/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-industry-pattern/array_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:15:22,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:15:22,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:15:22,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:15:22,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:15:22,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:15:22,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:15:22,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:15:22,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:15:22,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:15:22,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:15:22,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:15:22,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:15:22,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:15:22,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:15:22,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:15:22,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:15:22,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:15:22,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:15:22,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:15:22,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:15:22,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:15:22,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:15:22,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:15:22,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:15:22,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:15:22,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:15:22,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:15:22,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:15:22,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:15:22,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:15:22,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:15:22,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:15:22,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:15:22,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:15:22,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:15:22,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:15:22,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:15:22,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:15:22,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:15:22,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:15:22,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 05:15:22,930 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:15:22,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:15:22,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:15:22,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:15:22,932 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:15:22,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:15:22,933 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:15:22,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:15:22,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:15:22,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:15:22,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:15:22,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:15:22,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:15:22,937 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:15:22,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:15:22,938 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:15:22,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:15:22,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:15:22,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:15:22,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:15:22,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:15:22,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:15:22,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:15:22,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:15:22,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:15:22,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:15:22,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:15:22,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:15:22,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:15:22,944 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:15:23,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:15:23,272 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:15:23,276 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:15:23,278 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:15:23,278 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:15:23,279 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2020-10-13 05:15:23,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93523c893/30eca0f3cefa4e17a3b1a419da7d70b2/FLAG3b5b5d1e8 [2020-10-13 05:15:23,802 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:15:23,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2020-10-13 05:15:23,809 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93523c893/30eca0f3cefa4e17a3b1a419da7d70b2/FLAG3b5b5d1e8 [2020-10-13 05:15:24,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93523c893/30eca0f3cefa4e17a3b1a419da7d70b2 [2020-10-13 05:15:24,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:15:24,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:15:24,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:15:24,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:15:24,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:15:24,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:15:24" (1/1) ... [2020-10-13 05:15:24,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56344ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:24, skipping insertion in model container [2020-10-13 05:15:24,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:15:24" (1/1) ... [2020-10-13 05:15:24,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:15:24,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:15:24,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:15:24,444 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:15:24,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:15:24,486 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:15:24,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:24 WrapperNode [2020-10-13 05:15:24,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:15:24,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:15:24,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:15:24,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:15:24,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:24" (1/1) ... [2020-10-13 05:15:24,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:24" (1/1) ... [2020-10-13 05:15:24,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:24" (1/1) ... [2020-10-13 05:15:24,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:24" (1/1) ... [2020-10-13 05:15:24,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:24" (1/1) ... [2020-10-13 05:15:24,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:24" (1/1) ... [2020-10-13 05:15:24,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:24" (1/1) ... [2020-10-13 05:15:24,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:15:24,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:15:24,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:15:24,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:15:24,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:15:24,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:15:24,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:15:24,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:15:24,687 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:15:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:15:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:15:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:15:24,687 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:15:24,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:15:24,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:15:24,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:15:24,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:15:24,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:15:24,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:15:24,989 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:15:24,989 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 05:15:24,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:15:24 BoogieIcfgContainer [2020-10-13 05:15:24,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:15:24,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:15:24,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:15:25,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:15:25,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:15:24" (1/3) ... [2020-10-13 05:15:25,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4977ebd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:15:25, skipping insertion in model container [2020-10-13 05:15:25,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:24" (2/3) ... [2020-10-13 05:15:25,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4977ebd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:15:25, skipping insertion in model container [2020-10-13 05:15:25,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:15:24" (3/3) ... [2020-10-13 05:15:25,004 INFO L109 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2020-10-13 05:15:25,018 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:15:25,026 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:15:25,042 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:15:25,071 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:15:25,071 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:15:25,071 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:15:25,071 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:15:25,072 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:15:25,072 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:15:25,072 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:15:25,072 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:15:25,095 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-13 05:15:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 05:15:25,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:25,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:25,104 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:25,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:25,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1656037931, now seen corresponding path program 1 times [2020-10-13 05:15:25,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:25,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713518824] [2020-10-13 05:15:25,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:25,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:25,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 05:15:25,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:25,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-13 05:15:25,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:25,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:25,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:15:25,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:25,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 05:15:25,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:25,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:25,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:25,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:25,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 05:15:25,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:25,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:25,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:25,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:25,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:15:25,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713518824] [2020-10-13 05:15:25,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:15:25,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:15:25,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171961388] [2020-10-13 05:15:25,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:15:25,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:25,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:15:25,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:15:25,640 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-13 05:15:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:25,750 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2020-10-13 05:15:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:15:25,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-13 05:15:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:25,763 INFO L225 Difference]: With dead ends: 46 [2020-10-13 05:15:25,763 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 05:15:25,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:15:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 05:15:25,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 05:15:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 05:15:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-10-13 05:15:25,808 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2020-10-13 05:15:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:25,809 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-10-13 05:15:25,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:15:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-10-13 05:15:25,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 05:15:25,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:25,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:25,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:15:25,811 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:25,812 INFO L82 PathProgramCache]: Analyzing trace with hash -533813011, now seen corresponding path program 1 times [2020-10-13 05:15:25,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:25,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198647635] [2020-10-13 05:15:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:25,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:25,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:25,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 05:15:25,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:25,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-13 05:15:25,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:15:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:25,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:15:25,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:26,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:26,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:26,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:26,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:26,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:26,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:15:26,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:26,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:26,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:26,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:26,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:15:26,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198647635] [2020-10-13 05:15:26,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:15:26,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:15:26,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723122716] [2020-10-13 05:15:26,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:15:26,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:26,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:15:26,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:15:26,045 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2020-10-13 05:15:26,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:26,177 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2020-10-13 05:15:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:15:26,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 05:15:26,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:26,179 INFO L225 Difference]: With dead ends: 45 [2020-10-13 05:15:26,180 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 05:15:26,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:15:26,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 05:15:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-10-13 05:15:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 05:15:26,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-13 05:15:26,190 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2020-10-13 05:15:26,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:26,190 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-13 05:15:26,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:15:26,191 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-13 05:15:26,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 05:15:26,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:26,192 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:26,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:15:26,193 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:26,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:26,194 INFO L82 PathProgramCache]: Analyzing trace with hash -414258795, now seen corresponding path program 1 times [2020-10-13 05:15:26,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:26,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343115416] [2020-10-13 05:15:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:26,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:26,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:26,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:26,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:27,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 05:15:27,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:15:27,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1155 [2020-10-13 05:15:27,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:15:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:15:27,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 05:15:27,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:27,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:27,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:27,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:27,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:27,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:27,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:27,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:27,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:27,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:27,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:15:27,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343115416] [2020-10-13 05:15:27,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:15:27,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 05:15:27,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684721798] [2020-10-13 05:15:27,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:15:27,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:27,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:15:27,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:15:27,453 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 6 states. [2020-10-13 05:15:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:27,596 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-10-13 05:15:27,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:15:27,596 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 05:15:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:27,600 INFO L225 Difference]: With dead ends: 51 [2020-10-13 05:15:27,600 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 05:15:27,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:15:27,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 05:15:27,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-13 05:15:27,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 05:15:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-13 05:15:27,609 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 22 [2020-10-13 05:15:27,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:27,609 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-13 05:15:27,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:15:27,609 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-13 05:15:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 05:15:27,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:27,610 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:27,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:15:27,611 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:27,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:27,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1694122473, now seen corresponding path program 1 times [2020-10-13 05:15:27,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:27,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435352026] [2020-10-13 05:15:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:27,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:27,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 05:15:27,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:27,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-13 05:15:27,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:27,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:15:27,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 05:15:27,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:15:27,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:27,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:27,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:27,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:27,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:27,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:27,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:27,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:27,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:27,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:27,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:15:27,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435352026] [2020-10-13 05:15:27,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:27,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:15:27,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669863195] [2020-10-13 05:15:27,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:15:27,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:27,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:15:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:15:27,765 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-10-13 05:15:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:27,882 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2020-10-13 05:15:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:15:27,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 05:15:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:27,884 INFO L225 Difference]: With dead ends: 62 [2020-10-13 05:15:27,884 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 05:15:27,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:15:27,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 05:15:27,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-10-13 05:15:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 05:15:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-13 05:15:27,893 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2020-10-13 05:15:27,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:27,894 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-13 05:15:27,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:15:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-13 05:15:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:15:27,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:27,895 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:27,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:15:27,896 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:27,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:27,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1083865171, now seen corresponding path program 2 times [2020-10-13 05:15:27,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:27,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046035227] [2020-10-13 05:15:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:27,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:27,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:28,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:28,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 