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:24,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:24,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 04:27:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:24,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:24,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:24,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:24,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:24,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:24,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:24,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:24,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:24,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:24,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 6 proven. 95 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:27:24,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779338789] [2020-10-13 04:27:24,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:24,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:27:24,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414170883] [2020-10-13 04:27:24,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:27:24,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:24,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:27:24,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:27:24,160 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 24 states. [2020-10-13 04:27:25,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:25,340 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2020-10-13 04:27:25,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:27:25,341 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-13 04:27:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:25,342 INFO L225 Difference]: With dead ends: 116 [2020-10-13 04:27:25,343 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 04:27:25,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:27:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 04:27:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 100. [2020-10-13 04:27:25,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:27:25,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2020-10-13 04:27:25,370 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 59 [2020-10-13 04:27:25,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:25,370 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2020-10-13 04:27:25,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:27:25,370 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2020-10-13 04:27:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 04:27:25,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:25,371 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:25,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:27:25,371 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:25,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:25,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2023154370, now seen corresponding path program 15 times [2020-10-13 04:27:25,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:25,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638100098] [2020-10-13 04:27:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:25,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:25,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:25,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 04:27:25,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:25,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-13 04:27:25,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:25,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:27:25,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:25,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:27:25,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:25,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:25,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:25,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:25,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:25,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:25,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:25,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:25,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:25,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:25,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:25,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:25,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 04:27:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:25,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:25,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:25,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:25,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:25,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:25,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:25,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:25,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:25,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:25,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:25,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 04:27:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:25,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:25,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:25,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:25,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:25,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:25,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:25,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:25,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:25,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:25,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:25,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 04:27:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:25,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:25,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:25,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:25,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:25,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:25,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:25,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:25,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:25,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:25,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:25,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 04:27:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:25,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:25,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:25,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:25,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:25,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:25,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:25,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:25,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:25,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:25,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 27 proven. 53 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 04:27:25,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638100098] [2020-10-13 04:27:25,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:25,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:27:25,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863692223] [2020-10-13 04:27:25,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:27:25,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:25,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:27:25,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:27:25,667 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand 14 states. [2020-10-13 04:27:25,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:25,913 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2020-10-13 04:27:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:27:25,914 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-13 04:27:25,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:25,915 INFO L225 Difference]: With dead ends: 117 [2020-10-13 04:27:25,915 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 04:27:25,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:27:25,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 04:27:25,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-13 04:27:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 04:27:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2020-10-13 04:27:25,935 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 61 [2020-10-13 04:27:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:25,935 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2020-10-13 04:27:25,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:27:25,935 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2020-10-13 04:27:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 04:27:25,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:25,936 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:25,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:27:25,936 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash -214997303, now seen corresponding path program 16 times [2020-10-13 04:27:25,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:25,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978871292] [2020-10-13 04:27:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:25,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:26,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:26,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:26,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:29,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:30,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:30,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 04:27:30,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:27:30,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:27:30,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:30,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:27:30,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:30,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:27:30,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:31,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:31,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:31,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:31,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:31,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:31,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:31,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:31,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:31,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 04:27:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:31,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:31,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:31,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:31,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:31,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:27:31,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:31,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:31,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:31,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:31,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:31,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 04:27:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:31,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:31,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:31,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:31,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:31,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:31,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:31,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:31,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:31,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:31,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:31,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 04:27:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:31,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:31,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:31,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:31,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:31,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:31,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:31,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:31,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:31,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:31,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:31,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 04:27:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:31,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:31,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:31,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:31,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:31,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:31,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:31,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:31,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:31,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:31,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 7 proven. 99 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 04:27:31,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978871292] [2020-10-13 04:27:31,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:31,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:27:31,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184907818] [2020-10-13 04:27:31,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:27:31,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:31,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:27:31,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:27:31,590 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand 25 states. [2020-10-13 04:27:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:32,876 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2020-10-13 04:27:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:27:32,877 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-10-13 04:27:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:32,878 INFO L225 Difference]: With dead ends: 99 [2020-10-13 04:27:32,878 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 04:27:32,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=146, Invalid=1576, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:27:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 04:27:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2020-10-13 04:27:32,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 04:27:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2020-10-13 04:27:32,906 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 64 [2020-10-13 04:27:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:32,906 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2020-10-13 04:27:32,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:27:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2020-10-13 04:27:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 04:27:32,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:32,907 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:32,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:27:32,908 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:32,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1919184542, now seen corresponding path program 17 times [2020-10-13 04:27:32,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:32,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547191025] [2020-10-13 04:27:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:32,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:33,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:33,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:33,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:33,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:33,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:35,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:36,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:37,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:37,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:37,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:27:37,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:27:37,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:27:37,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:37,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:27:37,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:37,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 04:27:37,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:38,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:38,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:38,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:38,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:38,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:38,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:38,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:38,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:38,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:38,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:38,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:38,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 04:27:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:38,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:38,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:38,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:38,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:38,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:27:38,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:38,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:38,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:38,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:38,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:38,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 04:27:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:38,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:38,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:38,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:38,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:38,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:38,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:38,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:38,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:38,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:38,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:38,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 04:27:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:38,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:38,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:38,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:38,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:38,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:38,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:38,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:38,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:38,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:38,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:38,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 04:27:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:38,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:38,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:38,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:38,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:38,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:38,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:38,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:38,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:38,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:38,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 7 proven. 