/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=BIGGEST --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/loop-acceleration/nested_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:00:39,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:00:39,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:00:39,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:00:39,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:00:39,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:00:39,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:00:39,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:00:39,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:00:39,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:00:39,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:00:39,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:00:39,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:00:39,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:00:39,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:00:39,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:00:39,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:00:39,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:00:39,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:00:39,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:00:39,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:00:39,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:00:39,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:00:39,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:00:39,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:00:39,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:00:39,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:00:39,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:00:39,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:00:39,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:00:39,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:00:39,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:00:39,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:00:39,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:00:39,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:00:39,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:00:39,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:00:39,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:00:39,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:00:39,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:00:39,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:00:39,973 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 [2020-10-12 16:00:40,018 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:00:40,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:00:40,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:00:40,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:00:40,022 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:00:40,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:00:40,022 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:00:40,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:00:40,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:00:40,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:00:40,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:00:40,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:00:40,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:00:40,025 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:00:40,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:00:40,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:00:40,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:00:40,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:00:40,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:00:40,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:00:40,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:00:40,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:00:40,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:00:40,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:00:40,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:00:40,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:00:40,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:00:40,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:00:40,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:00:40,028 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:00:40,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:00:40,320 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:00:40,323 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:00:40,325 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:00:40,325 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:00:40,326 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2020-10-12 16:00:40,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ffa0b96c/c313dd67b50549369426165fb307e419/FLAG4618a702b [2020-10-12 16:00:40,865 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:00:40,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2020-10-12 16:00:40,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ffa0b96c/c313dd67b50549369426165fb307e419/FLAG4618a702b [2020-10-12 16:00:41,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ffa0b96c/c313dd67b50549369426165fb307e419 [2020-10-12 16:00:41,274 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:00:41,276 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:00:41,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:00:41,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:00:41,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:00:41,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:00:41" (1/1) ... [2020-10-12 16:00:41,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e0386e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:00:41, skipping insertion in model container [2020-10-12 16:00:41,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:00:41" (1/1) ... [2020-10-12 16:00:41,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:00:41,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:00:41,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:00:41,509 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:00:41,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:00:41,535 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:00:41,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:00:41 WrapperNode [2020-10-12 16:00:41,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:00:41,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:00:41,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:00:41,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:00:41,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:00:41" (1/1) ... [2020-10-12 16:00:41,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:00:41" (1/1) ... [2020-10-12 16:00:41,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:00:41" (1/1) ... [2020-10-12 16:00:41,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:00:41" (1/1) ... [2020-10-12 16:00:41,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:00:41" (1/1) ... [2020-10-12 16:00:41,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:00:41" (1/1) ... [2020-10-12 16:00:41,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:00:41" (1/1) ... [2020-10-12 16:00:41,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:00:41,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:00:41,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:00:41,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:00:41,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:00:41" (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 [2020-10-12 16:00:41,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:00:41,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:00:41,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:00:41,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:00:41,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:00:41,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:00:41,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:00:41,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:00:41,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:00:41,885 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:00:41,885 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 16:00:41,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:00:41 BoogieIcfgContainer [2020-10-12 16:00:41,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:00:41,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:00:41,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:00:41,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:00:41,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:00:41" (1/3) ... [2020-10-12 16:00:41,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35da1b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:00:41, skipping insertion in model container [2020-10-12 16:00:41,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:00:41" (2/3) ... [2020-10-12 16:00:41,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35da1b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:00:41, skipping insertion in model container [2020-10-12 16:00:41,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:00:41" (3/3) ... [2020-10-12 16:00:41,897 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2020-10-12 16:00:41,908 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:00:41,915 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:00:41,929 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:00:41,950 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:00:41,950 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:00:41,950 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:00:41,950 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:00:41,951 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:00:41,951 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:00:41,951 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:00:41,951 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:00:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-12 16:00:41,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:00:41,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:41,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:41,972 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:41,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:41,977 INFO L82 PathProgramCache]: Analyzing trace with hash -873786703, now seen corresponding path program 1 times [2020-10-12 16:00:41,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:41,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396324536] [2020-10-12 16:00:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:42,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:42,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:42,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:42,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:00:42,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:00:42,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-12 16:00:42,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:42,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:00:42,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:00:42,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:00:42,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:00:42,693 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 15 [2020-10-12 16:00:42,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:42,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:42,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:42,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:00:42,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:42,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:00:42,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:42,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:42,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:42,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:42,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:00:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:00:42,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396324536] [2020-10-12 16:00:42,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:00:42,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:00:42,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261478022] [2020-10-12 16:00:42,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:00:42,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:42,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:00:42,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:00:42,754 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-10-12 16:00:42,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:42,846 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2020-10-12 16:00:42,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:00:42,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-12 16:00:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:42,858 INFO L225 Difference]: With dead ends: 43 [2020-10-12 16:00:42,858 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 16:00:42,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:00:42,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 16:00:42,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-12 16:00:42,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-12 16:00:42,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-12 16:00:42,906 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-12 16:00:42,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:42,906 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-12 16:00:42,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:00:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-12 16:00:42,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:00:42,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:42,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:42,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:00:42,909 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:42,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:42,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1621360120, now seen corresponding path program 1 times [2020-10-12 16:00:42,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:42,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303052402] [2020-10-12 16:00:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:42,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:42,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:43,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:43,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:00:43,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:00:43,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-12 16:00:43,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:43,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:00:43,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:00:43,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:00:43,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:00:43,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:43,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:43,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:43,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:00:43,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:43,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:43,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:43,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:43,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:43,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:43,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:00:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:00:43,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303052402] [2020-10-12 16:00:43,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:43,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:00:43,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030928954] [2020-10-12 16:00:43,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:00:43,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:43,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:00:43,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:00:43,181 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-12 16:00:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:43,204 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-12 16:00:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:00:43,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-12 16:00:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:43,206 INFO L225 Difference]: With dead ends: 24 [2020-10-12 16:00:43,207 INFO L226 Difference]: Without dead ends: 19 [2020-10-12 16:00:43,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:00:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-12 16:00:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-12 16:00:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 16:00:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-12 16:00:43,214 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-12 16:00:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:43,214 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-12 16:00:43,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:00:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-12 16:00:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:00:43,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:43,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:43,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:00:43,216 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1541372241, now seen corresponding path program 2 times [2020-10-12 16:00:43,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:43,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714503053] [2020-10-12 16:00:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:43,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:43,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:43,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:43,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:43,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:43,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:00:43,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:00:43,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-12 16:00:43,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:00:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:00:43,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:00:43,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:43,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:43,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:43,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:43,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:00:43,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:43,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:43,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:43,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:43,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:43,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:43,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:00:43,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714503053] [2020-10-12 16:00:43,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:43,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:00:43,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80307500] [2020-10-12 16:00:43,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:00:43,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:43,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:00:43,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:00:43,832 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2020-10-12 16:00:43,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:43,899 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-10-12 16:00:43,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:00:43,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-12 16:00:43,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:43,900 INFO L225 Difference]: With dead ends: 27 [2020-10-12 16:00:43,901 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 16:00:43,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:00:43,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 16:00:43,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-10-12 16:00:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 16:00:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-12 16:00:43,907 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2020-10-12 16:00:43,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:43,908 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-12 16:00:43,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:00:43,908 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-12 16:00:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:00:43,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:43,909 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:43,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:00:43,909 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:43,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:43,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1965649064, now