05:15:28,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:28,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-13 05:15:28,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:28,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:15:28,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:15:28,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:15:28,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:28,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:28,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:28,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:28,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:28,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:28,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:28,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:28,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:28,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:28,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:28,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 05:15:28,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046035227] [2020-10-13 05:15:28,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:28,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:15:28,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666056147] [2020-10-13 05:15:28,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:15:28,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:28,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:15:28,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:15:28,152 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2020-10-13 05:15:28,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:28,283 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2020-10-13 05:15:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:15:28,284 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-13 05:15:28,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:28,285 INFO L225 Difference]: With dead ends: 76 [2020-10-13 05:15:28,285 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 05:15:28,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:15:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 05:15:28,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-10-13 05:15:28,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 05:15:28,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-10-13 05:15:28,295 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 30 [2020-10-13 05:15:28,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:28,295 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-10-13 05:15:28,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:15:28,296 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-10-13 05:15:28,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 05:15:28,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:28,297 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:28,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:15:28,298 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:28,298 INFO L82 PathProgramCache]: Analyzing trace with hash -664128169, now seen corresponding path program 3 times [2020-10-13 05:15:28,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:28,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641726703] [2020-10-13 05:15:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:28,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:28,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:28,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:28,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 05:15:28,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:28,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-13 05:15:28,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:28,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:15:28,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:15:28,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:15:28,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:28,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:28,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:28,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:28,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:28,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:28,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:15:28,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:28,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:28,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:28,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:28,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 05:15:28,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641726703] [2020-10-13 05:15:28,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:28,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:15:28,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272744631] [2020-10-13 05:15:28,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:15:28,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:28,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:15:28,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:15:28,744 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 7 states. [2020-10-13 05:15:28,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:28,919 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-10-13 05:15:28,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:15:28,920 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-13 05:15:28,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:28,921 INFO L225 Difference]: With dead ends: 90 [2020-10-13 05:15:28,921 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 05:15:28,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:15:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 05:15:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2020-10-13 05:15:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 05:15:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2020-10-13 05:15:28,930 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 38 [2020-10-13 05:15:28,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:28,931 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2020-10-13 05:15:28,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:15:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2020-10-13 05:15:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 05:15:28,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:28,933 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:28,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:15:28,934 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:28,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:28,934 INFO L82 PathProgramCache]: Analyzing trace with hash 304191085, now seen corresponding path program 4 times [2020-10-13 05:15:28,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:28,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035251965] [2020-10-13 05:15:28,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:28,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:28,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:29,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:29,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:15:29,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:29,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-13 05:15:29,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:29,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:15:29,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 05:15:29,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 05:15:29,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:29,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:29,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:29,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:29,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:29,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:29,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:29,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:29,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:29,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:29,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:29,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-13 05:15:29,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035251965] [2020-10-13 05:15:29,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:29,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:15:29,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734381618] [2020-10-13 05:15:29,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:15:29,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:29,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:15:29,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:15:29,654 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand 8 states. [2020-10-13 05:15:29,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:29,829 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2020-10-13 05:15:29,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:15:29,830 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-13 05:15:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:29,831 INFO L225 Difference]: With dead ends: 104 [2020-10-13 05:15:29,831 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 05:15:29,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:15:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 05:15:29,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-10-13 05:15:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 05:15:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2020-10-13 05:15:29,842 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 46 [2020-10-13 05:15:29,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:29,842 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2020-10-13 05:15:29,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:15:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2020-10-13 05:15:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:15:29,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:29,845 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:29,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:15:29,845 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:29,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:29,846 INFO L82 PathProgramCache]: Analyzing trace with hash -828408681, now seen corresponding path program 5 times [2020-10-13 05:15:29,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:29,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849193213] [2020-10-13 05:15:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:29,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:29,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:30,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:30,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:15:30,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:30,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 931 [2020-10-13 05:15:30,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:30,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:15:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 05:15:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:15:30,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:30,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:30,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:30,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:30,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:30,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:30,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:30,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:30,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:30,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:30,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:30,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-13 05:15:30,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849193213] [2020-10-13 05:15:30,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:30,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:15:30,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039405883] [2020-10-13 05:15:30,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:15:30,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:30,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:15:30,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:15:30,897 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand 9 states. [2020-10-13 05:15:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:31,080 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2020-10-13 05:15:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:15:31,080 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-10-13 05:15:31,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:31,082 INFO L225 Difference]: With dead ends: 118 [2020-10-13 05:15:31,082 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 05:15:31,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:15:31,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 05:15:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-10-13 05:15:31,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 05:15:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2020-10-13 05:15:31,091 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 54 [2020-10-13 05:15:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:31,091 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2020-10-13 05:15:31,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:15:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2020-10-13 05:15:31,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 05:15:31,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:31,093 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:31,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:15:31,093 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:31,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:31,094 INFO L82 PathProgramCache]: Analyzing trace with hash 893310253, now seen corresponding path program 6 times [2020-10-13 05:15:31,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:31,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980552768] [2020-10-13 05:15:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:31,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:31,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:31,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:31,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:15:31,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:31,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-13 05:15:31,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:31,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:15:31,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 05:15:31,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 05:15:31,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:31,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:31,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:31,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:31,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:31,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:31,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:31,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:31,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 05:15:31,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980552768] [2020-10-13 05:15:31,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:31,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:15:31,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811637837] [2020-10-13 05:15:31,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:15:31,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:31,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:15:31,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:15:31,959 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand 10 states. [2020-10-13 05:15:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:32,240 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2020-10-13 05:15:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:15:32,241 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-10-13 05:15:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:32,242 INFO L225 Difference]: With dead ends: 132 [2020-10-13 05:15:32,242 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 05:15:32,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:15:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 05:15:32,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2020-10-13 05:15:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 05:15:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2020-10-13 05:15:32,252 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 62 [2020-10-13 05:15:32,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:32,252 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2020-10-13 05:15:32,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:15:32,253 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2020-10-13 05:15:32,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 05:15:32,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:32,254 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:32,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:15:32,254 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:32,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:32,255 INFO L82 PathProgramCache]: Analyzing trace with hash -615935017, now seen corresponding path program 7 times [2020-10-13 05:15:32,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:32,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96329325] [2020-10-13 05:15:32,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:32,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:32,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:33,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:33,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 05:15:33,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:33,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1175 [2020-10-13 05:15:33,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:33,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:15:33,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 05:15:33,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:15:33,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:33,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:33,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:33,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:33,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:33,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:33,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:33,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:33,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:33,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:33,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:33,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 05:15:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 05:15:33,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96329325] [2020-10-13 05:15:33,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:33,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:15:33,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677561503] [2020-10-13 05:15:33,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:15:33,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:33,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:15:33,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:15:33,577 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand 11 states. [2020-10-13 05:15:33,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:33,811 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2020-10-13 05:15:33,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:15:33,812 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-13 05:15:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:33,813 INFO L225 Difference]: With dead ends: 146 [2020-10-13 05:15:33,813 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 05:15:33,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:15:33,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 05:15:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2020-10-13 05:15:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 05:15:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 132 transitions. [2020-10-13 05:15:33,831 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 132 transitions. Word has length 70 [2020-10-13 05:15:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:33,832 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 132 transitions. [2020-10-13 05:15:33,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:15:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 132 transitions. [2020-10-13 05:15:33,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 05:15:33,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:33,834 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:33,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:15:33,839 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:33,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:33,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1889092589, now seen corresponding path program 8 times [2020-10-13 05:15:33,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:33,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345309693] [2020-10-13 05:15:33,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:33,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:34,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:35,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:35,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 05:15:35,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:35,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1530 [2020-10-13 05:15:35,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:35,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:15:35,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 05:15:35,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 05:15:35,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:35,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:35,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:35,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:35,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:35,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:35,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:35,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:35,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:35,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:35,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:35,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-10-13 05:15:35,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345309693] [2020-10-13 05:15:35,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:35,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:15:35,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093837211] [2020-10-13 05:15:35,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:15:35,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:35,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:15:35,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:15:35,551 INFO L87 Difference]: Start difference. First operand 106 states and 132 transitions. Second operand 12 states. [2020-10-13 05:15:35,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:35,832 INFO L93 Difference]: Finished difference Result 160 states and 195 transitions. [2020-10-13 05:15:35,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:15:35,833 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2020-10-13 05:15:35,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:35,834 INFO L225 Difference]: With dead ends: 160 [2020-10-13 05:15:35,834 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 05:15:35,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:15:35,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 05:15:35,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2020-10-13 05:15:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 05:15:35,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 146 transitions. [2020-10-13 05:15:35,842 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 146 transitions. Word has length 78 [2020-10-13 05:15:35,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:35,843 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 146 transitions. [2020-10-13 05:15:35,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:15:35,843 