119 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 04:27:38,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547191025] [2020-10-13 04:27:38,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:38,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:27:38,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827257892] [2020-10-13 04:27:38,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:27:38,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:38,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:27:38,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:27:38,966 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 27 states. [2020-10-13 04:27:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:41,167 INFO L93 Difference]: Finished difference Result 127 states and 144 transitions. [2020-10-13 04:27:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 04:27:41,167 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 67 [2020-10-13 04:27:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:41,169 INFO L225 Difference]: With dead ends: 127 [2020-10-13 04:27:41,169 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 04:27:41,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=253, Invalid=2717, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 04:27:41,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 04:27:41,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 105. [2020-10-13 04:27:41,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 04:27:41,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2020-10-13 04:27:41,203 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 67 [2020-10-13 04:27:41,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:41,203 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2020-10-13 04:27:41,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:27:41,203 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2020-10-13 04:27:41,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 04:27:41,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:41,205 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:41,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:27:41,205 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:41,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:41,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1884863781, now seen corresponding path program 1 times [2020-10-13 04:27:41,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:41,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696926548] [2020-10-13 04:27:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:41,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:41,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:41,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:41,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:41,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:41,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:42,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:43,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:44,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:44,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:44,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:46,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:46,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 04:27:46,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 04:27:46,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:27:46,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:46,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:27:46,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:27:46,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:27:46,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:46,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:46,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:46,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:46,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:46,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:46,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:46,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:46,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:46,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:46,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:27:46,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:46,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 04:27:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:46,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:46,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:46,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:46,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:46,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:27:46,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:46,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:46,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:27:46,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:46,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:46,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 04:27:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:46,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:46,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:46,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:46,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:46,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:27:46,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:46,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:46,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:27:46,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:46,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:46,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 04:27:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:46,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:46,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:46,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:46,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:46,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:27:46,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:46,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:46,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:27:46,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:46,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:46,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-13 04:27:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:46,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:46,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:46,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:46,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:46,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:27:46,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:46,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:46,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:27:46,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:46,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 92 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 04:27:46,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696926548] [2020-10-13 04:27:46,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:46,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:27:46,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222245315] [2020-10-13 04:27:46,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:27:46,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:46,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:27:46,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:27:46,355 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand 13 states. [2020-10-13 04:27:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:46,732 INFO L93 Difference]: Finished difference Result 175 states and 201 transitions. [2020-10-13 04:27:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:27:46,733 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-10-13 04:27:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:46,734 INFO L225 Difference]: With dead ends: 175 [2020-10-13 04:27:46,734 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 04:27:46,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:27:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 04:27:46,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2020-10-13 04:27:46,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 04:27:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2020-10-13 04:27:46,772 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 69 [2020-10-13 04:27:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:46,772 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2020-10-13 04:27:46,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:27:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2020-10-13 04:27:46,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 04:27:46,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:46,774 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:46,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:27:46,774 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:46,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:46,775 INFO L82 PathProgramCache]: Analyzing trace with hash -552815575, now seen corresponding path program 18 times [2020-10-13 04:27:46,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:46,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643321882] [2020-10-13 04:27:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:46,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:47,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:47,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:47,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:47,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:47,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:48,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:48,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:48,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:48,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:48,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:49,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:49,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:49,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:50,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:50,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:51,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:51,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 04:27:51,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 04:27:51,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:27:51,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:27:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 04:27:51,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:52,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:52,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:52,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:52,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:52,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:52,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:52,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:52,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:52,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:52,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:52,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:52,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 04:27:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:52,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:52,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:52,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:52,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:52,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:27:52,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:52,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:27:52,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:52,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:27:52,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:52,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 04:27:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:52,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:52,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:52,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:52,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:52,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:52,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:52,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:52,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:52,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:52,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:52,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 04:27:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:53,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:53,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:53,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:53,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:53,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:53,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:53,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:53,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:53,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 04:27:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:53,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:53,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:53,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:53,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:53,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:53,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:53,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:53,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:53,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:53,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 7 proven. 142 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 04:27:53,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643321882] [2020-10-13 04:27:53,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:53,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:27:53,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696615071] [2020-10-13 04:27:53,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:27:53,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:53,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:27:53,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:27:53,025 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand 28 states. [2020-10-13 04:27:56,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:56,825 INFO L93 Difference]: Finished difference Result 155 states and 179 transitions. [2020-10-13 04:27:56,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 04:27:56,825 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-10-13 04:27:56,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:56,827 INFO L225 Difference]: With dead ends: 155 [2020-10-13 04:27:56,827 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 04:27:56,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=457, Invalid=4655, Unknown=0, NotChecked=0, Total=5112 [2020-10-13 04:27:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 04:27:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 108. [2020-10-13 04:27:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 04:27:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2020-10-13 04:27:56,864 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 70 [2020-10-13 04:27:56,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:56,864 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2020-10-13 04:27:56,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:27:56,864 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2020-10-13 04:27:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 04:27:56,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:56,865 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:56,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:27:56,866 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:56,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:56,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1881435776, now seen corresponding path program 19 times [2020-10-13 04:27:56,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:56,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847375984] [2020-10-13 04:27:56,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:56,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:57,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:57,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:27:57,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:57,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-13 04:27:57,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:57,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:27:57,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:57,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 04:27:57,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:57,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:57,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:57,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:57,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:57,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:57,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:57,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:57,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:57,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:57,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:57,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:57,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 04:27:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:57,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:57,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:57,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:57,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:57,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:57,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:57,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:57,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:57,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:57,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:57,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 04:27:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:57,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:57,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:57,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:57,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:57,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:57,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:57,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:57,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:57,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:57,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:57,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 04:27:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:57,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:57,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:57,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:57,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:57,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:57,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:57,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:57,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:57,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:57,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:57,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 04:27:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:57,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:57,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:57,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:57,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:57,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:57,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:57,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:57,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:57,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:57,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:57,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-13 04:27:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:57,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:57,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:57,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:27:57,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:57,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:57,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:57,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:27:57,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:57,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:27:57,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 60 proven. 