seen corresponding path program 3 times [2020-10-12 16:00:43,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:43,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248968361] [2020-10-12 16:00:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:43,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:43,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:43,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:43,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:44,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:44,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:00:44,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:00:44,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-10-12 16:00:44,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:44,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:00:44,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:00:44,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:00:44,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:44,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:44,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:44,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:44,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:00:44,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:44,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:44,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:44,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:44,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:44,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:44,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:00:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:00:44,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248968361] [2020-10-12 16:00:44,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:44,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:00:44,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66382922] [2020-10-12 16:00:44,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:00:44,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:44,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:00:44,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:00:44,453 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2020-10-12 16:00:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:44,492 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-10-12 16:00:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:00:44,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-12 16:00:44,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:44,494 INFO L225 Difference]: With dead ends: 30 [2020-10-12 16:00:44,494 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:00:44,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:00:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:00:44,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-12 16:00:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:00:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-12 16:00:44,502 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2020-10-12 16:00:44,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:44,502 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-12 16:00:44,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:00:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-12 16:00:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:00:44,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:44,504 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:44,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:00:44,504 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:44,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:44,505 INFO L82 PathProgramCache]: Analyzing trace with hash -262903823, now seen corresponding path program 4 times [2020-10-12 16:00:44,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:44,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26492088] [2020-10-12 16:00:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:44,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:44,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:44,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:44,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:44,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:45,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:46,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:46,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:00:46,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:00:46,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1546 [2020-10-12 16:00:46,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:46,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:00:46,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:00:46,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:00:46,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:00:46,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:46,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:46,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:46,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:00:46,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:46,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:46,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:46,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:46,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:46,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:46,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:00:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:00:46,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26492088] [2020-10-12 16:00:46,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:46,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:00:46,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185146632] [2020-10-12 16:00:46,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:00:46,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:46,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:00:46,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:00:46,283 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 9 states. [2020-10-12 16:00:46,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:46,436 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-12 16:00:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:00:46,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-12 16:00:46,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:46,439 INFO L225 Difference]: With dead ends: 33 [2020-10-12 16:00:46,439 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 16:00:46,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:00:46,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 16:00:46,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-12 16:00:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:00:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-12 16:00:46,453 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 22 [2020-10-12 16:00:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:46,454 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-12 16:00:46,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:00:46,456 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-12 16:00:46,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:00:46,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:46,457 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:46,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:00:46,458 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:46,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:46,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1638162248, now seen corresponding path program 5 times [2020-10-12 16:00:46,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:46,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257700986] [2020-10-12 16:00:46,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:46,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:46,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:46,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:46,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:46,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:46,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:49,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:49,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:00:49,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:00:49,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2642 [2020-10-12 16:00:49,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:49,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:00:49,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:00:49,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:00:49,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:49,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:49,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:49,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:49,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:00:49,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:49,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:49,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:49,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:00:49,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257700986] [2020-10-12 16:00:49,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:49,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:00:49,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946717416] [2020-10-12 16:00:49,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:00:49,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:00:49,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:00:49,203 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 8 states. [2020-10-12 16:00:49,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:49,268 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-12 16:00:49,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:00:49,268 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-12 16:00:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:49,270 INFO L225 Difference]: With dead ends: 36 [2020-10-12 16:00:49,270 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 16:00:49,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:00:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 16:00:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-12 16:00:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:00:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-12 16:00:49,277 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 25 [2020-10-12 16:00:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:49,277 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-12 16:00:49,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:00:49,278 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-12 16:00:49,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:00:49,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:49,279 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:49,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:00:49,279 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:49,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2026102417, now seen corresponding path program 6 times [2020-10-12 16:00:49,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:49,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360829506] [2020-10-12 16:00:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:49,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:49,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:49,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:49,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:49,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:49,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:49,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:53,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:54,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:54,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:00:54,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:00:54,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 16:00:54,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:54,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:00:54,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:00:54,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:00:54,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:00:54,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:54,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:54,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:54,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:00:54,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:54,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:54,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:54,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:54,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:00:54,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360829506] [2020-10-12 16:00:54,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:54,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:00:54,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127899261] [2020-10-12 16:00:54,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:00:54,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:54,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:00:54,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:00:54,532 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 11 states. [2020-10-12 16:00:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:54,729 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-12 16:00:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:00:54,730 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-12 16:00:54,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:54,731 INFO L225 Difference]: With dead ends: 39 [2020-10-12 16:00:54,731 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 16:00:54,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:00:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 16:00:54,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-12 16:00:54,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 16:00:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-12 16:00:54,748 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 28 [2020-10-12 16:00:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:54,750 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-12 16:00:54,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:00:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-12 16:00:54,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:00:54,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:54,751 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:54,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:00:54,752 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:54,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:54,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1049025000, now seen corresponding path program 7 times [2020-10-12 16:00:54,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:54,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651171673] [2020-10-12 16:00:54,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:54,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:54,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:54,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:54,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:54,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:54,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:54,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:54,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:59,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:59,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:00:59,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:00:59,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 16:00:59,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:59,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:00:59,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:00:59,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:00:59,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:00:59,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:59,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:59,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:59,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:00:59,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:59,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:59,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:59,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:59,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:59,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:59,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:00:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:00:59,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651171673] [2020-10-12 16:00:59,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:59,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:00:59,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791674828] [2020-10-12 16:00:59,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:00:59,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:59,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:00:59,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:00:59,947 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2020-10-12 16:01:00,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:00,092 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-12 16:01:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:01:00,093 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-12 16:01:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:00,094 INFO L225 Difference]: With dead ends: 42 [2020-10-12 16:01:00,094 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 16:01:00,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:01:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 16:01:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-12 16:01:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 16:01:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-10-12 16:01:00,101 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 31 [2020-10-12 16:01:00,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:00,102 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-10-12 16:01:00,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:01:00,102 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-10-12 16:01:00,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:01:00,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:00,104 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:00,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:01:00,104 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:00,105 INFO L82 PathProgramCache]: Analyzing trace with hash -517481167, now seen corresponding path program 8 times [2020-10-12 16:01:00,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:00,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240961780] [2020-10-12 16:01:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:00,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:00,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:00,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:00,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:00,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:00,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:00,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:00,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:05,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:05,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:01:05,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 16:01:05,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 16:01:05,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:05,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:01:05,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:05,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:01:05,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:05,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:05,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:05,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:05,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:05,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:05,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:01:05,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:05,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:05,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240961780] [2020-10-12 16:01:05,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:05,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:01:05,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170900882] [2020-10-12 16:01:05,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:01:05,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:05,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:01:05,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:01:05,255 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 