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 146 transitions. [2020-10-13 05:15:35,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 05:15:35,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:35,845 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:35,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:15:35,845 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:35,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1861453033, now seen corresponding path program 9 times [2020-10-13 05:15:35,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:35,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925927050] [2020-10-13 05:15:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:35,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:35,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:39,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:39,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 05:15:39,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:39,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3580 [2020-10-13 05:15:39,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:39,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:15:39,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-13 05:15:39,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:15:39,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:39,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:39,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:39,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:39,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:39,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:39,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:39,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:39,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:39,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:39,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:39,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-10-13 05:15:39,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925927050] [2020-10-13 05:15:39,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:39,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:15:39,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475097916] [2020-10-13 05:15:39,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:15:39,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:39,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:15:39,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:15:39,606 INFO L87 Difference]: Start difference. First operand 117 states and 146 transitions. Second operand 13 states. [2020-10-13 05:15:39,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:39,900 INFO L93 Difference]: Finished difference Result 174 states and 212 transitions. [2020-10-13 05:15:39,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:15:39,900 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 86 [2020-10-13 05:15:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:39,902 INFO L225 Difference]: With dead ends: 174 [2020-10-13 05:15:39,902 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 05:15:39,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:15:39,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 05:15:39,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2020-10-13 05:15:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 05:15:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 160 transitions. [2020-10-13 05:15:39,913 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 160 transitions. Word has length 86 [2020-10-13 05:15:39,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:39,914 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 160 transitions. [2020-10-13 05:15:39,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:15:39,914 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 160 transitions. [2020-10-13 05:15:39,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 05:15:39,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:39,920 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:39,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:15:39,921 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:39,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:39,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1223892307, now seen corresponding path program 10 times [2020-10-13 05:15:39,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:39,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780976101] [2020-10-13 05:15:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:39,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:40,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:42,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:42,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 05:15:42,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:42,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2104 [2020-10-13 05:15:42,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:42,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:15:42,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 05:15:42,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 05:15:42,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:42,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:42,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:42,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:42,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:42,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:42,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:15:42,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:42,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:42,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-10-13 05:15:42,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780976101] [2020-10-13 05:15:42,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:42,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:15:42,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217913508] [2020-10-13 05:15:42,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:15:42,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:42,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:15:42,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:15:42,205 INFO L87 Difference]: Start difference. First operand 128 states and 160 transitions. Second operand 14 states. [2020-10-13 05:15:42,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:42,467 INFO L93 Difference]: Finished difference Result 188 states and 229 transitions. [2020-10-13 05:15:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:15:42,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 94 [2020-10-13 05:15:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:42,469 INFO L225 Difference]: With dead ends: 188 [2020-10-13 05:15:42,469 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 05:15:42,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:15:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 05:15:42,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 139. [2020-10-13 05:15:42,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 05:15:42,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 174 transitions. [2020-10-13 05:15:42,476 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 174 transitions. Word has length 94 [2020-10-13 05:15:42,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:42,476 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 174 transitions. [2020-10-13 05:15:42,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:15:42,476 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 174 transitions. [2020-10-13 05:15:42,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 05:15:42,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:42,478 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:42,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:15:42,478 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:42,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:42,479 INFO L82 PathProgramCache]: Analyzing trace with hash -141807017, now seen corresponding path program 11 times [2020-10-13 05:15:42,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:42,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171675713] [2020-10-13 05:15:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:42,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:42,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:44,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:44,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 05:15:44,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:44,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2258 [2020-10-13 05:15:44,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:44,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:15:44,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-13 05:15:44,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 05:15:44,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:44,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:44,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:44,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:44,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:44,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:44,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:44,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:44,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:44,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:44,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:44,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2020-10-13 05:15:44,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171675713] [2020-10-13 05:15:44,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:44,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:15:44,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028536965] [2020-10-13 05:15:44,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:15:44,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:44,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:15:44,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:15:44,954 INFO L87 Difference]: Start difference. First operand 139 states and 174 transitions. Second operand 15 states. [2020-10-13 05:15:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:45,249 INFO L93 Difference]: Finished difference Result 202 states and 246 transitions. [2020-10-13 05:15:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:15:45,249 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 102 [2020-10-13 05:15:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:45,251 INFO L225 Difference]: With dead ends: 202 [2020-10-13 05:15:45,251 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 05:15:45,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:15:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 05:15:45,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2020-10-13 05:15:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 05:15:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2020-10-13 05:15:45,257 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 102 [2020-10-13 05:15:45,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:45,258 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2020-10-13 05:15:45,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:15:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2020-10-13 05:15:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 05:15:45,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:45,259 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:45,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:15:45,260 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:45,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:45,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1718989165, now seen corresponding path program 12 times [2020-10-13 05:15:45,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:45,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51929640] [2020-10-13 05:15:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:45,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:45,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:49,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:49,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 05:15:49,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:49,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4258 [2020-10-13 05:15:49,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:49,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:15:49,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 05:15:49,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 05:15:49,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:49,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:49,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:49,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:49,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:49,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:49,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:49,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:49,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:49,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:49,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:49,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-13 05:15:49,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51929640] [2020-10-13 05:15:49,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:49,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:15:49,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311290009] [2020-10-13 05:15:49,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:15:49,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:49,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:15:49,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:15:49,718 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand 16 states. [2020-10-13 05:15:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:49,975 INFO L93 Difference]: Finished difference Result 216 states and 263 transitions. [2020-10-13 05:15:49,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:15:49,976 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 110 [2020-10-13 05:15:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:49,977 INFO L225 Difference]: With dead ends: 216 [2020-10-13 05:15:49,977 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 05:15:49,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:15:49,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 05:15:49,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 161. [2020-10-13 05:15:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-13 05:15:49,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 202 transitions. [2020-10-13 05:15:49,985 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 202 transitions. Word has length 110 [2020-10-13 05:15:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:49,985 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 202 transitions. [2020-10-13 05:15:49,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:15:49,986 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 202 transitions. [2020-10-13 05:15:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 05:15:49,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:49,988 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:49,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:15:49,988 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:49,989 INFO L82 PathProgramCache]: Analyzing trace with hash -882067049, now seen corresponding path program 13 times [2020-10-13 05:15:49,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:49,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139558203] [2020-10-13 05:15:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:50,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:50,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:52,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:52,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 05:15:52,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:52,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2210 [2020-10-13 05:15:52,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:52,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:15:52,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-13 05:15:52,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:15:52,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:52,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:52,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:52,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:52,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:52,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:52,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:52,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:52,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:52,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:52,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:52,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2020-10-13 05:15:52,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139558203] [2020-10-13 05:15:52,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:52,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:15:52,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304592985] [2020-10-13 05:15:52,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:15:52,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:52,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:15:52,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:15:52,472 INFO L87 Difference]: Start difference. First operand 161 states and 202 transitions. Second operand 17 states. [2020-10-13 05:15:52,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:52,846 INFO L93 Difference]: Finished difference Result 230 states and 280 transitions. [2020-10-13 05:15:52,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:15:52,846 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 118 [2020-10-13 05:15:52,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:52,848 INFO L225 Difference]: With dead ends: 230 [2020-10-13 05:15:52,848 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 05:15:52,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:15:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 05:15:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2020-10-13 05:15:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 05:15:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 216 transitions. [2020-10-13 05:15:52,856 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 216 transitions. Word has length 118 [2020-10-13 05:15:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:52,856 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 216 transitions. [2020-10-13 05:15:52,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:15:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 216 transitions. [2020-10-13 05:15:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 05:15:52,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:52,858 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:52,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:15:52,859 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:52,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:52,859 INFO L82 PathProgramCache]: Analyzing trace with hash 128954413, now seen corresponding path program 14 times [2020-10-13 05:15:52,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:52,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793001907] [2020-10-13 05:15:52,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:52,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:53,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:56,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 05:15:56,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:56,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3158 [2020-10-13 05:15:56,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:56,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:15:56,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 05:15:56,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 05:15:56,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:56,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:56,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:56,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:56,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:56,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:56,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:56,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:15:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2020-10-13 05:15:56,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793001907] [2020-10-13 05:15:56,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:56,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:15:56,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633909330] [2020-10-13 05:15:56,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:15:56,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:56,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:15:56,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:15:56,256 INFO L87 Difference]: Start difference. First operand 172 states and 216 transitions. Second operand 18 states. [2020-10-13 05:15:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:56,596 INFO L93 Difference]: Finished difference Result 244 states and 297 transitions. [2020-10-13 05:15:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:15:56,597 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 126 [2020-10-13 05:15:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:56,598 INFO L225 Difference]: With dead ends: 244 [2020-10-13 05:15:56,598 INFO L226 Difference]: Without dead ends: 191 [2020-10-13 05:15:56,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:15:56,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-13 05:15:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 183. [2020-10-13 05:15:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-13 05:15:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 230 transitions. [2020-10-13 05:15:56,606 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 230 transitions. Word has length 126 [2020-10-13 05:15:56,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:56,606 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 230 transitions. [2020-10-13 05:15:56,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:15:56,606 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 230 transitions. [2020-10-13 05:15:56,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 05:15:56,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:56,608 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:56,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:15:56,608 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:56,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1101917993, now seen corresponding path program 15 times [2020-10-13 05:15:56,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:56,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530796016] [2020-10-13 05:15:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:56,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:56,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:59,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:59,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 05:15:59,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:15:59,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2643 [2020-10-13 05:15:59,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:15:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-13 05:15:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 05:15:59,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:59,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:15:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:59,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:59,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:59,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:15:59,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:15:59,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:15:59,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:15:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:15:59,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:15:59,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2020-10-13 05:15:59,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530796016] [2020-10-13 05:15:59,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:15:59,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:15:59,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798069188] [2020-10-13 