57 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 04:27:57,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847375984] [2020-10-13 04:27:57,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:57,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:27:57,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383938757] [2020-10-13 04:27:57,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:27:57,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:57,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:27:57,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:27:57,246 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand 16 states. [2020-10-13 04:27:57,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:57,553 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2020-10-13 04:27:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:27:57,554 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-13 04:27:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:57,556 INFO L225 Difference]: With dead ends: 125 [2020-10-13 04:27:57,556 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:27:57,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:27:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:27:57,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-13 04:27:57,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 04:27:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2020-10-13 04:27:57,582 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 72 [2020-10-13 04:27:57,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:57,582 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2020-10-13 04:27:57,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:27:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2020-10-13 04:27:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 04:27:57,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:57,584 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:57,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:27:57,584 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:57,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1230688226, now seen corresponding path program 2 times [2020-10-13 04:27:57,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:57,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115314748] [2020-10-13 04:27:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:57,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:57,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:57,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:57,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:58,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:58,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:59,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:59,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:00,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:00,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:00,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:02,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:02,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:28:02,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 04:28:02,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:28:02,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:02,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:28:02,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:28:02,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:28:02,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:02,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:02,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:02,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:02,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:02,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:02,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:02,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:02,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:02,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:02,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:28:02,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:02,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 04:28:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:02,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:02,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:02,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:02,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:02,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:02,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:02,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:02,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:02,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:02,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:02,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 04:28:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:02,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:02,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:02,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:02,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:02,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:02,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:02,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:02,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:02,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:02,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:02,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 04:28:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:02,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:02,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:02,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:02,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:02,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:02,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:02,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:02,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-13 04:28:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:02,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:02,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:02,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:02,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:02,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:02,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:02,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:02,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:02,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:02,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 8 proven. 117 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 04:28:02,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115314748] [2020-10-13 04:28:02,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:02,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:28:02,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625775713] [2020-10-13 04:28:02,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:28:02,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:02,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:28:02,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:28:02,761 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand 14 states. [2020-10-13 04:28:03,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:03,205 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2020-10-13 04:28:03,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:28:03,208 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 72 [2020-10-13 04:28:03,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:03,209 INFO L225 Difference]: With dead ends: 174 [2020-10-13 04:28:03,209 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 04:28:03,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:28:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 04:28:03,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 91. [2020-10-13 04:28:03,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 04:28:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2020-10-13 04:28:03,231 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 72 [2020-10-13 04:28:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:03,231 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2020-10-13 04:28:03,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:28:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2020-10-13 04:28:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 04:28:03,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:03,233 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:03,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:28:03,233 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:03,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:03,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1540016130, now seen corresponding path program 20 times [2020-10-13 04:28:03,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:03,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484270045] [2020-10-13 04:28:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:03,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:03,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:03,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:03,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:04,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:04,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:05,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:05,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:05,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:05,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:05,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:06,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:06,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:07,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:07,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:08,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:08,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 04:28:08,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 04:28:08,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:28:08,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:08,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:28:08,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:08,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 04:28:08,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:09,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:09,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:09,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:09,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:09,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:09,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:09,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:09,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:09,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:09,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:09,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:09,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 04:28:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:09,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:09,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:09,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:09,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:09,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:09,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:09,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:09,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:09,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:09,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:09,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 04:28:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:09,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:09,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:09,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:09,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:09,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:09,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:09,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:09,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:09,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:09,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:09,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 04:28:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:09,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:09,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:09,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:09,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:09,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:28:09,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:28:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:09,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:28:09,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:09,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 04:28:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:09,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:09,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:09,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:09,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:09,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:09,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:09,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:09,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:09,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:09,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 13 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 04:28:09,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484270045] [2020-10-13 04:28:09,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:09,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:28:09,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436699393] [2020-10-13 04:28:09,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:28:09,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:09,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:28:09,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:28:09,688 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand 29 states. [2020-10-13 04:28:13,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:13,634 INFO L93 Difference]: Finished difference Result 155 states and 180 transitions. [2020-10-13 04:28:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 04:28:13,634 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 73 [2020-10-13 04:28:13,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:13,635 INFO L225 Difference]: With dead ends: 155 [2020-10-13 04:28:13,635 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 04:28:13,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=534, Invalid=4722, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 04:28:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 04:28:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2020-10-13 04:28:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:28:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2020-10-13 04:28:13,675 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 73 [2020-10-13 04:28:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:13,676 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2020-10-13 04:28:13,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:28:13,676 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2020-10-13 04:28:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:28:13,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:13,677 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:13,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:28:13,677 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:13,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1246957543, now seen corresponding path program 21 times [2020-10-13 04:28:13,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:13,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317848366] [2020-10-13 04:28:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:13,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:13,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:14,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:14,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:16,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:18,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:18,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 04:28:18,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:28:18,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:28:18,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:18,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:28:18,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:18,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-13 