11 states. [2020-10-12 16:01:05,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:05,371 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-10-12 16:01:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:01:05,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-12 16:01:05,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:05,372 INFO L225 Difference]: With dead ends: 45 [2020-10-12 16:01:05,372 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 16:01:05,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:01:05,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 16:01:05,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-12 16:01:05,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 16:01:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-10-12 16:01:05,379 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 34 [2020-10-12 16:01:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:05,379 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-10-12 16:01:05,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:01:05,380 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-10-12 16:01:05,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:01:05,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:05,381 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:05,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:01:05,381 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:05,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:05,382 INFO L82 PathProgramCache]: Analyzing trace with hash -839572616, now seen corresponding path program 9 times [2020-10-12 16:01:05,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:05,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287736008] [2020-10-12 16:01:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:05,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:05,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:05,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:05,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:05,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:05,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:05,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:05,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:05,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:06,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:10,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:10,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:01:10,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 16:01:10,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 16:01:10,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:01:10,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:10,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:01:10,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:10,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:10,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:10,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:10,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:10,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:10,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:10,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:10,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:10,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:10,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:10,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:10,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287736008] [2020-10-12 16:01:10,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:10,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:01:10,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686152318] [2020-10-12 16:01:10,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:01:10,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:10,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:01:10,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:01:10,537 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 12 states. [2020-10-12 16:01:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:10,667 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2020-10-12 16:01:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:01:10,667 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-12 16:01:10,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:10,668 INFO L225 Difference]: With dead ends: 48 [2020-10-12 16:01:10,668 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 16:01:10,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:01:10,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 16:01:10,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-12 16:01:10,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 16:01:10,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-10-12 16:01:10,677 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 37 [2020-10-12 16:01:10,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:10,678 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-10-12 16:01:10,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:01:10,678 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-10-12 16:01:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:01:10,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:10,682 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:10,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:01:10,683 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:10,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1308990511, now seen corresponding path program 10 times [2020-10-12 16:01:10,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:10,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628286784] [2020-10-12 16:01:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:10,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:10,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:10,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:10,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:10,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:10,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:10,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:10,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:10,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:11,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:12,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:15,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:15,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:01:15,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 16:01:15,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 16:01:15,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:01:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:01:15,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:15,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:15,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:15,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:15,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:15,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:15,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:01:15,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:15,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:15,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:15,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:15,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:01:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:15,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628286784] [2020-10-12 16:01:15,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:15,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:01:15,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803970202] [2020-10-12 16:01:15,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:01:15,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:15,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:01:15,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:01:15,875 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 13 states. [2020-10-12 16:01:16,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:16,037 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-10-12 16:01:16,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:01:16,037 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-12 16:01:16,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:16,039 INFO L225 Difference]: With dead ends: 51 [2020-10-12 16:01:16,039 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 16:01:16,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:01:16,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 16:01:16,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-12 16:01:16,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 16:01:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-12 16:01:16,053 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 40 [2020-10-12 16:01:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:16,056 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-12 16:01:16,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:01:16,056 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-10-12 16:01:16,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 16:01:16,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:16,057 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:16,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:01:16,057 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:16,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1323984680, now seen corresponding path program 11 times [2020-10-12 16:01:16,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:16,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687475696] [2020-10-12 16:01:16,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:16,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:16,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:16,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:16,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:16,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:16,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:16,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:16,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:16,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:16,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:18,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:18,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:21,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:21,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 16:01:21,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 16:01:21,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:01:21,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:21,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:01:21,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:01:21,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:01:21,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:21,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:21,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:21,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:21,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:21,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:21,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:01:21,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:21,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:21,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:21,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:21,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:01:21,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687475696] [2020-10-12 16:01:21,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:21,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:01:21,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078738175] [2020-10-12 16:01:21,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:01:21,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:21,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:01:21,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:01:21,297 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 14 states. [2020-10-12 16:01:21,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:21,495 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-10-12 16:01:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:01:21,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-12 16:01:21,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:21,498 INFO L225 Difference]: With dead ends: 54 [2020-10-12 16:01:21,498 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 16:01:21,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:01:21,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 16:01:21,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-12 16:01:21,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 16:01:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-10-12 16:01:21,505 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 43 [2020-10-12 16:01:21,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:21,505 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-10-12 16:01:21,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:01:21,505 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-10-12 16:01:21,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 16:01:21,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:21,506 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:21,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:01:21,507 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:21,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:21,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1338674575, now seen corresponding path program 12 times [2020-10-12 16:01:21,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:21,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379900192] [2020-10-12 16:01:21,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:21,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:21,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:21,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:21,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:21,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:21,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:21,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:21,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:21,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:21,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:22,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:26,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:26,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 16:01:26,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 16:01:26,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 16:01:26,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:26,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:01:26,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 16:01:26,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:01:26,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:26,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:26,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:26,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:26,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:26,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:26,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:01:26,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:26,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:26,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:26,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:26,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-12 16:01:26,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379900192] [2020-10-12 16:01:26,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:01:26,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 16:01:26,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193743219] [2020-10-12 16:01:26,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 16:01:26,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:26,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 16:01:26,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:01:26,543 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 3 states. [2020-10-12 16:01:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:26,562 INFO L93 Difference]: Finished difference Result 99 states and 134 transitions. [2020-10-12 16:01:26,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 16:01:26,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-10-12 16:01:26,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:26,564 INFO L225 Difference]: With dead ends: 99 [2020-10-12 16:01:26,564 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 16:01:26,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:01:26,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 16:01:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-12 16:01:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 16:01:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-10-12 16:01:26,579 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 46 [2020-10-12 16:01:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:26,579 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-10-12 16:01:26,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 16:01:26,579 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-10-12 16:01:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 16:01:26,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:26,580 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:26,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:01:26,580 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:26,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:26,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1293605117, now seen corresponding path program 1 times [2020-10-12 16:01:26,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:26,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948295183] [2020-10-12 16:01:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:26,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:26,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:26,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:26,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:26,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:26,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:26,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:26,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:27,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:30,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:31,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:31,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 16:01:31,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 16:01:31,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 16:01:31,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:31,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:01:31,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 16:01:31,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 16:01:31,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:31,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:31,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:31,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:31,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:31,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:31,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:31,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:31,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:31,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 241 proven. 