05:15:59,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:15:59,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:15:59,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:15:59,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:15:59,509 INFO L87 Difference]: Start difference. First operand 183 states and 230 transitions. Second operand 19 states. [2020-10-13 05:15:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:15:59,839 INFO L93 Difference]: Finished difference Result 258 states and 314 transitions. [2020-10-13 05:15:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:15:59,839 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 134 [2020-10-13 05:15:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:15:59,841 INFO L225 Difference]: With dead ends: 258 [2020-10-13 05:15:59,841 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 05:15:59,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:15:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 05:15:59,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-10-13 05:15:59,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-13 05:15:59,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 244 transitions. [2020-10-13 05:15:59,851 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 244 transitions. Word has length 134 [2020-10-13 05:15:59,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:15:59,851 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 244 transitions. [2020-10-13 05:15:59,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:15:59,852 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 244 transitions. [2020-10-13 05:15:59,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 05:15:59,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:15:59,853 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:15:59,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:15:59,854 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:15:59,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:15:59,854 INFO L82 PathProgramCache]: Analyzing trace with hash 244768493, now seen corresponding path program 16 times [2020-10-13 05:15:59,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:15:59,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86168434] [2020-10-13 05:15:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:15:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:15:59,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:00,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:02,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:02,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 05:16:02,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:02,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3049 [2020-10-13 05:16:02,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:02,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:16:02,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 05:16:02,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 05:16:02,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:03,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:03,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:03,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:03,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:03,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:03,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:16:03,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:03,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:03,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:03,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:03,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2020-10-13 05:16:03,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86168434] [2020-10-13 05:16:03,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:03,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:16:03,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951898240] [2020-10-13 05:16:03,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:16:03,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:03,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:16:03,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:16:03,169 INFO L87 Difference]: Start difference. First operand 194 states and 244 transitions. Second operand 20 states. [2020-10-13 05:16:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:03,564 INFO L93 Difference]: Finished difference Result 272 states and 331 transitions. [2020-10-13 05:16:03,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:16:03,565 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 142 [2020-10-13 05:16:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:03,566 INFO L225 Difference]: With dead ends: 272 [2020-10-13 05:16:03,566 INFO L226 Difference]: Without dead ends: 213 [2020-10-13 05:16:03,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:16:03,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-13 05:16:03,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2020-10-13 05:16:03,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-13 05:16:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 258 transitions. [2020-10-13 05:16:03,574 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 258 transitions. Word has length 142 [2020-10-13 05:16:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:03,574 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 258 transitions. [2020-10-13 05:16:03,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:16:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 258 transitions. [2020-10-13 05:16:03,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 05:16:03,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:03,576 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:03,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:16:03,577 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:03,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:03,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1226819561, now seen corresponding path program 17 times [2020-10-13 05:16:03,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:03,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005268270] [2020-10-13 05:16:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:03,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:03,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:06,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:06,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 05:16:06,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:06,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3361 [2020-10-13 05:16:06,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:06,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:16:06,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-13 05:16:06,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:16:06,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:07,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:07,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:07,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:07,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:07,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:07,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:16:07,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:07,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:07,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:07,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:07,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2020-10-13 05:16:07,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005268270] [2020-10-13 05:16:07,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:07,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:16:07,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455577062] [2020-10-13 05:16:07,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:16:07,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:07,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:16:07,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:16:07,229 INFO L87 Difference]: Start difference. First operand 205 states and 258 transitions. Second operand 21 states. [2020-10-13 05:16:07,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:07,673 INFO L93 Difference]: Finished difference Result 286 states and 348 transitions. [2020-10-13 05:16:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:16:07,673 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 150 [2020-10-13 05:16:07,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:07,676 INFO L225 Difference]: With dead ends: 286 [2020-10-13 05:16:07,676 INFO L226 Difference]: Without dead ends: 224 [2020-10-13 05:16:07,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:16:07,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-13 05:16:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 216. [2020-10-13 05:16:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-13 05:16:07,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 272 transitions. [2020-10-13 05:16:07,684 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 272 transitions. Word has length 150 [2020-10-13 05:16:07,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:07,684 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 272 transitions. [2020-10-13 05:16:07,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:16:07,685 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 272 transitions. [2020-10-13 05:16:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-13 05:16:07,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:07,686 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:07,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:16:07,687 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:07,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1710801491, now seen corresponding path program 18 times [2020-10-13 05:16:07,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:07,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305811155] [2020-10-13 05:16:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:07,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:07,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:11,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:11,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-13 05:16:11,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:11,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3721 [2020-10-13 05:16:11,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:11,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:16:11,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-13 05:16:11,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 05:16:11,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:11,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:11,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:11,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:11,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:11,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:11,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:16:11,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:11,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-10-13 05:16:11,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305811155] [2020-10-13 05:16:11,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:11,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:16:11,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795956103] [2020-10-13 05:16:11,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:16:11,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:11,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:16:11,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:16:11,714 INFO L87 Difference]: Start difference. First operand 216 states and 272 transitions. Second operand 22 states. [2020-10-13 05:16:12,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:12,166 INFO L93 Difference]: Finished difference Result 300 states and 365 transitions. [2020-10-13 05:16:12,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:16:12,166 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 158 [2020-10-13 05:16:12,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:12,169 INFO L225 Difference]: With dead ends: 300 [2020-10-13 05:16:12,169 INFO L226 Difference]: Without dead ends: 235 [2020-10-13 05:16:12,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:16:12,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-13 05:16:12,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 227. [2020-10-13 05:16:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-13 05:16:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 286 transitions. [2020-10-13 05:16:12,178 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 286 transitions. Word has length 158 [2020-10-13 05:16:12,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:12,178 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 286 transitions. [2020-10-13 05:16:12,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:16:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 286 transitions. [2020-10-13 05:16:12,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 05:16:12,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:12,181 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:12,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:16:12,181 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:12,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:12,181 INFO L82 PathProgramCache]: Analyzing trace with hash 280702807, now seen corresponding path program 19 times [2020-10-13 05:16:12,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:12,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276315898] [2020-10-13 05:16:12,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:12,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:12,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:16,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:16,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 05:16:16,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:16,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4449 [2020-10-13 05:16:16,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:16,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:16:16,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 108 [2020-10-13 05:16:16,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 05:16:16,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:16,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:16,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:16,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:16,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:16,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:16,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:16:16,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:16,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:16,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:16,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:16,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2020-10-13 05:16:16,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276315898] [2020-10-13 05:16:16,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:16,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:16:16,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647880609] [2020-10-13 05:16:16,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:16:16,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:16,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:16:16,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:16:16,939 INFO L87 Difference]: Start difference. First operand 227 states and 286 transitions. Second operand 23 states. [2020-10-13 05:16:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:17,381 INFO L93 Difference]: Finished difference Result 314 states and 382 transitions. [2020-10-13 05:16:17,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:16:17,381 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 166 [2020-10-13 05:16:17,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:17,383 INFO L225 Difference]: With dead ends: 314 [2020-10-13 05:16:17,383 INFO L226 Difference]: Without dead ends: 246 [2020-10-13 05:16:17,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:16:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-13 05:16:17,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 238. [2020-10-13 05:16:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-13 05:16:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 300 transitions. [2020-10-13 05:16:17,391 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 300 transitions. Word has length 166 [2020-10-13 05:16:17,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:17,392 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 300 transitions. [2020-10-13 05:16:17,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:16:17,392 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 300 transitions. [2020-10-13 05:16:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-13 05:16:17,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:17,394 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:17,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:16:17,395 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:17,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:17,395 INFO L82 PathProgramCache]: Analyzing trace with hash 870108269, now seen corresponding path program 20 times [2020-10-13 05:16:17,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:17,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107790193] [2020-10-13 05:16:17,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:17,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:17,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:22,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:22,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-13 05:16:22,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:22,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 05:16:22,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:22,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:16:22,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-13 05:16:22,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 05:16:22,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:22,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:22,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:22,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:22,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:22,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:22,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:16:22,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:22,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:22,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:22,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:22,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2020-10-13 05:16:22,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107790193] [2020-10-13 05:16:22,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:22,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:16:22,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577161592] [2020-10-13 05:16:22,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:16:22,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:22,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:16:22,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:16:22,790 INFO L87 Difference]: Start difference. First operand 238 states and 300 transitions. Second operand 24 states. [2020-10-13 05:16:23,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:23,226 INFO L93 Difference]: Finished difference Result 328 states and 399 transitions. [2020-10-13 05:16:23,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:16:23,227 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 174 [2020-10-13 05:16:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:23,229 INFO L225 Difference]: With dead ends: 328 [2020-10-13 05:16:23,229 INFO L226 Difference]: Without dead ends: 257 [2020-10-13 05:16:23,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:16:23,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-13 05:16:23,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 249. [2020-10-13 05:16:23,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-13 05:16:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 314 transitions. [2020-10-13 05:16:23,239 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 314 transitions. Word has length 174 [2020-10-13 05:16:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:23,239 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 314 transitions. [2020-10-13 05:16:23,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:16:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 314 transitions. [2020-10-13 05:16:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-13 05:16:23,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:23,241 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:23,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:16:23,241 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash -595134825, now seen corresponding path program 21 times [2020-10-13 05:16:23,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:23,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561300485] [2020-10-13 05:16:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:23,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:23,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:28,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:28,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-13 05:16:28,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:28,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:16:28,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:28,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:16:28,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 118 [2020-10-13 05:16:28,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 05:16:28,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:28,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:28,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:28,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:28,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:28,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:28,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:16:28,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:28,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:28,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:28,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:28,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2020-10-13 05:16:28,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561300485] [2020-10-13 05:16:28,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:28,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:16:28,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430693375] [2020-10-13 05:16:28,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:16:28,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:28,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:16:28,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:16:28,617 INFO L87 Difference]: Start difference. First operand 249 states and 314 transitions. Second operand 25 states. [2020-10-13 05:16:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:29,136 INFO L93 Difference]: Finished difference Result 342 states and 416 transitions. [2020-10-13 05:16:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:16:29,137 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 182 [2020-10-13 05:16:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:29,139 INFO L225 Difference]: With dead ends: 342 [2020-10-13 05:16:29,139 INFO L226 Difference]: Without dead ends: 268 [2020-10-13 05:16:29,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:16:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-13 05:16:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 260. [2020-10-13 05:16:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-13 05:16:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 328 transitions. [2020-10-13 05:16:29,148 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 328 transitions. Word has length 182 [2020-10-13 05:16:29,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:29,149 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 328 transitions. [2020-10-13 05:16:29,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:16:29,149 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 328 transitions. [2020-10-13 05:16:29,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-13 05:16:29,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:29,150 