04:28:18,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:19,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:19,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:19,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:19,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:19,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:19,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:19,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 04:28:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:19,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:19,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:19,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:19,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:19,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:19,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:19,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:19,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:19,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:19,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 04:28:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:19,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:19,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:19,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:19,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:19,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:28:19,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:19,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:28:19,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:19,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:28:19,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 04:28:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:19,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:19,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:19,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:19,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:19,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 04:28:19,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:19,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:19,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:19,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:19,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 04:28:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:19,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:19,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:19,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:19,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:19,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:19,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:19,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:19,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 04:28:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:19,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:19,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:19,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:19,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:19,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:19,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:19,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:19,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:19,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:19,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 12 proven. 137 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 04:28:19,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317848366] [2020-10-13 04:28:19,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:19,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:28:19,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983119593] [2020-10-13 04:28:19,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:28:19,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:19,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:28:19,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:28:19,728 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand 28 states. [2020-10-13 04:28:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:21,505 INFO L93 Difference]: Finished difference Result 127 states and 145 transitions. [2020-10-13 04:28:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:28:21,505 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 75 [2020-10-13 04:28:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:21,508 INFO L225 Difference]: With dead ends: 127 [2020-10-13 04:28:21,508 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 04:28:21,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=173, Invalid=2083, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:28:21,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 04:28:21,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 119. [2020-10-13 04:28:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 04:28:21,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2020-10-13 04:28:21,551 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 75 [2020-10-13 04:28:21,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:21,552 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2020-10-13 04:28:21,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:28:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2020-10-13 04:28:21,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:28:21,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:21,553 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:21,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:28:21,554 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:21,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1897705093, now seen corresponding path program 3 times [2020-10-13 04:28:21,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:21,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539726374] [2020-10-13 04:28:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:21,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:21,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:21,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:22,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:23,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:23,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:25,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:26,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:26,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:26,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:28:26,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:28:26,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:28:26,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:28:26,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:28:26,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:28:26,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:26,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:26,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:26,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:26,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:26,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:26,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:26,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:26,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:26,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:26,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:28:26,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:26,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 04:28:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:26,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:26,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:26,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:26,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:26,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:26,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:26,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:26,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:26,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:26,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:26,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 04:28:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:26,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:26,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:26,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:26,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:26,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:26,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:26,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:26,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:26,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:26,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:26,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 04:28:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:26,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:26,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:26,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:26,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:26,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:26,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:26,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:26,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:26,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:26,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:26,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 04:28:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:26,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:26,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:26,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:26,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:26,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:26,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:26,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:26,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:26,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:26,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 8 proven. 145 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 04:28:26,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539726374] [2020-10-13 04:28:26,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:26,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:28:26,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902366117] [2020-10-13 04:28:26,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:28:26,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:26,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:28:26,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:28:26,765 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand 15 states. [2020-10-13 04:28:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:27,273 INFO L93 Difference]: Finished difference Result 208 states and 242 transitions. [2020-10-13 04:28:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:28:27,274 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2020-10-13 04:28:27,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:27,276 INFO L225 Difference]: With dead ends: 208 [2020-10-13 04:28:27,276 INFO L226 Difference]: Without dead ends: 173 [2020-10-13 04:28:27,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:28:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-13 04:28:27,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 121. [2020-10-13 04:28:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 04:28:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2020-10-13 04:28:27,310 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 75 [2020-10-13 04:28:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:27,310 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2020-10-13 04:28:27,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:28:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2020-10-13 04:28:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 04:28:27,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:27,311 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:27,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:28:27,311 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:27,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:27,312 INFO L82 PathProgramCache]: Analyzing trace with hash -950896247, now seen corresponding path program 22 times [2020-10-13 04:28:27,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:27,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015409834] [2020-10-13 04:28:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:27,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:27,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:27,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:27,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:27,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:28,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:28,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:28,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:28,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:29,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:30,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:30,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:32,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:32,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:32,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:32,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:28:32,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 04:28:32,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:28:32,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:32,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:28:32,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:32,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 04:28:32,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:33,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:33,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:33,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:33,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:33,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:33,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:33,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:33,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:33,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:33,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:33,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:33,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 04:28:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:33,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:33,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:33,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:33,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:33,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:33,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:33,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:33,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:33,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:33,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:33,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 04:28:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:33,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:33,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:33,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:33,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:33,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:33,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:33,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:33,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:33,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:33,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:33,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 04:28:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:33,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:33,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:33,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:33,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:33,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:33,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:33,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:33,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:33,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:33,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:33,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 04:28:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:33,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:33,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:33,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:33,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:33,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:33,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:33,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:33,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:33,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:33,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 17 proven. 