1 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-10-12 16:01:31,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948295183] [2020-10-12 16:01:31,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:31,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:01:31,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907935327] [2020-10-12 16:01:31,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:01:31,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:31,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:01:31,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:01:31,633 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 4 states. [2020-10-12 16:01:31,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:31,655 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2020-10-12 16:01:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:01:31,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-12 16:01:31,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:31,657 INFO L225 Difference]: With dead ends: 122 [2020-10-12 16:01:31,657 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 16:01:31,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:01:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 16:01:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-12 16:01:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 16:01:31,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-10-12 16:01:31,676 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 58 [2020-10-12 16:01:31,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:31,676 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-10-12 16:01:31,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:01:31,676 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-10-12 16:01:31,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 16:01:31,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:31,682 INFO L422 BasicCegarLoop]: trace histogram [24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:31,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:01:31,682 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:31,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:31,682 INFO L82 PathProgramCache]: Analyzing trace with hash 593556721, now seen corresponding path program 2 times [2020-10-12 16:01:31,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:31,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259709332] [2020-10-12 16:01:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:31,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:31,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:31,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:31,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:31,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:31,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:31,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:32,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:36,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:36,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 16:01:36,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:01:36,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 16:01:36,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:36,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:01:36,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-12 16:01:36,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:01:36,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:36,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:36,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:36,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:36,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:36,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:36,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:01:36,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:36,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:36,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:36,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:36,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 426 proven. 3 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-12 16:01:36,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259709332] [2020-10-12 16:01:36,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:36,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:01:36,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493612110] [2020-10-12 16:01:36,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:01:36,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:36,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:01:36,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:01:36,768 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 5 states. [2020-10-12 16:01:36,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:36,789 INFO L93 Difference]: Finished difference Result 145 states and 180 transitions. [2020-10-12 16:01:36,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:01:36,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-12 16:01:36,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:36,791 INFO L225 Difference]: With dead ends: 145 [2020-10-12 16:01:36,791 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 16:01:36,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:01:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 16:01:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-12 16:01:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 16:01:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-10-12 16:01:36,803 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 70 [2020-10-12 16:01:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:36,803 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-10-12 16:01:36,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:01:36,803 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-10-12 16:01:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 16:01:36,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:36,804 INFO L422 BasicCegarLoop]: trace histogram [36, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:36,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:01:36,805 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:36,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:36,805 INFO L82 PathProgramCache]: Analyzing trace with hash 150739325, now seen corresponding path program 3 times [2020-10-12 16:01:36,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:36,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835096363] [2020-10-12 16:01:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:36,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:36,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:36,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:36,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:36,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:36,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:36,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:37,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:41,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:41,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 16:01:41,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:01:41,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 16:01:41,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:41,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:01:41,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 16:01:41,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:01:41,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:41,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:41,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:41,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:41,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:41,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:41,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:01:41,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:41,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:41,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:41,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:41,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 696 proven. 6 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-12 16:01:41,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835096363] [2020-10-12 16:01:41,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:41,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:01:41,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624465891] [2020-10-12 16:01:41,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:01:41,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:41,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:01:41,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:01:41,902 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 6 states. [2020-10-12 16:01:41,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:41,944 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2020-10-12 16:01:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:01:41,945 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-12 16:01:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:41,946 INFO L225 Difference]: With dead ends: 168 [2020-10-12 16:01:41,946 INFO L226 Difference]: Without dead ends: 95 [2020-10-12 16:01:41,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:01:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-12 16:01:41,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-12 16:01:41,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 16:01:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-10-12 16:01:41,979 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 82 [2020-10-12 16:01:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:41,980 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-10-12 16:01:41,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:01:41,980 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-10-12 16:01:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 16:01:41,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:41,986 INFO L422 BasicCegarLoop]: trace histogram [48, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:41,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:01:41,986 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:41,987 INFO L82 PathProgramCache]: Analyzing trace with hash -865380495, now seen corresponding path program 4 times [2020-10-12 16:01:41,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:41,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500265394] [2020-10-12 16:01:41,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:42,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:42,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:42,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:42,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:42,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:42,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:42,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:43,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:47,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:47,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 16:01:47,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:01:47,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 16:01:47,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:47,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:01:47,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 16:01:47,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:01:47,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:47,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:47,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:47,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:47,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:47,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:47,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:01:47,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:47,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:47,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:47,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:47,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 775 proven. 10 refuted. 0 times theorem prover too weak. 1129 trivial. 0 not checked. [2020-10-12 16:01:47,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500265394] [2020-10-12 16:01:47,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:47,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:01:47,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423993026] [2020-10-12 16:01:47,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:01:47,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:47,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:01:47,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:01:47,090 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 7 states. [2020-10-12 16:01:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:47,131 INFO L93 Difference]: Finished difference Result 191 states and 226 transitions. [2020-10-12 16:01:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:01:47,131 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-12 16:01:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:47,132 INFO L225 Difference]: With dead ends: 191 [2020-10-12 16:01:47,132 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 16:01:47,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:01:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 16:01:47,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-12 16:01:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 16:01:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-10-12 16:01:47,144 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 94 [2020-10-12 16:01:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:47,145 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-10-12 16:01:47,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:01:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-10-12 16:01:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-12 16:01:47,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:47,146 INFO L422 BasicCegarLoop]: trace histogram [60, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:47,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:01:47,146 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:47,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:47,147 INFO L82 PathProgramCache]: Analyzing trace with hash 700709373, now seen corresponding path program 5 times [2020-10-12 16:01:47,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:47,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703212757] [2020-10-12 16:01:47,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:47,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:47,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:47,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:47,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:47,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:47,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:47,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:52,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:52,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:52,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 16:01:52,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:01:52,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 16:01:52,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:52,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:01:52,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 16:01:52,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:01:52,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:52,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:52,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:52,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:52,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:52,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:52,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:52,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:52,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:52,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:52,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:52,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 1479 proven. 15 refuted. 0 times theorem prover too weak. 1206 trivial. 0 not checked. [2020-10-12 16:01:52,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703212757] [2020-10-12 16:01:52,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:52,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:01:52,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137229690] [2020-10-12 16:01:52,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:01:52,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:01:52,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:01:52,289 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 8 states. [2020-10-12 16:01:52,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:52,362 INFO L93 Difference]: Finished difference Result 214 states and 249 transitions. [2020-10-12 16:01:52,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:01:52,363 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-10-12 16:01:52,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:52,365 INFO L225 Difference]: With dead ends: 214 [2020-10-12 16:01:52,365 INFO L226 Difference]: Without dead ends: 119 [2020-10-12 16:01:52,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:01:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-12 16:01:52,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-12 16:01:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-12 16:01:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2020-10-12 16:01:52,386 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 106 [2020-10-12 16:01:52,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:52,386 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2020-10-12 16:01:52,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:01:52,387 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2020-10-12 16:01:52,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 16:01:52,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:52,389 INFO L422 BasicCegarLoop]: trace histogram [72, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:52,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:01:52,389 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:52,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:52,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1881446897, now seen corresponding path program 6 times [2020-10-12 16:01:52,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:52,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976728134] [2020-10-12 16:01:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:52,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:52,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:52,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:52,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:52,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:52,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:53,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:57,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:57,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-12 16:01:57,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 16:01:57,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 16:01:57,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:57,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:01:57,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-12 16:01:57,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:01:57,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:57,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:57,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:57,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:57,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:01:57,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:57,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:57,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:57,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:57,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:57,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:57,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3630 backedges. 1983 proven. 21 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2020-10-12 16:01:57,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976728134] [2020-10-12 16:01:57,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:57,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:01:57,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322272403] [2020-10-12 16:01:57,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:01:57,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:57,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:01:57,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:01:57,548 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand 9 states. [2020-10-12 16:01:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:57,635 INFO L93 Difference]: Finished difference Result 237 states and 272 transitions. [2020-10-12 16:01:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:01:57,636 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 118 [2020-10-12 16:01:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:57,639 INFO L225 Difference]: With dead ends: 237 [2020-10-12 16:01:57,639 INFO L226 Difference]: Without dead ends: 131 [2020-10-12 16:01:57,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:01:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-12 16:01:57,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-12 16:01:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 16:01:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2020-10-12 16:01:57,654 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 118 [2020-10-12 16:01:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:57,654 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2020-10-12 16:01:57,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:01:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2020-10-12 16:01:57,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-12 16:01:57,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:57,659 INFO L422 BasicCegarLoop]: trace histogram [84, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:57,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:01:57,659 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:57,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:57,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2137160317, now seen corresponding path program 7 times [2020-10-12 16:01:57,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:57,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847581211] [2020-10-12 16:01:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:57,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:57,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:57,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:57,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:57,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:58,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:58,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:02,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:02,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-12 16:02:02,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 16:02:02,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 16:02:02,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:02,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:02:02,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 16:02:02,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:02:02,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:02,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:02,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:02,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:02,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:02,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:02,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:02,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:02,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:02,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:02,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:02,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 1906 proven. 