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:29,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:16:29,151 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:29,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:29,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1863087315, now seen corresponding path program 22 times [2020-10-13 05:16:29,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:29,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716993387] [2020-10-13 05:16:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:29,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:29,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:34,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:34,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-13 05:16:34,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:34,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:16:34,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:34,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:16:34,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-10-13 05:16:34,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 05:16:34,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:34,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:34,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:34,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:34,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:34,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:34,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:16:34,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:34,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:34,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:34,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:34,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2020-10-13 05:16:34,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716993387] [2020-10-13 05:16:34,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:34,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:16:34,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643144449] [2020-10-13 05:16:34,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:16:34,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:34,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:16:34,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:16:34,543 INFO L87 Difference]: Start difference. First operand 260 states and 328 transitions. Second operand 26 states. [2020-10-13 05:16:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:35,089 INFO L93 Difference]: Finished difference Result 356 states and 433 transitions. [2020-10-13 05:16:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:16:35,090 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 190 [2020-10-13 05:16:35,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:35,092 INFO L225 Difference]: With dead ends: 356 [2020-10-13 05:16:35,092 INFO L226 Difference]: Without dead ends: 279 [2020-10-13 05:16:35,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:16:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-13 05:16:35,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 271. [2020-10-13 05:16:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-13 05:16:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 342 transitions. [2020-10-13 05:16:35,111 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 342 transitions. Word has length 190 [2020-10-13 05:16:35,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:35,112 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 342 transitions. [2020-10-13 05:16:35,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:16:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 342 transitions. [2020-10-13 05:16:35,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-13 05:16:35,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:35,113 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:35,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:16:35,114 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:35,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:35,114 INFO L82 PathProgramCache]: Analyzing trace with hash 535268823, now seen corresponding path program 23 times [2020-10-13 05:16:35,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:35,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047075578] [2020-10-13 05:16:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:35,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:35,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:40,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:40,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-10-13 05:16:40,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:40,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:16:40,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:40,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:16:40,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-13 05:16:40,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 05:16:40,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:40,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:40,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:40,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:40,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:40,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:40,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:16:40,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:40,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:40,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:40,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:40,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2020-10-13 05:16:40,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047075578] [2020-10-13 05:16:40,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:40,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:16:40,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141733148] [2020-10-13 05:16:40,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:16:40,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:40,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:16:40,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:16:40,636 INFO L87 Difference]: Start difference. First operand 271 states and 342 transitions. Second operand 27 states. [2020-10-13 05:16:41,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:41,128 INFO L93 Difference]: Finished difference Result 370 states and 450 transitions. [2020-10-13 05:16:41,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:16:41,129 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 198 [2020-10-13 05:16:41,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:41,131 INFO L225 Difference]: With dead ends: 370 [2020-10-13 05:16:41,132 INFO L226 Difference]: Without dead ends: 290 [2020-10-13 05:16:41,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:16:41,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-13 05:16:41,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 282. [2020-10-13 05:16:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-13 05:16:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 356 transitions. [2020-10-13 05:16:41,142 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 356 transitions. Word has length 198 [2020-10-13 05:16:41,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:41,142 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 356 transitions. [2020-10-13 05:16:41,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:16:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 356 transitions. [2020-10-13 05:16:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-13 05:16:41,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:41,144 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:41,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:16:41,144 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:41,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:41,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1361541613, now seen corresponding path program 24 times [2020-10-13 05:16:41,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:41,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807226875] [2020-10-13 05:16:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:41,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:41,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:46,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:46,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-13 05:16:46,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:46,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:16:46,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:46,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:16:46,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-13 05:16:46,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 05:16:46,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:46,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:46,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:46,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:46,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:46,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:46,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:16:46,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:46,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:46,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:46,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:46,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-10-13 05:16:46,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807226875] [2020-10-13 05:16:46,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:46,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:16:46,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055199808] [2020-10-13 05:16:46,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:16:46,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:46,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:16:46,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:16:46,619 INFO L87 Difference]: Start difference. First operand 282 states and 356 transitions. Second operand 28 states. [2020-10-13 05:16:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:47,121 INFO L93 Difference]: Finished difference Result 384 states and 467 transitions. [2020-10-13 05:16:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:16:47,121 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 206 [2020-10-13 05:16:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:47,124 INFO L225 Difference]: With dead ends: 384 [2020-10-13 05:16:47,124 INFO L226 Difference]: Without dead ends: 301 [2020-10-13 05:16:47,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:16:47,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-13 05:16:47,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 293. [2020-10-13 05:16:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-13 05:16:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 370 transitions. [2020-10-13 05:16:47,135 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 370 transitions. Word has length 206 [2020-10-13 05:16:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:47,136 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 370 transitions. [2020-10-13 05:16:47,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:16:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 370 transitions. [2020-10-13 05:16:47,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-13 05:16:47,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:47,137 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:47,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:16:47,138 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:47,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:47,138 INFO L82 PathProgramCache]: Analyzing trace with hash 360772887, now seen corresponding path program 25 times [2020-10-13 05:16:47,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:47,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678383121] [2020-10-13 05:16:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:47,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:47,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:52,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:52,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-10-13 05:16:52,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:52,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:16:52,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:52,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:16:52,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 138 [2020-10-13 05:16:52,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 05:16:52,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:52,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:52,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:52,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:52,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:52,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:52,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:16:52,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:52,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:52,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:52,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:52,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2020-10-13 05:16:52,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678383121] [2020-10-13 05:16:52,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:52,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:16:52,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607110843] [2020-10-13 05:16:52,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:16:52,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:52,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:16:52,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:16:52,642 INFO L87 Difference]: Start difference. First operand 293 states and 370 transitions. Second operand 29 states. [2020-10-13 05:16:53,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:53,248 INFO L93 Difference]: Finished difference Result 398 states and 484 transitions. [2020-10-13 05:16:53,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:16:53,249 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 214 [2020-10-13 05:16:53,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:53,251 INFO L225 Difference]: With dead ends: 398 [2020-10-13 05:16:53,251 INFO L226 Difference]: Without dead ends: 312 [2020-10-13 05:16:53,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:16:53,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-13 05:16:53,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 304. [2020-10-13 05:16:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-13 05:16:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 384 transitions. [2020-10-13 05:16:53,262 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 384 transitions. Word has length 214 [2020-10-13 05:16:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:53,263 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 384 transitions. [2020-10-13 05:16:53,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:16:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 384 transitions. [2020-10-13 05:16:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-13 05:16:53,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:53,265 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:53,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:16:53,265 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:53,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:53,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1084974931, now seen corresponding path program 26 times [2020-10-13 05:16:53,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:53,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352577971] [2020-10-13 05:16:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:53,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:53,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:58,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:58,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-13 05:16:58,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:58,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:16:58,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:58,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:16:58,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 143 [2020-10-13 05:16:58,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-13 05:16:58,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:58,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:58,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:58,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:58,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:58,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:58,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:16:58,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:58,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:58,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:58,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:58,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2020-10-13 05:16:58,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352577971] [2020-10-13 05:16:58,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:58,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:16:58,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015961983] [2020-10-13 05:16:58,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:16:58,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:58,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:16:58,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:16:58,798 INFO L87 Difference]: Start difference. First operand 304 states and 384 transitions. Second operand 30 states. [2020-10-13 05:16:59,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:59,380 INFO L93 Difference]: Finished difference Result 412 states and 501 transitions. [2020-10-13 05:16:59,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:16:59,381 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 222 [2020-10-13 05:16:59,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:59,384 INFO L225 Difference]: With dead ends: 412 [2020-10-13 05:16:59,384 INFO L226 Difference]: Without dead ends: 323 [2020-10-13 05:16:59,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:16:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-13 05:16:59,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 315. [2020-10-13 05:16:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-13 05:16:59,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 398 transitions. [2020-10-13 05:16:59,400 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 398 transitions. Word has length 222 [2020-10-13 05:16:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:59,400 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 398 transitions. [2020-10-13 05:16:59,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:16:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 398 transitions. [2020-10-13 05:16:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-13 05:16:59,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:59,403 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:59,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:16:59,403 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:59,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:59,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1828138071, now seen corresponding path program 27 times [2020-10-13 05:16:59,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:59,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409483408] [2020-10-13 05:16:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:59,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:00,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:04,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:04,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-13 05:17:04,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:04,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:17:04,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:04,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:17:04,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 148 [2020-10-13 05:17:04,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 05:17:04,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:04,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:04,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:04,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:04,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:04,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:04,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:17:04,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:04,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:04,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:04,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:04,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2020-10-13 05:17:04,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409483408] [2020-10-13 05:17:04,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:04,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:17:04,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172904004] [2020-10-13 05:17:04,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:17:04,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:04,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:17:04,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:17:04,993 INFO L87 Difference]: Start difference. First operand 315 states and 398 transitions. Second operand 31 states. [2020-10-13 05:17:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:05,667 INFO L93 Difference]: Finished difference Result 426 states and 518 transitions. [2020-10-13 05:17:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:17:05,667 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 230 [2020-10-13 05:17:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:05,670 INFO L225 Difference]: With dead ends: 426 [2020-10-13 05:17:05,671 INFO L226 Difference]: Without dead ends: 334 [2020-10-13 05:17:05,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:17:05,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-13 05:17:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 326. [2020-10-13 05:17:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-13 05:17:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 412 transitions. [2020-10-13 05:17:05,681 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 412 transitions. Word has length 230 [2020-10-13 05:17:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:05,682 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 412 transitions. [2020-10-13 05:17:05,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:17:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 412 transitions. [2020-10-13 05:17:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-13 05:17:05,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:05,684 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:05,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:17:05,684 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:05,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1856575635, now seen corresponding path program 28 times [2020-10-13 05:17:05,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:05,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923319917] [2020-10-13 05:17:05,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:05,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:06,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:10,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:10,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-13 05:17:10,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:10,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:17:10,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:10,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 05:17:10,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-13 05:17:10,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 05:17:10,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:11,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:11,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:11,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:11,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:11,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:11,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:17:11,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:11,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:11,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:11,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:11,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1918 trivial. 