178 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 04:28:33,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015409834] [2020-10-13 04:28:33,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:33,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:28:33,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279885285] [2020-10-13 04:28:33,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:28:33,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:33,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:28:33,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:28:33,283 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand 30 states. [2020-10-13 04:28:35,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:35,154 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2020-10-13 04:28:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:28:35,155 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 76 [2020-10-13 04:28:35,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:35,156 INFO L225 Difference]: With dead ends: 164 [2020-10-13 04:28:35,156 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 04:28:35,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:28:35,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 04:28:35,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-13 04:28:35,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 04:28:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2020-10-13 04:28:35,201 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 76 [2020-10-13 04:28:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:35,201 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2020-10-13 04:28:35,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:28:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2020-10-13 04:28:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:28:35,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:35,203 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:35,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:28:35,203 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:35,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:35,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1577999328, now seen corresponding path program 23 times [2020-10-13 04:28:35,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:35,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795247670] [2020-10-13 04:28:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:35,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:35,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:35,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:35,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:35,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:35,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:35,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:36,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:36,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:38,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:39,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:40,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:40,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 04:28:40,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 04:28:40,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:28:40,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:40,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:28:40,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:40,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 04:28:40,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:41,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:41,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:41,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:41,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:41,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:41,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:41,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:41,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:41,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:41,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:41,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:41,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 04:28:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:41,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:41,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:41,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:41,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:41,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:41,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:41,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:41,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:41,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:41,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:41,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 04:28:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:41,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:41,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:41,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:41,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:41,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:28:41,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:41,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:28:41,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:41,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:28:41,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:41,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 04:28:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:41,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:41,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:41,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:41,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:41,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:28:41,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:41,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:28:41,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:41,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:28:41,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:41,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 04:28:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:41,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:41,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:41,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:41,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:41,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:41,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:41,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:41,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:41,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:41,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:41,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 04:28:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:41,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:41,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:41,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:41,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:41,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:41,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:41,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:41,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:41,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:41,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 164 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 04:28:41,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795247670] [2020-10-13 04:28:41,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:41,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:28:41,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444670285] [2020-10-13 04:28:41,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:28:41,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:28:41,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:28:41,603 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand 30 states. [2020-10-13 04:28:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:44,885 INFO L93 Difference]: Finished difference Result 166 states and 192 transitions. [2020-10-13 04:28:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 04:28:44,887 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 78 [2020-10-13 04:28:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:44,888 INFO L225 Difference]: With dead ends: 166 [2020-10-13 04:28:44,888 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 04:28:44,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=264, Invalid=3276, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 04:28:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 04:28:44,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 140. [2020-10-13 04:28:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 04:28:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2020-10-13 04:28:44,955 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 78 [2020-10-13 04:28:44,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:44,955 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2020-10-13 04:28:44,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:28:44,956 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2020-10-13 04:28:44,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 04:28:44,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:44,957 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:44,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:28:44,957 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:44,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:44,958 INFO L82 PathProgramCache]: Analyzing trace with hash -16021831, now seen corresponding path program 24 times [2020-10-13 04:28:44,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:44,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66790748] [2020-10-13 04:28:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:44,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:45,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:45,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:45,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:45,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:45,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:45,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:47,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:47,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:48,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:48,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:48,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:48,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:49,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:49,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:49,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:49,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:49,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 04:28:49,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 04:28:49,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:28:49,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:49,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:28:49,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:49,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 04:28:49,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:51,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:51,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:51,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:51,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:51,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:51,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:51,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:51,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:51,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:51,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:51,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 04:28:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:51,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:51,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:51,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:51,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:51,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:51,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:51,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:51,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:51,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:51,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:51,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 04:28:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:51,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:51,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:51,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:51,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:51,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:28:51,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:51,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:28:51,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:51,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:28:51,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:51,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 04:28:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:51,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:51,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:51,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:51,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:51,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:28:51,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:51,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:51,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:51,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:51,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:51,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 04:28:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:51,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:51,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:51,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:51,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:51,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:51,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:51,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:51,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:51,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:51,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:51,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-13 04:28:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:51,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:51,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:51,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:51,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:51,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:51,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:51,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:51,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:51,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:51,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 12 proven. 186 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 04:28:51,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66790748] [2020-10-13 04:28:51,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:51,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:28:51,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310046037] [2020-10-13 04:28:51,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:28:51,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:51,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:28:51,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:28:51,624 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand 32 states. [2020-10-13 04:28:53,379 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-13 04:28:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:56,886 INFO L93 Difference]: Finished difference Result 182 states and 208 transitions. [2020-10-13 04:28:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 04:28:56,888 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 81 [2020-10-13 04:28:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:56,889 INFO L225 Difference]: With dead ends: 182 [2020-10-13 04:28:56,890 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 04:28:56,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=347, Invalid=4075, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 04:28:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 04:28:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 102. [2020-10-13 04:28:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:28:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2020-10-13 04:28:56,939 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 81 [2020-10-13 04:28:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:56,939 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2020-10-13 04:28:56,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:28:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2020-10-13 04:28:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:28:56,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:56,941 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:56,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:28:56,942 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:56,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:56,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1517004752, now seen corresponding path program 25 times [2020-10-13 04:28:56,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:56,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173940180] [2020-10-13 04:28:56,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:56,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:57,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:57,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 04:28:57,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:57,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-13 04:28:57,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:57,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:28:57,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:57,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 04:28:57,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:57,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:57,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:57,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:57,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:57,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:57,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:57,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:57,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:57,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:57,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:57,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:57,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 04:28:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:57,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:57,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:57,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:57,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:57,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:57,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:57,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:57,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:57,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:57,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:57,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 04:28:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:57,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:57,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:57,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:57,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:57,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:57,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:57,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:57,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:57,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:57,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:57,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 04:28:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:57,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:57,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:57,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:57,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:57,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:57,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:57,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:57,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:57,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:57,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:57,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 04:28:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:57,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:57,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:57,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:57,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:57,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:57,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:57,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:57,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:57,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:57,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:57,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 04:28:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:57,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:57,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:57,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:57,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:57,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:57,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:57,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:57,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:57,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:57,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:57,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-13 04:28:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:57,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:57,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:57,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:57,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:57,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:57,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:57,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:57,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:57,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:57,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 84 proven. 