28 refuted. 0 times theorem prover too weak. 2770 trivial. 0 not checked. [2020-10-12 16:02:02,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847581211] [2020-10-12 16:02:02,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:02,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:02:02,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520667028] [2020-10-12 16:02:02,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:02:02,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:02,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:02:02,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:02:02,825 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand 10 states. [2020-10-12 16:02:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:02,903 INFO L93 Difference]: Finished difference Result 260 states and 295 transitions. [2020-10-12 16:02:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:02:02,904 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 130 [2020-10-12 16:02:02,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:02,905 INFO L225 Difference]: With dead ends: 260 [2020-10-12 16:02:02,906 INFO L226 Difference]: Without dead ends: 143 [2020-10-12 16:02:02,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:02:02,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-12 16:02:02,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-12 16:02:02,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 16:02:02,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 155 transitions. [2020-10-12 16:02:02,922 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 155 transitions. Word has length 130 [2020-10-12 16:02:02,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:02,922 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 155 transitions. [2020-10-12 16:02:02,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:02:02,922 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 155 transitions. [2020-10-12 16:02:02,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-12 16:02:02,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:02,924 INFO L422 BasicCegarLoop]: trace histogram [96, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:02,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:02:02,925 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:02,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:02,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1834794097, now seen corresponding path program 8 times [2020-10-12 16:02:02,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:02,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573425688] [2020-10-12 16:02:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:02,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:02,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:03,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:03,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:03,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:03,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:03,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:07,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:07,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-12 16:02:07,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 16:02:07,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 16:02:07,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:07,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:02:07,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-12 16:02:07,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:02:07,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:08,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:08,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:08,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:08,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:08,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:08,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:08,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:08,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:08,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:08,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:08,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 3398 proven. 36 refuted. 0 times theorem prover too weak. 2488 trivial. 0 not checked. [2020-10-12 16:02:08,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573425688] [2020-10-12 16:02:08,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:08,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:02:08,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007935780] [2020-10-12 16:02:08,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:02:08,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:08,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:02:08,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:02:08,097 INFO L87 Difference]: Start difference. First operand 143 states and 155 transitions. Second operand 11 states. [2020-10-12 16:02:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:08,187 INFO L93 Difference]: Finished difference Result 283 states and 318 transitions. [2020-10-12 16:02:08,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:02:08,188 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 142 [2020-10-12 16:02:08,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:08,190 INFO L225 Difference]: With dead ends: 283 [2020-10-12 16:02:08,190 INFO L226 Difference]: Without dead ends: 155 [2020-10-12 16:02:08,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:02:08,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-12 16:02:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-10-12 16:02:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-12 16:02:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 167 transitions. [2020-10-12 16:02:08,203 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 167 transitions. Word has length 142 [2020-10-12 16:02:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:08,204 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 167 transitions. [2020-10-12 16:02:08,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:02:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 167 transitions. [2020-10-12 16:02:08,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-12 16:02:08,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:08,206 INFO L422 BasicCegarLoop]: trace histogram [108, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:08,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:02:08,206 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:08,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:08,206 INFO L82 PathProgramCache]: Analyzing trace with hash 533175037, now seen corresponding path program 9 times [2020-10-12 16:02:08,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:08,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963854863] [2020-10-12 16:02:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:08,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:08,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:08,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:08,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:08,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:08,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:08,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:13,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:13,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-12 16:02:13,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 16:02:13,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 16:02:13,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:13,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:02:13,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:02:13,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:02:13,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:13,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:13,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:13,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:13,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:13,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:13,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:13,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:13,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:13,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:13,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:13,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7284 backedges. 1112 proven. 45 refuted. 0 times theorem prover too weak. 6127 trivial. 0 not checked. [2020-10-12 16:02:13,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963854863] [2020-10-12 16:02:13,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:13,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:02:13,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129870379] [2020-10-12 16:02:13,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:02:13,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:13,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:02:13,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:02:13,384 INFO L87 Difference]: Start difference. First operand 155 states and 167 transitions. Second operand 12 states. [2020-10-12 16:02:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:13,496 INFO L93 Difference]: Finished difference Result 306 states and 341 transitions. [2020-10-12 16:02:13,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:02:13,496 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 154 [2020-10-12 16:02:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:13,498 INFO L225 Difference]: With dead ends: 306 [2020-10-12 16:02:13,498 INFO L226 Difference]: Without dead ends: 167 [2020-10-12 16:02:13,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:02:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-12 16:02:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-10-12 16:02:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-12 16:02:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 179 transitions. [2020-10-12 16:02:13,521 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 179 transitions. Word has length 154 [2020-10-12 16:02:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:13,521 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 179 transitions. [2020-10-12 16:02:13,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:02:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 179 transitions. [2020-10-12 16:02:13,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-12 16:02:13,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:13,523 INFO L422 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:13,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:02:13,524 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:13,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1125925135, now seen corresponding path program 10 times [2020-10-12 16:02:13,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:13,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274133048] [2020-10-12 16:02:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:13,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:14,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:15,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:15,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-12 16:02:15,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:15,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2177 [2020-10-12 16:02:15,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:15,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:02:15,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:15,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-12 16:02:15,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:02:16,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:16,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:16,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:16,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:16,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:16,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:16,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:16,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:16,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:16,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:16,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:02:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-12 16:02:16,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274133048] [2020-10-12 16:02:16,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:16,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:02:16,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116457378] [2020-10-12 16:02:16,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:02:16,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:16,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:02:16,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:02:16,447 INFO L87 Difference]: Start difference. First operand 167 states and 179 transitions. Second operand 17 states. [2020-10-12 16:02:16,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:16,859 INFO L93 Difference]: Finished difference Result 197 states and 211 transitions. [2020-10-12 16:02:16,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:02:16,859 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 166 [2020-10-12 16:02:16,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:16,861 INFO L225 Difference]: With dead ends: 197 [2020-10-12 16:02:16,861 INFO L226 Difference]: Without dead ends: 192 [2020-10-12 16:02:16,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:02:16,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-12 16:02:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 180. [2020-10-12 16:02:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-12 16:02:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 193 transitions. [2020-10-12 16:02:16,880 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 193 transitions. Word has length 166 [2020-10-12 16:02:16,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:16,885 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 193 transitions. [2020-10-12 16:02:16,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:02:16,885 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 193 transitions. [2020-10-12 16:02:16,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-12 16:02:16,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:16,887 INFO L422 BasicCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:16,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:02:16,888 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:16,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:16,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1024998408, now seen corresponding path program 11 times [2020-10-12 16:02:16,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:16,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128497207] [2020-10-12 16:02:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:17,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:19,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:19,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-12 16:02:19,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:19,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2116 [2020-10-12 16:02:19,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:19,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:02:19,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:19,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-12 16:02:19,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:02:19,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:19,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:19,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:19,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:19,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:19,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:19,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:19,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:19,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:19,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:19,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-12 16:02:19,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128497207] [2020-10-12 16:02:19,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:19,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:02:19,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219306991] [2020-10-12 16:02:19,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:02:19,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:19,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:02:19,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:02:19,424 INFO L87 Difference]: Start difference. First operand 180 states and 193 transitions. Second operand 16 states. [2020-10-12 16:02:19,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:19,723 INFO L93 Difference]: Finished difference Result 210 states and 225 transitions. [2020-10-12 16:02:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:02:19,723 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 179 [2020-10-12 16:02:19,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:19,725 INFO L225 Difference]: With dead ends: 210 [2020-10-12 16:02:19,725 INFO L226 Difference]: Without dead ends: 205 [2020-10-12 16:02:19,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:02:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-12 16:02:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2020-10-12 16:02:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-12 16:02:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 207 transitions. [2020-10-12 16:02:19,743 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 207 transitions. Word has length 179 [2020-10-12 16:02:19,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:19,743 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 207 transitions. [2020-10-12 16:02:19,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:02:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 207 transitions. [2020-10-12 16:02:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-12 16:02:19,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:19,746 INFO L422 BasicCegarLoop]: trace histogram [140, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:19,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:02:19,748 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:19,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:19,748 INFO L82 PathProgramCache]: Analyzing trace with hash 627335761, now seen corresponding path program 12 times [2020-10-12 16:02:19,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:19,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503712429] [2020-10-12 16:02:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:19,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:20,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:23,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:23,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-12 16:02:23,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:23,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3480 [2020-10-12 16:02:23,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:23,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:02:23,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:23,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-12 