0 not checked. [2020-10-13 05:17:11,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923319917] [2020-10-13 05:17:11,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:11,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:17:11,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500960223] [2020-10-13 05:17:11,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:17:11,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:11,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:17:11,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:17:11,338 INFO L87 Difference]: Start difference. First operand 326 states and 412 transitions. Second operand 32 states. [2020-10-13 05:17:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:12,059 INFO L93 Difference]: Finished difference Result 440 states and 535 transitions. [2020-10-13 05:17:12,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:17:12,060 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 238 [2020-10-13 05:17:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:12,065 INFO L225 Difference]: With dead ends: 440 [2020-10-13 05:17:12,065 INFO L226 Difference]: Without dead ends: 345 [2020-10-13 05:17:12,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:17:12,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-13 05:17:12,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 337. [2020-10-13 05:17:12,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-13 05:17:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 426 transitions. [2020-10-13 05:17:12,082 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 426 transitions. Word has length 238 [2020-10-13 05:17:12,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:12,082 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 426 transitions. [2020-10-13 05:17:12,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:17:12,083 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 426 transitions. [2020-10-13 05:17:12,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-13 05:17:12,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:12,085 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:12,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:17:12,085 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:12,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1964100713, now seen corresponding path program 29 times [2020-10-13 05:17:12,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:12,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904294540] [2020-10-13 05:17:12,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:12,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:13,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:17,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:17,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-13 05:17:17,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:17,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:17:17,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:17,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:17:17,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-10-13 05:17:17,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 05:17:17,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:17,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:17,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:17,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:17,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:17,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:17,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:17:17,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:17,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:17,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:17,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:17,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2020-10-13 05:17:17,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904294540] [2020-10-13 05:17:17,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:17,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:17:17,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263627306] [2020-10-13 05:17:17,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:17:17,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:17,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:17:17,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:17:17,739 INFO L87 Difference]: Start difference. First operand 337 states and 426 transitions. Second operand 33 states. [2020-10-13 05:17:18,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:18,460 INFO L93 Difference]: Finished difference Result 454 states and 552 transitions. [2020-10-13 05:17:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:17:18,460 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 246 [2020-10-13 05:17:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:18,463 INFO L225 Difference]: With dead ends: 454 [2020-10-13 05:17:18,464 INFO L226 Difference]: Without dead ends: 356 [2020-10-13 05:17:18,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:17:18,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-13 05:17:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 348. [2020-10-13 05:17:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-13 05:17:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 440 transitions. [2020-10-13 05:17:18,476 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 440 transitions. Word has length 246 [2020-10-13 05:17:18,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:18,476 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 440 transitions. [2020-10-13 05:17:18,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:17:18,476 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 440 transitions. [2020-10-13 05:17:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-13 05:17:18,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:18,478 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:18,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:17:18,479 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:18,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:18,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1475713491, now seen corresponding path program 30 times [2020-10-13 05:17:18,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:18,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689687357] [2020-10-13 05:17:18,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:18,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:19,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:23,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:23,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-13 05:17:23,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:23,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:17:23,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:23,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:17:23,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-13 05:17:23,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-13 05:17:23,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:24,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:24,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:24,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:24,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:24,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:24,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:17:24,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:24,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:24,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:24,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:24,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2020-10-13 05:17:24,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689687357] [2020-10-13 05:17:24,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:24,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:17:24,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13124202] [2020-10-13 05:17:24,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:17:24,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:24,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:17:24,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:17:24,162 INFO L87 Difference]: Start difference. First operand 348 states and 440 transitions. Second operand 34 states. [2020-10-13 05:17:24,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:24,851 INFO L93 Difference]: Finished difference Result 468 states and 569 transitions. [2020-10-13 05:17:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:17:24,852 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 254 [2020-10-13 05:17:24,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:24,854 INFO L225 Difference]: With dead ends: 468 [2020-10-13 05:17:24,854 INFO L226 Difference]: Without dead ends: 367 [2020-10-13 05:17:24,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:17:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-13 05:17:24,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 359. [2020-10-13 05:17:24,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-10-13 05:17:24,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 454 transitions. [2020-10-13 05:17:24,876 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 454 transitions. Word has length 254 [2020-10-13 05:17:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:24,877 INFO L479 AbstractCegarLoop]: Abstraction has 359 states and 454 transitions. [2020-10-13 05:17:24,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:17:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 454 transitions. [2020-10-13 05:17:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-13 05:17:24,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:24,880 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:24,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:17:24,880 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:24,881 INFO L82 PathProgramCache]: Analyzing trace with hash -922088745, now seen corresponding path program 31 times [2020-10-13 05:17:24,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:24,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664353977] [2020-10-13 05:17:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:24,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:25,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:29,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:29,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-13 05:17:29,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:29,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:17:29,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:29,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:17:29,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-10-13 05:17:29,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 05:17:29,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:30,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:30,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:30,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:30,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:30,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:30,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:17:30,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:30,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:30,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:30,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:30,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 2356 trivial. 0 not checked. [2020-10-13 05:17:30,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664353977] [2020-10-13 05:17:30,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:30,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:17:30,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30385743] [2020-10-13 05:17:30,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:17:30,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:30,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:17:30,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:17:30,579 INFO L87 Difference]: Start difference. First operand 359 states and 454 transitions. Second operand 35 states. [2020-10-13 05:17:31,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:31,296 INFO L93 Difference]: Finished difference Result 482 states and 586 transitions. [2020-10-13 05:17:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:17:31,296 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 262 [2020-10-13 05:17:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:31,299 INFO L225 Difference]: With dead ends: 482 [2020-10-13 05:17:31,299 INFO L226 Difference]: Without dead ends: 378 [2020-10-13 05:17:31,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:17:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-13 05:17:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 370. [2020-10-13 05:17:31,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-13 05:17:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 468 transitions. [2020-10-13 05:17:31,311 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 468 transitions. Word has length 262 [2020-10-13 05:17:31,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:31,312 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 468 transitions. [2020-10-13 05:17:31,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:17:31,312 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 468 transitions. [2020-10-13 05:17:31,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-13 05:17:31,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:31,314 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:31,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:17:31,315 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:31,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:31,315 INFO L82 PathProgramCache]: Analyzing trace with hash -817163027, now seen corresponding path program 32 times [2020-10-13 05:17:31,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:31,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620489643] [2020-10-13 05:17:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:31,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:32,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:36,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:36,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-13 05:17:36,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:36,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 05:17:36,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:17:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-10-13 05:17:36,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-13 05:17:36,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:37,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:37,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:37,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:37,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:37,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:37,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:17:37,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:37,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:37,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:37,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:37,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2020-10-13 05:17:37,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620489643] [2020-10-13 05:17:37,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:37,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:17:37,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552578145] [2020-10-13 05:17:37,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:17:37,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:37,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:17:37,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:17:37,054 INFO L87 Difference]: Start difference. First operand 370 states and 468 transitions. Second operand 36 states. [2020-10-13 05:17:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:37,811 INFO L93 Difference]: Finished difference Result 496 states and 603 transitions. [2020-10-13 05:17:37,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:17:37,812 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 270 [2020-10-13 05:17:37,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:37,815 INFO L225 Difference]: With dead ends: 496 [2020-10-13 05:17:37,815 INFO L226 Difference]: Without dead ends: 389 [2020-10-13 05:17:37,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:17:37,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-13 05:17:37,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 381. [2020-10-13 05:17:37,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-13 05:17:37,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 482 transitions. [2020-10-13 05:17:37,832 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 482 transitions. Word has length 270 [2020-10-13 05:17:37,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:37,833 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 482 transitions. [2020-10-13 05:17:37,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:17:37,834 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 482 transitions. [2020-10-13 05:17:37,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-10-13 05:17:37,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:37,837 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:37,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 05:17:37,837 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:37,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:37,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1242648041, now seen corresponding path program 33 times [2020-10-13 05:17:37,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:37,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991715004] [2020-10-13 05:17:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:37,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:38,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:42,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:42,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-10-13 05:17:42,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:42,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:17:42,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:42,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 05:17:42,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 178 [2020-10-13 05:17:42,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-13 05:17:42,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:43,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:43,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:43,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:43,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:43,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:43,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:17:43,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:43,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:43,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:43,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:43,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2673 trivial. 0 not checked. [2020-10-13 05:17:43,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991715004] [2020-10-13 05:17:43,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:43,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 05:17:43,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653618694] [2020-10-13 05:17:43,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 05:17:43,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:43,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 05:17:43,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:17:43,630 INFO L87 Difference]: Start difference. First operand 381 states and 482 transitions. Second operand 37 states. [2020-10-13 05:17:44,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:44,389 INFO L93 Difference]: Finished difference Result 510 states and 620 transitions. [2020-10-13 05:17:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:17:44,390 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 278 [2020-10-13 05:17:44,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:44,391 INFO L225 Difference]: With dead ends: 510 [2020-10-13 05:17:44,392 INFO L226 Difference]: Without dead ends: 400 [2020-10-13 05:17:44,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:17:44,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-13 05:17:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 392. [2020-10-13 05:17:44,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-13 05:17:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 496 transitions. [2020-10-13 05:17:44,407 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 496 transitions. Word has length 278 [2020-10-13 05:17:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:44,407 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 496 transitions. [2020-10-13 05:17:44,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 05:17:44,407 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 496 transitions. [2020-10-13 05:17:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-10-13 05:17:44,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:44,410 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:44,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 05:17:44,410 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:44,410 INFO L82 PathProgramCache]: Analyzing trace with hash 2113205165, now seen corresponding path program 34 times [2020-10-13 05:17:44,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:44,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690267428] [2020-10-13 05:17:44,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:44,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:44,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:49,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:49,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 294 [2020-10-13 05:17:49,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:49,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 05:17:49,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:49,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 05:17:49,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 183 [2020-10-13 05:17:49,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-13 05:17:49,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:50,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:50,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:50,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:50,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:50,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:50,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:17:50,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:50,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:50,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:50,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:50,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 2839 trivial. 