77 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-13 04:28:57,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173940180] [2020-10-13 04:28:57,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:57,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:28:57,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22337322] [2020-10-13 04:28:57,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:28:57,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:57,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:28:57,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:28:57,492 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand 18 states. [2020-10-13 04:28:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:57,978 INFO L93 Difference]: Finished difference Result 138 states and 156 transitions. [2020-10-13 04:28:57,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:28:57,980 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-13 04:28:57,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:57,981 INFO L225 Difference]: With dead ends: 138 [2020-10-13 04:28:57,981 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 04:28:57,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:28:57,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 04:28:58,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-13 04:28:58,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:28:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2020-10-13 04:28:58,011 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 83 [2020-10-13 04:28:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:58,011 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2020-10-13 04:28:58,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:28:58,011 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2020-10-13 04:28:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 04:28:58,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:58,013 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:58,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:28:58,013 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:58,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:58,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1953022272, now seen corresponding path program 26 times [2020-10-13 04:28:58,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:58,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628502746] [2020-10-13 04:28:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:58,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:58,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:58,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:58,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:59,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:59,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:59,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:59,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:59,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:59,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:00,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:00,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:01,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:01,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:03,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:03,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 04:29:03,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 04:29:03,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:29:03,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:03,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:29:03,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:03,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 04:29:03,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:04,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:04,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:04,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:04,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:04,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:04,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:04,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:04,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:04,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:04,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:04,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:04,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 04:29:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:04,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:04,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:04,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:04,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:04,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:29:04,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:04,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:29:04,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:04,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:29:04,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:04,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 04:29:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:04,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:04,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:04,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:04,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:04,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:04,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:04,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:04,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:04,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:04,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:04,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 04:29:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:04,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:04,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:04,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:04,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:04,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:04,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:04,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:04,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:04,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:04,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 04:29:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:04,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:04,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:04,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:04,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:04,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:04,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:04,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:04,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:04,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:04,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:04,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-13 04:29:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:04,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:04,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:04,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:04,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:04,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:04,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:04,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:04,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:04,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:04,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 9 proven. 218 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 04:29:04,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628502746] [2020-10-13 04:29:04,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:04,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:29:04,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560310489] [2020-10-13 04:29:04,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:29:04,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:04,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:29:04,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:29:04,886 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand 35 states. [2020-10-13 04:29:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:09,857 INFO L93 Difference]: Finished difference Result 151 states and 169 transitions. [2020-10-13 04:29:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 04:29:09,860 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2020-10-13 04:29:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:09,861 INFO L225 Difference]: With dead ends: 151 [2020-10-13 04:29:09,861 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 04:29:09,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=371, Invalid=3289, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 04:29:09,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 04:29:09,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 110. [2020-10-13 04:29:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 04:29:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2020-10-13 04:29:09,897 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 84 [2020-10-13 04:29:09,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:09,898 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2020-10-13 04:29:09,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:29:09,898 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2020-10-13 04:29:09,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 04:29:09,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:09,899 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:09,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:29:09,900 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:09,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:09,900 INFO L82 PathProgramCache]: Analyzing trace with hash -312189801, now seen corresponding path program 27 times [2020-10-13 04:29:09,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:09,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502893775] [2020-10-13 04:29:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:09,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:09,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:10,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:10,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:14,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:14,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 04:29:14,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:29:14,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:29:14,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:14,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:29:14,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:14,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-13 04:29:14,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:15,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:15,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:15,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:15,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:15,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:15,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:15,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:15,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:15,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:15,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:15,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:15,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 04:29:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:15,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:15,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:15,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:15,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:15,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:15,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:15,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:15,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:15,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:15,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:15,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 04:29:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:15,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:15,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:15,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:15,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:15,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:15,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:15,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:15,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:15,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:15,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:15,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 04:29:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:15,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:15,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:15,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:15,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:15,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:29:15,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:15,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:29:15,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:15,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:29:15,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:16,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 04:29:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:16,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:16,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:16,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:16,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:16,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:16,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:16,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:16,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:16,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 04:29:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:16,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:16,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:16,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:16,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:16,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:16,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:16,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:16,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:16,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:16,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:16,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 04:29:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:16,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:16,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:16,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:16,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:16,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:16,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:16,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:16,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:16,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:16,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 17 proven. 