16:02:23,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:23,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:23,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:23,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:23,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:23,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:23,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:02:23,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:23,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:23,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:23,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:23,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:02:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-10-12 16:02:23,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503712429] [2020-10-12 16:02:23,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:23,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:02:23,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296369824] [2020-10-12 16:02:23,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:02:23,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:23,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:02:23,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:02:23,985 INFO L87 Difference]: Start difference. First operand 193 states and 207 transitions. Second operand 19 states. [2020-10-12 16:02:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:24,365 INFO L93 Difference]: Finished difference Result 223 states and 239 transitions. [2020-10-12 16:02:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:02:24,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 192 [2020-10-12 16:02:24,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:24,368 INFO L225 Difference]: With dead ends: 223 [2020-10-12 16:02:24,368 INFO L226 Difference]: Without dead ends: 218 [2020-10-12 16:02:24,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:02:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-12 16:02:24,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 206. [2020-10-12 16:02:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-12 16:02:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 221 transitions. [2020-10-12 16:02:24,386 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 221 transitions. Word has length 192 [2020-10-12 16:02:24,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:24,387 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 221 transitions. [2020-10-12 16:02:24,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:02:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 221 transitions. [2020-10-12 16:02:24,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-12 16:02:24,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:24,389 INFO L422 BasicCegarLoop]: trace histogram [150, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:24,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:02:24,390 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:24,390 INFO L82 PathProgramCache]: Analyzing trace with hash 351509656, now seen corresponding path program 13 times [2020-10-12 16:02:24,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:24,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816716193] [2020-10-12 16:02:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:24,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:26,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:26,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-12 16:02:26,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:26,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1767 [2020-10-12 16:02:26,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:26,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:02:26,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:26,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-12 16:02:26,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:26,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:26,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:26,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:26,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:26,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:26,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:26,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:26,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:26,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:26,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:26,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:02:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13755 backedges. 0 proven. 12930 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2020-10-12 16:02:26,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816716193] [2020-10-12 16:02:26,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:26,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:02:26,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451789543] [2020-10-12 16:02:26,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:02:26,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:26,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:02:26,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:02:26,769 INFO L87 Difference]: Start difference. First operand 206 states and 221 transitions. Second operand 18 states. [2020-10-12 16:02:27,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:27,147 INFO L93 Difference]: Finished difference Result 236 states and 253 transitions. [2020-10-12 16:02:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:02:27,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 205 [2020-10-12 16:02:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:27,149 INFO L225 Difference]: With dead ends: 236 [2020-10-12 16:02:27,149 INFO L226 Difference]: Without dead ends: 231 [2020-10-12 16:02:27,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:02:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-12 16:02:27,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 219. [2020-10-12 16:02:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-12 16:02:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 235 transitions. [2020-10-12 16:02:27,175 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 235 transitions. Word has length 205 [2020-10-12 16:02:27,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:27,175 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 235 transitions. [2020-10-12 16:02:27,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:02:27,175 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 235 transitions. [2020-10-12 16:02:27,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-12 16:02:27,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:27,178 INFO L422 BasicCegarLoop]: trace histogram [160, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:27,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:02:27,178 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:27,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:27,180 INFO L82 PathProgramCache]: Analyzing trace with hash 167087537, now seen corresponding path program 14 times [2020-10-12 16:02:27,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:27,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806427577] [2020-10-12 16:02:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:27,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:28,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:31,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:31,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-12 16:02:31,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:31,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4083 [2020-10-12 16:02:31,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:31,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:02:31,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:31,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 215 [2020-10-12 16:02:31,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:31,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:31,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:31,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:31,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:31,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:31,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:31,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:31,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:31,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:31,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:31,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2020-10-12 16:02:32,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806427577] [2020-10-12 16:02:32,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:32,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:02:32,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327525291] [2020-10-12 16:02:32,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:02:32,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:32,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:02:32,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:02:32,023 INFO L87 Difference]: Start difference. First operand 219 states and 235 transitions. Second operand 21 states. [2020-10-12 16:02:32,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:32,403 INFO L93 Difference]: Finished difference Result 249 states and 267 transitions. [2020-10-12 16:02:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:02:32,404 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 218 [2020-10-12 16:02:32,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:32,405 INFO L225 Difference]: With dead ends: 249 [2020-10-12 16:02:32,406 INFO L226 Difference]: Without dead ends: 244 [2020-10-12 16:02:32,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:02:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-12 16:02:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 232. [2020-10-12 16:02:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-12 16:02:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 249 transitions. [2020-10-12 16:02:32,436 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 249 transitions. Word has length 218 [2020-10-12 16:02:32,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:32,436 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 249 transitions. [2020-10-12 16:02:32,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:02:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 249 transitions. [2020-10-12 16:02:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-12 16:02:32,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:32,440 INFO L422 BasicCegarLoop]: trace histogram [170, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:32,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:02:32,440 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:32,440 INFO L82 PathProgramCache]: Analyzing trace with hash -670307016, now seen corresponding path program 15 times [2020-10-12 16:02:32,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:32,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680798289] [2020-10-12 16:02:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:32,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:35,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:35,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-12 16:02:35,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:35,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2652 [2020-10-12 16:02:35,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:35,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:02:35,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:35,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-10-12 16:02:35,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:35,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:35,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:35,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:35,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:35,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:35,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:35,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:35,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:35,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:35,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:35,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17680 backedges. 0 proven. 16745 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2020-10-12 16:02:35,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680798289] [2020-10-12 16:02:35,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:35,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:02:35,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894488680] [2020-10-12 16:02:35,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:02:35,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:35,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:02:35,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:02:35,688 INFO L87 Difference]: Start difference. First operand 232 states and 249 transitions. Second operand 20 states. [2020-10-12 16:02:36,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:36,055 INFO L93 Difference]: Finished difference Result 262 states and 281 transitions. [2020-10-12 16:02:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:02:36,056 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 231 [2020-10-12 16:02:36,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:36,058 INFO L225 Difference]: With dead ends: 262 [2020-10-12 16:02:36,058 INFO L226 Difference]: Without dead ends: 257 [2020-10-12 16:02:36,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:02:36,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-12 16:02:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 245. [2020-10-12 16:02:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-12 16:02:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 263 transitions. [2020-10-12 16:02:36,084 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 263 transitions. Word has length 231 [2020-10-12 16:02:36,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:36,084 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 263 transitions. [2020-10-12 16:02:36,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:02:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 263 transitions. [2020-10-12 16:02:36,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-12 16:02:36,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:36,087 INFO L422 BasicCegarLoop]: trace histogram [180, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:36,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:02:36,088 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:36,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:36,088 INFO L82 PathProgramCache]: Analyzing trace with hash -2021834479, now seen corresponding path program 16 times [2020-10-12 16:02:36,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:36,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516258353] [2020-10-12 16:02:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:36,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:38,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:41,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:41,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-12 16:02:41,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:41,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-12 16:02:41,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:41,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:02:41,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:41,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-12 16:02:41,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:45,293 WARN L193 SmtUtils]: Spent 3.67 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2020-10-12 16:02:45,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:45,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:45,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:45,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:45,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:45,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:45,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:45,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:45,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:45,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:45,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:02:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-10-12 16:02:45,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516258353] [2020-10-12 16:02:45,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:45,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:02:45,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221394219] [2020-10-12 16:02:45,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:02:45,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:45,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:02:45,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:02:45,568 INFO L87 Difference]: Start difference. First operand 245 states and 263 transitions. Second operand 23 states. [2020-10-12 16:02:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:46,311 INFO L93 Difference]: Finished difference Result 275 states and 295 transitions. [2020-10-12 16:02:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:02:46,312 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 244 [2020-10-12 16:02:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:46,314 INFO L225 Difference]: With dead ends: 275 [2020-10-12 16:02:46,314 INFO L226 Difference]: Without dead ends: 270 [2020-10-12 16:02:46,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:02:46,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-12 16:02:46,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 258. [2020-10-12 16:02:46,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-12 16:02:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 277 transitions. [2020-10-12 16:02:46,341 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 277 transitions. Word has length 244 [2020-10-12 16:02:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:46,342 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 277 transitions. [2020-10-12 16:02:46,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:02:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 277 transitions. [2020-10-12 16:02:46,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-12 16:02:46,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:46,345 INFO L422 BasicCegarLoop]: trace histogram [190, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:46,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:02:46,346 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:46,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:46,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1794460200, now seen corresponding path program 17 times [2020-10-12 16:02:46,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:46,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715312566] [2020-10-12 16:02:46,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:46,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:49,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:49,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-12 16:02:49,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:49,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3146 [2020-10-12 16:02:49,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:49,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:02:49,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:49,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 249 [2020-10-12 16:02:49,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:50,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:50,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:50,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:50,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:50,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:50,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:50,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:50,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:50,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:50,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:50,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 22097 backedges. 0 proven. 