0 not checked. [2020-10-13 05:17:50,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690267428] [2020-10-13 05:17:50,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:50,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 05:17:50,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775142283] [2020-10-13 05:17:50,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 05:17:50,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:50,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 05:17:50,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:17:50,272 INFO L87 Difference]: Start difference. First operand 392 states and 496 transitions. Second operand 38 states. [2020-10-13 05:17:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:51,190 INFO L93 Difference]: Finished difference Result 524 states and 637 transitions. [2020-10-13 05:17:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 05:17:51,191 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 286 [2020-10-13 05:17:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:51,194 INFO L225 Difference]: With dead ends: 524 [2020-10-13 05:17:51,194 INFO L226 Difference]: Without dead ends: 411 [2020-10-13 05:17:51,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:17:51,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-13 05:17:51,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 403. [2020-10-13 05:17:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-13 05:17:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 510 transitions. [2020-10-13 05:17:51,211 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 510 transitions. Word has length 286 [2020-10-13 05:17:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:51,211 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 510 transitions. [2020-10-13 05:17:51,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 05:17:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 510 transitions. [2020-10-13 05:17:51,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-10-13 05:17:51,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:51,214 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:51,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 05:17:51,214 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:51,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1430268247, now seen corresponding path program 35 times [2020-10-13 05:17:51,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:51,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89352103] [2020-10-13 05:17:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:51,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:52,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:56,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:56,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 302 [2020-10-13 05:17:56,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:56,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 05:17:56,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:56,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 05:17:56,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 188 [2020-10-13 05:17:56,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-13 05:17:56,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:57,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:57,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:57,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:57,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:57,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:57,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:17:57,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:57,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:57,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:57,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:57,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 3010 trivial. 0 not checked. [2020-10-13 05:17:57,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89352103] [2020-10-13 05:17:57,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:57,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 05:17:57,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188846963] [2020-10-13 05:17:57,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 05:17:57,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:57,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 05:17:57,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:17:57,071 INFO L87 Difference]: Start difference. First operand 403 states and 510 transitions. Second operand 39 states. [2020-10-13 05:17:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:57,881 INFO L93 Difference]: Finished difference Result 538 states and 654 transitions. [2020-10-13 05:17:57,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 05:17:57,882 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 294 [2020-10-13 05:17:57,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:57,885 INFO L225 Difference]: With dead ends: 538 [2020-10-13 05:17:57,885 INFO L226 Difference]: Without dead ends: 422 [2020-10-13 05:17:57,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:17:57,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-13 05:17:57,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 414. [2020-10-13 05:17:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-13 05:17:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 524 transitions. [2020-10-13 05:17:57,896 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 524 transitions. Word has length 294 [2020-10-13 05:17:57,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:57,896 INFO L479 AbstractCegarLoop]: Abstraction has 414 states and 524 transitions. [2020-10-13 05:17:57,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 05:17:57,896 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 524 transitions. [2020-10-13 05:17:57,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-13 05:17:57,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:57,899 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:57,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 05:17:57,899 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:57,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:57,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1780219283, now seen corresponding path program 36 times [2020-10-13 05:17:57,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:57,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079180477] [2020-10-13 05:17:57,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:57,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:58,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:02,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:02,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-13 05:18:02,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:02,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:18:02,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:02,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 05:18:02,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 193 [2020-10-13 05:18:02,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-13 05:18:02,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:03,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:03,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:03,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:03,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:03,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:03,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:03,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:03,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 3186 trivial. 0 not checked. [2020-10-13 05:18:03,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079180477] [2020-10-13 05:18:03,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:03,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 05:18:03,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460479381] [2020-10-13 05:18:03,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 05:18:03,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 05:18:03,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 05:18:03,822 INFO L87 Difference]: Start difference. First operand 414 states and 524 transitions. Second operand 40 states. [2020-10-13 05:18:04,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:04,779 INFO L93 Difference]: Finished difference Result 552 states and 671 transitions. [2020-10-13 05:18:04,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 05:18:04,779 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 302 [2020-10-13 05:18:04,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:04,782 INFO L225 Difference]: With dead ends: 552 [2020-10-13 05:18:04,782 INFO L226 Difference]: Without dead ends: 433 [2020-10-13 05:18:04,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 05:18:04,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-10-13 05:18:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 425. [2020-10-13 05:18:04,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-13 05:18:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 538 transitions. [2020-10-13 05:18:04,794 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 538 transitions. Word has length 302 [2020-10-13 05:18:04,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:04,794 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 538 transitions. [2020-10-13 05:18:04,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 05:18:04,794 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 538 transitions. [2020-10-13 05:18:04,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-13 05:18:04,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:04,797 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:04,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 05:18:04,797 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:04,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:04,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1604481175, now seen corresponding path program 37 times [2020-10-13 05:18:04,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:04,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823237300] [2020-10-13 05:18:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:04,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:05,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:09,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:09,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-13 05:18:09,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:09,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:18:09,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:09,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 05:18:09,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 198 [2020-10-13 05:18:09,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-13 05:18:09,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:10,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:10,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:10,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:10,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:10,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:10,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:10,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:10,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:10,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:10,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:10,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 3367 trivial. 0 not checked. [2020-10-13 05:18:10,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823237300] [2020-10-13 05:18:10,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:10,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 05:18:10,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845734957] [2020-10-13 05:18:10,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 05:18:10,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:10,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 05:18:10,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:18:10,755 INFO L87 Difference]: Start difference. First operand 425 states and 538 transitions. Second operand 41 states. [2020-10-13 05:18:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:11,717 INFO L93 Difference]: Finished difference Result 566 states and 688 transitions. [2020-10-13 05:18:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 05:18:11,718 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 310 [2020-10-13 05:18:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:11,721 INFO L225 Difference]: With dead ends: 566 [2020-10-13 05:18:11,721 INFO L226 Difference]: Without dead ends: 444 [2020-10-13 05:18:11,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:18:11,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-10-13 05:18:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 436. [2020-10-13 05:18:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-10-13 05:18:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 552 transitions. [2020-10-13 05:18:11,730 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 552 transitions. Word has length 310 [2020-10-13 05:18:11,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:11,731 INFO L479 AbstractCegarLoop]: Abstraction has 436 states and 552 transitions. [2020-10-13 05:18:11,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 05:18:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 552 transitions. [2020-10-13 05:18:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-13 05:18:11,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:11,733 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:11,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 05:18:11,734 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:11,734 INFO L82 PathProgramCache]: Analyzing trace with hash 603210029, now seen corresponding path program 38 times [2020-10-13 05:18:11,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:11,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639545430] [2020-10-13 05:18:11,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:11,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:12,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:16,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:16,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-13 05:18:16,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:16,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:18:16,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 05:18:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 203 [2020-10-13 05:18:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-13 05:18:16,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:17,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:17,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:17,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:17,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:17,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:17,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:17,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:17,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:17,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:17,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:17,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 3553 trivial. 0 not checked. [2020-10-13 05:18:17,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639545430] [2020-10-13 05:18:17,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:17,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 05:18:17,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837211551] [2020-10-13 05:18:17,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 05:18:17,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:17,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 05:18:17,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:18:17,791 INFO L87 Difference]: Start difference. First operand 436 states and 552 transitions. Second operand 42 states. [2020-10-13 05:18:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:18,804 INFO L93 Difference]: Finished difference Result 580 states and 705 transitions. [2020-10-13 05:18:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 05:18:18,805 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 318 [2020-10-13 05:18:18,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:18,808 INFO L225 Difference]: With dead ends: 580 [2020-10-13 05:18:18,808 INFO L226 Difference]: Without dead ends: 455 [2020-10-13 05:18:18,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:18:18,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-13 05:18:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 447. [2020-10-13 05:18:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-10-13 05:18:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 566 transitions. [2020-10-13 05:18:18,821 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 566 transitions. Word has length 318 [2020-10-13 05:18:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:18,821 INFO L479 AbstractCegarLoop]: Abstraction has 447 states and 566 transitions. [2020-10-13 05:18:18,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 05:18:18,822 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 566 transitions. [2020-10-13 05:18:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-13 05:18:18,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:18,824 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:18,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 05:18:18,824 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:18,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:18,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2101770281, now seen corresponding path program 39 times [2020-10-13 05:18:18,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:18,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212350773] [2020-10-13 05:18:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:18,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:18,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:23,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:23,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-13 05:18:23,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:23,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 05:18:23,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:23,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 05:18:23,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 208 [2020-10-13 05:18:23,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-13 05:18:23,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:24,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:24,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:24,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:24,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:24,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:24,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:24,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:24,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:24,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2020-10-13 05:18:24,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212350773] [2020-10-13 05:18:24,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:24,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 05:18:24,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460199411] [2020-10-13 05:18:24,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 05:18:24,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:24,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 05:18:24,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:18:24,910 INFO L87 Difference]: Start difference. First operand 447 states and 566 transitions. Second operand 43 states. [2020-10-13 05:18:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:25,922 INFO L93 Difference]: Finished difference Result 594 states and 722 transitions. [2020-10-13 05:18:25,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 05:18:25,922 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 326 [2020-10-13 05:18:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:25,924 INFO L225 Difference]: With dead ends: 594 [2020-10-13 05:18:25,924 INFO L226 Difference]: Without dead ends: 466 [2020-10-13 05:18:25,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:18:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-13 05:18:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 458. [2020-10-13 05:18:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-13 05:18:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 580 transitions. [2020-10-13 05:18:25,934 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 580 transitions. Word has length 326 [2020-10-13 05:18:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:25,934 INFO L479 AbstractCegarLoop]: Abstraction has 458 states and 580 transitions. [2020-10-13 05:18:25,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 05:18:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 580 transitions. [2020-10-13 05:18:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-13 05:18:25,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:25,937 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:25,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 05:18:25,937 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:25,938 INFO L82 PathProgramCache]: Analyzing trace with hash 536981485, now seen corresponding path program 40 times [2020-10-13 05:18:25,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:25,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026935534] [2020-10-13 05:18:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:26,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:27,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:30,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:30,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 342 [2020-10-13 05:18:30,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:30,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 05:18:30,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:30,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 05:18:30,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 213 [2020-10-13 05:18:30,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-13 05:18:30,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:32,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:32,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:32,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:32,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:32,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:32,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:32,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:32,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:32,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:32,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:32,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 3940 trivial. 0 not checked. [2020-10-13 05:18:32,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026935534] [2020-10-13 05:18:32,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:32,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 05:18:32,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86652340] [2020-10-13 05:18:32,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 05:18:32,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:32,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 05:18:32,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 05:18:32,069 INFO L87 Difference]: Start difference. First operand 458 states and 580 transitions. Second operand 44 states. [2020-10-13 05:18:33,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:33,026 INFO L93 Difference]: Finished difference Result 608 states and 739 transitions. [2020-10-13 05:18:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 05:18:33,027 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 334 [2020-10-13 05:18:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:33,031 INFO L225 Difference]: With dead ends: 608 [2020-10-13 05:18:33,031 INFO L226 Difference]: Without dead ends: 477 [2020-10-13 05:18:33,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 05:18:33,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2020-10-13 05:18:33,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 469. [2020-10-13 05:18:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-13 05:18:33,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 594 transitions. [2020-10-13 05:18:33,042 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 594 transitions. Word has length 334 [2020-10-13 05:18:33,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:33,043 INFO L479 AbstractCegarLoop]: Abstraction has 469 states and 594 transitions. [2020-10-13 05:18:33,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 05:18:33,043 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 594 transitions. [2020-10-13 05:18:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-10-13 05:18:33,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:33,046 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:33,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 05:18:33,046 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:33,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1591120105, now seen corresponding path program 41 times [2020-10-13 05:18:33,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:33,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124030406] [2020-10-13 05:18:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:33,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:34,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:38,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:38,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 350 [2020-10-13 05:18:38,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:38,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 05:18:38,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:38,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 05:18:38,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 218 [2020-10-13 05:18:38,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-13 05:18:38,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:39,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:39,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:39,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:39,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:39,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:39,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:39,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:39,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:39,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:39,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:39,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6683 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 4141 trivial. 