182 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 04:29:16,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502893775] [2020-10-13 04:29:16,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:16,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:29:16,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561307967] [2020-10-13 04:29:16,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:29:16,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:16,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:29:16,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=752, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:29:16,134 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand 29 states. [2020-10-13 04:29:18,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:18,675 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2020-10-13 04:29:18,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:29:18,676 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 86 [2020-10-13 04:29:18,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:18,678 INFO L225 Difference]: With dead ends: 147 [2020-10-13 04:29:18,678 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 04:29:18,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=131, Invalid=1675, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:29:18,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 04:29:18,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 137. [2020-10-13 04:29:18,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 04:29:18,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2020-10-13 04:29:18,724 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 86 [2020-10-13 04:29:18,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:18,724 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2020-10-13 04:29:18,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:29:18,724 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2020-10-13 04:29:18,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 04:29:18,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:18,726 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:18,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:29:18,726 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:18,727 INFO L82 PathProgramCache]: Analyzing trace with hash 697933424, now seen corresponding path program 28 times [2020-10-13 04:29:18,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:18,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552789205] [2020-10-13 04:29:18,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:18,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:18,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:19,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:19,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:19,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:19,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:19,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:20,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:23,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:23,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:23,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 04:29:23,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:29:23,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:29:23,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:23,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:29:23,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:23,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-13 04:29:23,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:25,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:25,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:25,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:25,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:25,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:25,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:25,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:25,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:25,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:25,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:25,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:25,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 04:29:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:25,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:25,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:25,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:25,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:25,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:29:25,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:25,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:25,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:25,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:25,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:25,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 04:29:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:25,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:25,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:25,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:25,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:25,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:29:25,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:25,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:25,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:25,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:25,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:25,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-13 04:29:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:25,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:25,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:25,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:25,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:29:25,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:25,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:29:25,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:25,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:29:25,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:25,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-13 04:29:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:25,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:25,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:25,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:25,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:25,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:29:25,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:25,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:29:25,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:25,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:29:25,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:25,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-13 04:29:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:25,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:25,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:25,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:25,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:25,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:25,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:25,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:25,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:25,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:25,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:25,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-13 04:29:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:25,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:25,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:25,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:25,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:25,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:25,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:25,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:25,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:25,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:25,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 22 proven. 213 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 04:29:25,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552789205] [2020-10-13 04:29:25,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:25,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:29:25,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303643167] [2020-10-13 04:29:25,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:29:25,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:25,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:29:25,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=987, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:29:25,831 INFO L87 Difference]: Start difference. First operand 137 states and 155 transitions. Second operand 33 states. [2020-10-13 04:29:31,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:31,043 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2020-10-13 04:29:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 04:29:31,046 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 89 [2020-10-13 04:29:31,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:31,048 INFO L225 Difference]: With dead ends: 163 [2020-10-13 04:29:31,048 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 04:29:31,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=283, Invalid=3877, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 04:29:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 04:29:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 118. [2020-10-13 04:29:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 04:29:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2020-10-13 04:29:31,087 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 89 [2020-10-13 04:29:31,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:31,088 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2020-10-13 04:29:31,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:29:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2020-10-13 04:29:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:29:31,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:31,089 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:31,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:29:31,090 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:31,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:31,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1556913673, now seen corresponding path program 29 times [2020-10-13 04:29:31,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:31,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901359522] [2020-10-13 04:29:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:31,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:31,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:31,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:32,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:32,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:32,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:32,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:35,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:36,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:36,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 04:29:36,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 04:29:36,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:29:36,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:36,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:29:36,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:36,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-13 04:29:36,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:37,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:37,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:37,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:37,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:37,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:37,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:37,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:37,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:37,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:37,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:37,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:37,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 04:29:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:37,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:37,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:37,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:37,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:37,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:37,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:37,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:37,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:37,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:37,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:37,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 04:29:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:37,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:37,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:37,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:37,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:37,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:37,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:37,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:37,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:37,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:37,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:37,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 04:29:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:37,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:37,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:37,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:37,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:37,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:37,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:37,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:37,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:37,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:37,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:37,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 04:29:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:37,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:37,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:37,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:37,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:37,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:29:37,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:37,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:29:37,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:37,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:29:37,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:38,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-13 04:29:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:38,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:38,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:38,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:38,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:38,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:38,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:38,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:38,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:38,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:38,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:38,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-13 04:29:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:38,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:38,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:38,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:38,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:38,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:38,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:38,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:38,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:38,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:38,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 20 proven. 234 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 04:29:38,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901359522] [2020-10-13 04:29:38,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:38,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:29:38,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874553917] [2020-10-13 04:29:38,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:29:38,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:38,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:29:38,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:29:38,110 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand 32 states. [2020-10-13 04:29:43,414 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-13 04:29:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:45,294 INFO L93 Difference]: Finished difference Result 198 states and 229 transitions. [2020-10-13 04:29:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-13 04:29:45,295 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2020-10-13 04:29:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:45,297 INFO L225 Difference]: With dead ends: 198 [2020-10-13 04:29:45,297 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 04:29:45,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=681, Invalid=7151, Unknown=0, NotChecked=0, Total=7832 [2020-10-13 04:29:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 04:29:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 138. [2020-10-13 04:29:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 04:29:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 157 transitions. [2020-10-13 04:29:45,377 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 157 transitions. Word has length 92 [2020-10-13 04:29:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:45,377 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 157 transitions. [2020-10-13 04:29:45,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:29:45,377 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 157 transitions. [2020-10-13 04:29:45,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 04:29:45,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:45,378 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:45,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:29:45,379 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:45,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:45,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1012550066, now seen corresponding path program 30 times [2020-10-13 04:29:45,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:45,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134570910] [2020-10-13 04:29:45,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:45,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:46,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:46,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 04:29:46,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:46,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 625 [2020-10-13 04:29:46,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:46,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:29:46,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:46,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-13 04:29:46,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:46,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:46,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:46,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:46,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:46,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:46,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:46,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:46,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:46,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:46,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:46,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:46,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 04:29:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:46,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:46,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:46,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:46,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:46,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:46,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:46,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:46,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 04:29:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:46,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:46,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:46,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:46,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:46,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:46,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:46,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:46,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:46,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:46,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:46,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 04:29:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:46,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:46,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:46,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:46,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:46,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:46,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:46,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:46,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:46,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:46,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:46,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 