21052 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2020-10-12 16:02:50,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715312566] [2020-10-12 16:02:50,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:50,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:02:50,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674788474] [2020-10-12 16:02:50,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:02:50,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:50,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:02:50,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:02:50,188 INFO L87 Difference]: Start difference. First operand 258 states and 277 transitions. Second operand 22 states. [2020-10-12 16:02:50,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:50,753 INFO L93 Difference]: Finished difference Result 288 states and 309 transitions. [2020-10-12 16:02:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:02:50,753 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 257 [2020-10-12 16:02:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:50,755 INFO L225 Difference]: With dead ends: 288 [2020-10-12 16:02:50,755 INFO L226 Difference]: Without dead ends: 283 [2020-10-12 16:02:50,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:02:50,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-12 16:02:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 271. [2020-10-12 16:02:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-12 16:02:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 291 transitions. [2020-10-12 16:02:50,778 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 291 transitions. Word has length 257 [2020-10-12 16:02:50,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:50,778 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 291 transitions. [2020-10-12 16:02:50,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:02:50,778 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 291 transitions. [2020-10-12 16:02:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-12 16:02:50,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:50,781 INFO L422 BasicCegarLoop]: trace histogram [200, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:50,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:02:50,782 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:50,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:50,782 INFO L82 PathProgramCache]: Analyzing trace with hash -949912463, now seen corresponding path program 18 times [2020-10-12 16:02:50,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:50,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749547112] [2020-10-12 16:02:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:50,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:53,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:56,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:56,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-12 16:02:56,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:56,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5141 [2020-10-12 16:02:56,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:56,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:02:56,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:02:56,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 267 [2020-10-12 16:02:56,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:56,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:56,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:56,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:56,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:02:56,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:56,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:02:56,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:56,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:56,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:56,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:56,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2020-10-12 16:02:56,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749547112] [2020-10-12 16:02:56,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:56,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:02:56,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937334104] [2020-10-12 16:02:56,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:02:56,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:56,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:02:56,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:02:56,909 INFO L87 Difference]: Start difference. First operand 271 states and 291 transitions. Second operand 25 states. [2020-10-12 16:02:57,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:57,671 INFO L93 Difference]: Finished difference Result 301 states and 323 transitions. [2020-10-12 16:02:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:02:57,671 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 270 [2020-10-12 16:02:57,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:57,673 INFO L225 Difference]: With dead ends: 301 [2020-10-12 16:02:57,673 INFO L226 Difference]: Without dead ends: 296 [2020-10-12 16:02:57,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:02:57,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-12 16:02:57,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2020-10-12 16:02:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-12 16:02:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 305 transitions. [2020-10-12 16:02:57,699 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 305 transitions. Word has length 270 [2020-10-12 16:02:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:57,700 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 305 transitions. [2020-10-12 16:02:57,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:02:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 305 transitions. [2020-10-12 16:02:57,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-12 16:02:57,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:57,702 INFO L422 BasicCegarLoop]: trace histogram [210, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:57,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:02:57,702 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:57,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:57,703 INFO L82 PathProgramCache]: Analyzing trace with hash 407500408, now seen corresponding path program 19 times [2020-10-12 16:02:57,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:57,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817073807] [2020-10-12 16:02:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:57,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:02,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:02,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-12 16:03:02,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:02,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4166 [2020-10-12 16:03:02,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:02,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:03:02,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:02,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 275 [2020-10-12 16:03:02,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:02,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:02,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:02,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:02,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:02,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:02,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:03:02,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:02,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:02,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:02,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:02,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 27006 backedges. 0 proven. 25851 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-12 16:03:02,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817073807] [2020-10-12 16:03:02,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:02,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:03:02,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026417418] [2020-10-12 16:03:02,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:03:02,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:02,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:03:02,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:03:02,693 INFO L87 Difference]: Start difference. First operand 284 states and 305 transitions. Second operand 24 states. [2020-10-12 16:03:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:03,390 INFO L93 Difference]: Finished difference Result 314 states and 337 transitions. [2020-10-12 16:03:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:03:03,390 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 283 [2020-10-12 16:03:03,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:03,392 INFO L225 Difference]: With dead ends: 314 [2020-10-12 16:03:03,392 INFO L226 Difference]: Without dead ends: 309 [2020-10-12 16:03:03,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:03:03,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-12 16:03:03,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 297. [2020-10-12 16:03:03,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-12 16:03:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 319 transitions. [2020-10-12 16:03:03,421 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 319 transitions. Word has length 283 [2020-10-12 16:03:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:03,422 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 319 transitions. [2020-10-12 16:03:03,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:03:03,422 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 319 transitions. [2020-10-12 16:03:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-10-12 16:03:03,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:03,424 INFO L422 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:03,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:03:03,424 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:03,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:03,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1602764753, now seen corresponding path program 20 times [2020-10-12 16:03:03,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:03,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075407401] [2020-10-12 16:03:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:03,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:06,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:08,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:08,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 304 [2020-10-12 16:03:08,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:03:08,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-12 16:03:08,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:08,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:03:08,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:08,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 293 [2020-10-12 16:03:08,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:09,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:09,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:09,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:09,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:09,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:09,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:03:09,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:09,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:09,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:09,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:09,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2020-10-12 16:03:09,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075407401] [2020-10-12 16:03:09,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:09,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:03:09,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124398134] [2020-10-12 16:03:09,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:03:09,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:09,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:03:09,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:03:09,419 INFO L87 Difference]: Start difference. First operand 297 states and 319 transitions. Second operand 27 states. [2020-10-12 16:03:10,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:10,334 INFO L93 Difference]: Finished difference Result 327 states and 351 transitions. [2020-10-12 16:03:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:03:10,340 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 296 [2020-10-12 16:03:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:10,343 INFO L225 Difference]: With dead ends: 327 [2020-10-12 16:03:10,343 INFO L226 Difference]: Without dead ends: 322 [2020-10-12 16:03:10,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:03:10,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-12 16:03:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 310. [2020-10-12 16:03:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-12 16:03:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 333 transitions. [2020-10-12 16:03:10,381 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 333 transitions. Word has length 296 [2020-10-12 16:03:10,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:10,382 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 333 transitions. [2020-10-12 16:03:10,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:03:10,382 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 333 transitions. [2020-10-12 16:03:10,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-12 16:03:10,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:10,385 INFO L422 BasicCegarLoop]: trace histogram [230, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:10,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:03:10,386 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:10,386 INFO L82 PathProgramCache]: Analyzing trace with hash 295939864, now seen corresponding path program 21 times [2020-10-12 16:03:10,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:10,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774355380] [2020-10-12 16:03:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:10,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:15,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:15,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-12 16:03:15,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:15,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4900 [2020-10-12 16:03:15,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:03:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:15,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 301 [2020-10-12 16:03:15,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:16,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:16,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:16,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:16,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:16,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:16,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:03:16,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:16,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:16,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:16,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:16,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 32407 backedges. 0 proven. 31142 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-12 16:03:16,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774355380] [2020-10-12 16:03:16,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:16,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:03:16,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342645274] [2020-10-12 16:03:16,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:03:16,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:16,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:03:16,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:03:16,175 INFO L87 Difference]: Start difference. First operand 310 states and 333 transitions. Second operand 26 states. [2020-10-12 16:03:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:16,988 INFO L93 Difference]: Finished difference Result 340 states and 365 transitions. [2020-10-12 16:03:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:03:16,988 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 309 [2020-10-12 16:03:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:16,990 INFO L225 Difference]: With dead ends: 340 [2020-10-12 16:03:16,990 INFO L226 Difference]: Without dead ends: 335 [2020-10-12 16:03:16,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:03:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-12 16:03:17,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 323. [2020-10-12 16:03:17,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-12 16:03:17,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 347 transitions. [2020-10-12 16:03:17,023 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 347 transitions. Word has length 309 [2020-10-12 16:03:17,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:17,024 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 347 transitions. [2020-10-12 16:03:17,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:03:17,024 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 347 transitions. [2020-10-12 16:03:17,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-12 16:03:17,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:17,026 INFO L422 BasicCegarLoop]: trace histogram [240, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:17,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:03:17,027 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:17,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:17,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1302885583, now seen corresponding path program 22 times [2020-10-12 16:03:17,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:17,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239680529] [2020-10-12 16:03:17,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:17,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:22,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:22,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:22,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-12 16:03:22,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:03:22,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-12 16:03:22,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:22,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:03:22,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:22,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 319 [2020-10-12 16:03:22,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:23,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:23,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:23,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:23,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:23,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:23,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:03:23,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:23,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:23,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:23,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:23,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 35292 backedges. 0 proven. 