0 not checked. [2020-10-13 05:18:39,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124030406] [2020-10-13 05:18:39,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:39,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 05:18:39,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800397821] [2020-10-13 05:18:39,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 05:18:39,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:39,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 05:18:39,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:18:39,230 INFO L87 Difference]: Start difference. First operand 469 states and 594 transitions. Second operand 45 states. [2020-10-13 05:18:40,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:40,236 INFO L93 Difference]: Finished difference Result 622 states and 756 transitions. [2020-10-13 05:18:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 05:18:40,238 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 342 [2020-10-13 05:18:40,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:40,241 INFO L225 Difference]: With dead ends: 622 [2020-10-13 05:18:40,241 INFO L226 Difference]: Without dead ends: 488 [2020-10-13 05:18:40,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:18:40,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-13 05:18:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 480. [2020-10-13 05:18:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2020-10-13 05:18:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 608 transitions. [2020-10-13 05:18:40,252 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 608 transitions. Word has length 342 [2020-10-13 05:18:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:40,252 INFO L479 AbstractCegarLoop]: Abstraction has 480 states and 608 transitions. [2020-10-13 05:18:40,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 05:18:40,253 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 608 transitions. [2020-10-13 05:18:40,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-13 05:18:40,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:40,256 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:40,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 05:18:40,256 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:40,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:40,257 INFO L82 PathProgramCache]: Analyzing trace with hash 753421997, now seen corresponding path program 42 times [2020-10-13 05:18:40,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:40,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087929576] [2020-10-13 05:18:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:40,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:41,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:45,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:45,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 358 [2020-10-13 05:18:45,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:45,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 05:18:45,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:45,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 05:18:45,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 223 [2020-10-13 05:18:45,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-13 05:18:45,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:46,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:46,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:46,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:46,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:46,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:46,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:46,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:46,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:46,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:46,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:46,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7014 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 4347 trivial. 0 not checked. [2020-10-13 05:18:46,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087929576] [2020-10-13 05:18:46,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:46,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 05:18:46,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629896813] [2020-10-13 05:18:46,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 05:18:46,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:46,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 05:18:46,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:18:46,570 INFO L87 Difference]: Start difference. First operand 480 states and 608 transitions. Second operand 46 states. [2020-10-13 05:18:47,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:47,832 INFO L93 Difference]: Finished difference Result 636 states and 773 transitions. [2020-10-13 05:18:47,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 05:18:47,833 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 350 [2020-10-13 05:18:47,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:47,837 INFO L225 Difference]: With dead ends: 636 [2020-10-13 05:18:47,838 INFO L226 Difference]: Without dead ends: 499 [2020-10-13 05:18:47,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:18:47,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-10-13 05:18:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 491. [2020-10-13 05:18:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-10-13 05:18:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 622 transitions. [2020-10-13 05:18:47,850 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 622 transitions. Word has length 350 [2020-10-13 05:18:47,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:47,851 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 622 transitions. [2020-10-13 05:18:47,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 05:18:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 622 transitions. [2020-10-13 05:18:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-10-13 05:18:47,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:47,854 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:47,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 05:18:47,854 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:47,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:47,854 INFO L82 PathProgramCache]: Analyzing trace with hash 311830103, now seen corresponding path program 43 times [2020-10-13 05:18:47,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:47,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048692198] [2020-10-13 05:18:47,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:47,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:49,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:52,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:52,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 366 [2020-10-13 05:18:52,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:52,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 05:18:52,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:52,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 05:18:52,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 228 [2020-10-13 05:18:52,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-13 05:18:52,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:54,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:54,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:54,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:54,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:54,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:54,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:54,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:54,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7353 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 4558 trivial. 0 not checked. [2020-10-13 05:18:54,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048692198] [2020-10-13 05:18:54,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:54,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 05:18:54,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248349559] [2020-10-13 05:18:54,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 05:18:54,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:54,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 05:18:54,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:18:54,199 INFO L87 Difference]: Start difference. First operand 491 states and 622 transitions. Second operand 47 states. [2020-10-13 05:18:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:55,493 INFO L93 Difference]: Finished difference Result 650 states and 790 transitions. [2020-10-13 05:18:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 05:18:55,494 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 358 [2020-10-13 05:18:55,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:55,497 INFO L225 Difference]: With dead ends: 650 [2020-10-13 05:18:55,497 INFO L226 Difference]: Without dead ends: 510 [2020-10-13 05:18:55,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 05:18:55,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-10-13 05:18:55,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 502. [2020-10-13 05:18:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-10-13 05:18:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 636 transitions. [2020-10-13 05:18:55,508 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 636 transitions. Word has length 358 [2020-10-13 05:18:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:55,509 INFO L479 AbstractCegarLoop]: Abstraction has 502 states and 636 transitions. [2020-10-13 05:18:55,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 05:18:55,509 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 636 transitions. [2020-10-13 05:18:55,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-10-13 05:18:55,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:55,512 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:55,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 05:18:55,513 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1485053293, now seen corresponding path program 44 times [2020-10-13 05:18:55,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:55,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052372886] [2020-10-13 05:18:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:55,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:56,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:00,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:00,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 374 [2020-10-13 05:19:00,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:19:00,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:19:00,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 05:19:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 233 [2020-10-13 05:19:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-13 05:19:00,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:01,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:01,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:01,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:01,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:01,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:01,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:01,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:01,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7700 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 4774 trivial. 0 not checked. [2020-10-13 05:19:01,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052372886] [2020-10-13 05:19:01,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:01,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 05:19:01,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331645877] [2020-10-13 05:19:01,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 05:19:01,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:01,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 05:19:01,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 05:19:01,900 INFO L87 Difference]: Start difference. First operand 502 states and 636 transitions. Second operand 48 states. [2020-10-13 05:19:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:03,057 INFO L93 Difference]: Finished difference Result 664 states and 807 transitions. [2020-10-13 05:19:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 05:19:03,058 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 366 [2020-10-13 05:19:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:03,061 INFO L225 Difference]: With dead ends: 664 [2020-10-13 05:19:03,061 INFO L226 Difference]: Without dead ends: 521 [2020-10-13 05:19:03,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 05:19:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2020-10-13 05:19:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 513. [2020-10-13 05:19:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-13 05:19:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 650 transitions. [2020-10-13 05:19:03,073 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 650 transitions. Word has length 366 [2020-10-13 05:19:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:03,074 INFO L479 AbstractCegarLoop]: Abstraction has 513 states and 650 transitions. [2020-10-13 05:19:03,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 05:19:03,074 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 650 transitions. [2020-10-13 05:19:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-10-13 05:19:03,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:03,077 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:03,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 05:19:03,077 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:03,078 INFO L82 PathProgramCache]: Analyzing trace with hash -475812457, now seen corresponding path program 45 times [2020-10-13 05:19:03,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:03,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98294087] [2020-10-13 05:19:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:03,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:04,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:08,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:08,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-13 05:19:08,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:19:08,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 05:19:08,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 05:19:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 238 [2020-10-13 05:19:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-13 05:19:08,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:09,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:09,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:09,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:09,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:09,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:09,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:09,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:09,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:09,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:09,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:09,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8055 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 4995 trivial. 0 not checked. [2020-10-13 05:19:09,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98294087] [2020-10-13 05:19:09,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:09,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 05:19:09,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224038397] [2020-10-13 05:19:09,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 05:19:09,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:09,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 05:19:09,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 05:19:09,510 INFO L87 Difference]: Start difference. First operand 513 states and 650 transitions. Second operand 49 states. [2020-10-13 05:19:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:10,614 INFO L93 Difference]: Finished difference Result 678 states and 824 transitions. [2020-10-13 05:19:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 05:19:10,616 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 374 [2020-10-13 05:19:10,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:10,618 INFO L225 Difference]: With dead ends: 678 [2020-10-13 05:19:10,618 INFO L226 Difference]: Without dead ends: 532 [2020-10-13 05:19:10,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 05:19:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2020-10-13 05:19:10,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 524. [2020-10-13 05:19:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-10-13 05:19:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 664 transitions. [2020-10-13 05:19:10,628 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 664 transitions. Word has length 374 [2020-10-13 05:19:10,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:10,629 INFO L479 AbstractCegarLoop]: Abstraction has 524 states and 664 transitions. [2020-10-13 05:19:10,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 05:19:10,629 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 664 transitions. [2020-10-13 05:19:10,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-10-13 05:19:10,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:10,632 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:10,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 05:19:10,632 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:10,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:10,632 INFO L82 PathProgramCache]: Analyzing trace with hash -609149907, now seen corresponding path program 46 times [2020-10-13 05:19:10,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:10,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730852476] [2020-10-13 05:19:10,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:10,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:12,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:15,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:15,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 390 [2020-10-13 05:19:15,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:19:15,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:19:15,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:15,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 05:19:15,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 243 [2020-10-13 05:19:15,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-13 05:19:15,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:17,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:17,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:17,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:17,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:17,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:17,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:17,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:17,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:17,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:17,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:17,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8418 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2020-10-13 05:19:17,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730852476] [2020-10-13 05:19:17,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:17,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 05:19:17,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778105371] [2020-10-13 05:19:17,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 05:19:17,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:17,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 05:19:17,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 05:19:17,104 INFO L87 Difference]: Start difference. First operand 524 states and 664 transitions. Second operand 50 states. [2020-10-13 05:19:18,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:18,416 INFO L93 Difference]: Finished difference Result 692 states and 841 transitions. [2020-10-13 05:19:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 05:19:18,417 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 382 [2020-10-13 05:19:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:18,421 INFO L225 Difference]: With dead ends: 692 [2020-10-13 05:19:18,421 INFO L226 Difference]: Without dead ends: 543 [2020-10-13 05:19:18,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 05:19:18,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-10-13 05:19:18,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 535. [2020-10-13 05:19:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-13 05:19:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 678 transitions. [2020-10-13 05:19:18,431 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 678 transitions. Word has length 382 [2020-10-13 05:19:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:18,432 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 678 transitions. [2020-10-13 05:19:18,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 05:19:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 678 transitions. [2020-10-13 05:19:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-10-13 05:19:18,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:18,435 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:18,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 05:19:18,435 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:18,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:18,435 INFO L82 PathProgramCache]: Analyzing trace with hash 368444631, now seen corresponding path program 47 times [2020-10-13 05:19:18,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:18,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490773189] [2020-10-13 05:19:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:18,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:19,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:23,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:23,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 398 [2020-10-13 05:19:23,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:19:23,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 05:19:23,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:23,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 05:19:23,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 248 [2020-10-13 05:19:23,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-13 05:19:23,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:24,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:24,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:24,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:24,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:24,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:24,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:24,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:24,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:24,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:24,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:24,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8789 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 5452 trivial. 0 not checked. [2020-10-13 05:19:24,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490773189] [2020-10-13 05:19:24,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:24,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 05:19:24,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197303141] [2020-10-13 05:19:24,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 05:19:24,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:24,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 05:19:24,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 05:19:24,965 INFO L87 Difference]: Start difference. First operand 535 states and 678 transitions. Second operand 51 states.