04:29:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:46,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:46,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:46,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:46,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:46,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:46,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:46,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:46,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:46,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:46,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:46,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 04:29:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:46,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:46,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:46,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:46,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:46,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:46,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:46,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:46,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:46,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:46,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:46,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 04:29:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:46,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:46,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:46,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:46,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:46,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:46,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:46,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:46,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:46,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:46,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:46,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-13 04:29:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:46,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:46,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:46,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:46,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:46,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:46,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:46,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:46,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:46,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:46,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-13 04:29:46,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134570910] [2020-10-13 04:29:46,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:46,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:29:46,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240583468] [2020-10-13 04:29:46,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:29:46,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:46,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:29:46,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:29:46,432 INFO L87 Difference]: Start difference. First operand 138 states and 157 transitions. Second operand 20 states. [2020-10-13 04:29:47,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:47,269 INFO L93 Difference]: Finished difference Result 178 states and 204 transitions. [2020-10-13 04:29:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:29:47,271 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-10-13 04:29:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:47,273 INFO L225 Difference]: With dead ends: 178 [2020-10-13 04:29:47,273 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 04:29:47,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:29:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 04:29:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-13 04:29:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 04:29:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 156 transitions. [2020-10-13 04:29:47,321 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 156 transitions. Word has length 94 [2020-10-13 04:29:47,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:47,322 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 156 transitions. [2020-10-13 04:29:47,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:29:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 156 transitions. [2020-10-13 04:29:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 04:29:47,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:47,323 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:47,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:29:47,323 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1358883920, now seen corresponding path program 4 times [2020-10-13 04:29:47,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:47,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361631310] [2020-10-13 04:29:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:47,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:47,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:47,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:47,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:48,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:48,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:49,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:52,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:52,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 04:29:52,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:29:52,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:29:52,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:52,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:29:52,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 04:29:52,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 04:29:52,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:52,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:52,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:52,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:52,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:52,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:52,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:52,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:52,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:52,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:52,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:29:52,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:52,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 04:29:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:52,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:52,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:52,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:52,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:52,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:52,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:52,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:52,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:52,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:52,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:52,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 04:29:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:52,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:52,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:52,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:52,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:52,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:52,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:52,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:52,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:52,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:52,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:52,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 04:29:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:52,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:52,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:52,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:52,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:52,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:52,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:52,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:52,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:52,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:52,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:52,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-13 04:29:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:52,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:52,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:52,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:52,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:52,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:52,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:52,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:52,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-13 04:29:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:52,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:52,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:52,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:52,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:52,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:52,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:52,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:52,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:52,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:52,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:52,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-13 04:29:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:52,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:52,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:52,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:52,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:52,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:52,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:52,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:52,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:52,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:52,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 12 proven. 176 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-13 04:29:52,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361631310] [2020-10-13 04:29:52,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:52,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:29:52,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091639495] [2020-10-13 04:29:52,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:29:52,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:52,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:29:52,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:29:52,602 INFO L87 Difference]: Start difference. First operand 138 states and 156 transitions. Second operand 16 states. [2020-10-13 04:29:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:53,215 INFO L93 Difference]: Finished difference Result 236 states and 269 transitions. [2020-10-13 04:29:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:29:53,217 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 94 [2020-10-13 04:29:53,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:53,218 INFO L225 Difference]: With dead ends: 236 [2020-10-13 04:29:53,218 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 04:29:53,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:29:53,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 04:29:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-10-13 04:29:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 04:29:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2020-10-13 04:29:53,268 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 94 [2020-10-13 04:29:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:53,269 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2020-10-13 04:29:53,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:29:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2020-10-13 04:29:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 04:29:53,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:53,270 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:53,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:29:53,270 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:53,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1876696336, now seen corresponding path program 31 times [2020-10-13 04:29:53,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:53,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391229747] [2020-10-13 04:29:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:53,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:53,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:53,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:53,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:54,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:54,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:55,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:58,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:58,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:29:58,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:29:58,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:29:58,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:58,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:29:58,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:58,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-13 04:29:58,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:59,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:59,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:59,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:59,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:59,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:59,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:59,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:59,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:59,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:59,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:59,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:59,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-13 04:29:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:59,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:59,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:59,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:59,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:59,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:59,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:59,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:59,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:59,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:59,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:59,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 04:29:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:59,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:59,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:59,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:59,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:59,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:59,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:59,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:59,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:59,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:59,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:59,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 04:29:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:59,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:59,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:59,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:59,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:59,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:59,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:59,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:59,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:59,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:59,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:59,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-13 04:29:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:59,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:59,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:59,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:59,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:59,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:59,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:59,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:59,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:59,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:59,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:59,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-13 04:29:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:59,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:59,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:59,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:59,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:59,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:59,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:59,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:59,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:59,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:59,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:59,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-13 04:29:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:59,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:59,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:59,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:59,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:59,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:59,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:59,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:59,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:59,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:59,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 15 proven. 256 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-13 04:29:59,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391229747] [2020-10-13 04:29:59,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:59,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:29:59,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420267575] [2020-10-13 04:29:59,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:29:59,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:59,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:29:59,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:29:59,938 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand 35 states.