33972 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2020-10-12 16:03:23,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239680529] [2020-10-12 16:03:23,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:23,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:03:23,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202862890] [2020-10-12 16:03:23,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:03:23,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:23,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:03:23,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:03:23,182 INFO L87 Difference]: Start difference. First operand 323 states and 347 transitions. Second operand 29 states. [2020-10-12 16:03:24,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:24,495 INFO L93 Difference]: Finished difference Result 353 states and 379 transitions. [2020-10-12 16:03:24,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:03:24,496 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 322 [2020-10-12 16:03:24,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:24,498 INFO L225 Difference]: With dead ends: 353 [2020-10-12 16:03:24,498 INFO L226 Difference]: Without dead ends: 348 [2020-10-12 16:03:24,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:03:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-12 16:03:24,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 336. [2020-10-12 16:03:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-12 16:03:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 361 transitions. [2020-10-12 16:03:24,554 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 361 transitions. Word has length 322 [2020-10-12 16:03:24,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:24,555 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 361 transitions. [2020-10-12 16:03:24,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:03:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 361 transitions. [2020-10-12 16:03:24,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-12 16:03:24,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:24,560 INFO L422 BasicCegarLoop]: trace histogram [250, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:24,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:03:24,560 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:24,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:24,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1267605576, now seen corresponding path program 23 times [2020-10-12 16:03:24,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:24,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647080838] [2020-10-12 16:03:24,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:24,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:29,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:29,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-12 16:03:29,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:29,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-12 16:03:29,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:29,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:03:29,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:29,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 327 [2020-10-12 16:03:29,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:30,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:30,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:30,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:30,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:30,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:30,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:03:30,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:30,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:30,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:30,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:30,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2020-10-12 16:03:30,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647080838] [2020-10-12 16:03:30,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:30,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:03:30,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647953880] [2020-10-12 16:03:30,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:03:30,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:30,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:03:30,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:03:30,665 INFO L87 Difference]: Start difference. First operand 336 states and 361 transitions. Second operand 28 states. [2020-10-12 16:03:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:31,590 INFO L93 Difference]: Finished difference Result 366 states and 393 transitions. [2020-10-12 16:03:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:03:31,591 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 335 [2020-10-12 16:03:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:31,593 INFO L225 Difference]: With dead ends: 366 [2020-10-12 16:03:31,593 INFO L226 Difference]: Without dead ends: 361 [2020-10-12 16:03:31,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:03:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-12 16:03:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 349. [2020-10-12 16:03:31,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-12 16:03:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 375 transitions. [2020-10-12 16:03:31,638 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 375 transitions. Word has length 335 [2020-10-12 16:03:31,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:31,639 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 375 transitions. [2020-10-12 16:03:31,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:03:31,639 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 375 transitions. [2020-10-12 16:03:31,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-10-12 16:03:31,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:31,641 INFO L422 BasicCegarLoop]: trace histogram [260, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:31,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:03:31,642 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:31,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:31,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1320509073, now seen corresponding path program 24 times [2020-10-12 16:03:31,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:31,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289123092] [2020-10-12 16:03:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:31,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:36,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:36,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-12 16:03:36,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:36,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-12 16:03:36,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:36,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:03:36,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:36,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 340 [2020-10-12 16:03:36,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:37,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:37,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:37,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:37,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:37,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:37,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:03:37,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:37,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:37,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:37,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:37,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 41431 backedges. 0 proven. 40001 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2020-10-12 16:03:37,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289123092] [2020-10-12 16:03:37,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:37,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:03:37,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696295070] [2020-10-12 16:03:37,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:03:37,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:37,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:03:37,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:03:37,769 INFO L87 Difference]: Start difference. First operand 349 states and 375 transitions. Second operand 29 states. [2020-10-12 16:03:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:38,790 INFO L93 Difference]: Finished difference Result 379 states and 407 transitions. [2020-10-12 16:03:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:03:38,790 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 348 [2020-10-12 16:03:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:38,792 INFO L225 Difference]: With dead ends: 379 [2020-10-12 16:03:38,793 INFO L226 Difference]: Without dead ends: 374 [2020-10-12 16:03:38,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:03:38,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-12 16:03:38,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 362. [2020-10-12 16:03:38,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-12 16:03:38,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 389 transitions. [2020-10-12 16:03:38,833 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 389 transitions. Word has length 348 [2020-10-12 16:03:38,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:38,834 INFO L479 AbstractCegarLoop]: Abstraction has 362 states and 389 transitions. [2020-10-12 16:03:38,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:03:38,834 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 389 transitions. [2020-10-12 16:03:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-10-12 16:03:38,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:38,836 INFO L422 BasicCegarLoop]: trace histogram [270, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:38,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:03:38,837 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:38,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1468958808, now seen corresponding path program 25 times [2020-10-12 16:03:38,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:38,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563566521] [2020-10-12 16:03:38,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:39,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:44,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:44,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 369 [2020-10-12 16:03:44,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:44,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-12 16:03:44,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:44,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:03:44,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:44,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 353 [2020-10-12 16:03:44,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:44,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:44,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:44,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:44,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:44,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:44,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:03:44,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:44,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:44,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:44,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:44,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 44685 backedges. 0 proven. 43200 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2020-10-12 16:03:44,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563566521] [2020-10-12 16:03:44,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:44,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:03:44,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591162088] [2020-10-12 16:03:44,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:03:44,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:44,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:03:44,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:03:44,996 INFO L87 Difference]: Start difference. First operand 362 states and 389 transitions. Second operand 30 states. [2020-10-12 16:03:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:46,107 INFO L93 Difference]: Finished difference Result 392 states and 421 transitions. [2020-10-12 16:03:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:03:46,108 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 361 [2020-10-12 16:03:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:46,110 INFO L225 Difference]: With dead ends: 392 [2020-10-12 16:03:46,111 INFO L226 Difference]: Without dead ends: 387 [2020-10-12 16:03:46,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:03:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-12 16:03:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 375. [2020-10-12 16:03:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-10-12 16:03:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 403 transitions. [2020-10-12 16:03:46,155 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 403 transitions. Word has length 361 [2020-10-12 16:03:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:46,156 INFO L479 AbstractCegarLoop]: Abstraction has 375 states and 403 transitions. [2020-10-12 16:03:46,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:03:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 403 transitions. [2020-10-12 16:03:46,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-10-12 16:03:46,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:46,159 INFO L422 BasicCegarLoop]: trace histogram [280, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:46,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:03:46,159 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:46,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:46,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1342683633, now seen corresponding path program 26 times [2020-10-12 16:03:46,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:46,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685578789] [2020-10-12 16:03:46,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:46,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:51,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:51,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-12 16:03:51,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:51,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5194 [2020-10-12 16:03:51,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:51,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:03:51,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:51,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 366 [2020-10-12 16:03:51,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:52,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:52,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:52,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:52,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:03:52,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:52,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:03:52,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:52,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:52,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:52,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:52,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 48062 backedges. 0 proven. 46522 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2020-10-12 16:03:52,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685578789] [2020-10-12 16:03:52,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:52,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:03:52,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509735506] [2020-10-12 16:03:52,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:03:52,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:52,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:03:52,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:03:52,638 INFO L87 Difference]: Start difference. First operand 375 states and 403 transitions. Second operand 31 states. [2020-10-12 16:03:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:53,802 INFO L93 Difference]: Finished difference Result 405 states and 435 transitions. [2020-10-12 16:03:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:03:53,806 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 374 [2020-10-12 16:03:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:53,808 INFO L225 Difference]: With dead ends: 405 [2020-10-12 16:03:53,808 INFO L226 Difference]: Without dead ends: 400 [2020-10-12 16:03:53,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:03:53,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-12 16:03:53,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 388. [2020-10-12 16:03:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-10-12 16:03:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 417 transitions. [2020-10-12 16:03:53,846 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 417 transitions. Word has length 374 [2020-10-12 16:03:53,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:53,846 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 417 transitions. [2020-10-12 16:03:53,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:03:53,846 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 417 transitions. [2020-10-12 16:03:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-10-12 16:03:53,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:53,848 INFO L422 BasicCegarLoop]: trace histogram [290, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:53,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:03:53,848 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:53,848 INFO L82 PathProgramCache]: Analyzing trace with hash 357804280, now seen corresponding path program 27 times [2020-10-12 16:03:53,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:53,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304428950] [2020-10-12 16:03:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:54,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:59,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:59,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 395 [2020-10-12 16:03:59,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:59,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-12 16:03:59,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:59,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:03:59,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:03:59,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 379 [2020-10-12 16:03:59,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:00,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:04:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:00,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:00,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:00,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:04:00,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:00,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:04:00,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:00,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:04:00,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:04:00,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:04:00,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 51562 backedges. 0 proven. 49967 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2020-10-12 16:04:00,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304428950] [2020-10-12 16:04:00,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:04:00,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:04:00,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597904531] [2020-10-12 16:04:00,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:04:00,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:04:00,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:04:00,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:04:00,206 INFO L87 Difference]: Start difference. First operand 388 states and 417 transitions. Second operand 32 states. [2020-10-12 16:04:01,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:04:01,470 INFO L93 Difference]: Finished difference Result 418 states and 449 transitions. [2020-10-12 16:04:01,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:04:01,474 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 387 [2020-10-12 16:04:01,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:04:01,476 INFO L225 Difference]: With dead ends: 418 [2020-10-12 16:04:01,477 INFO L226 Difference]: Without dead ends: 413 [2020-10-12 16:04:01,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:04:01,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-12 16:04:01,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 401. [2020-10-12 16:04:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-12 16:04:01,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 431 transitions. [2020-10-12 16:04:01,529 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 431 transitions. Word has length 387 [2020-10-12 16:04:01,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:04:01,529 INFO L479 AbstractCegarLoop]: Abstraction has 401 states and 431 transitions. [2020-10-12 16:04:01,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:04:01,530 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 431 transitions. [2020-10-12 16:04:01,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2020-10-12 16:04:01,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:04:01,533 INFO L422 BasicCegarLoop]: trace histogram [300, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:04:01,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:04:01,533 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:04:01,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:04:01,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1103848111, now seen corresponding path program 28 times [2020-10-12 16:04:01,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:04:01,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539186915] [2020-10-12 16:04:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:04:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:01,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:06,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:06,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 408 [2020-10-12 16:04:06,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:06,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-12 16:04:06,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:06,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:04:06,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:04:06,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 392 [2020-10-12 16:04:06,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:07,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:04:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:07,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:07,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:07,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:04:07,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:07,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:04:07,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:07,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:04:07,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:04:07,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:04:07,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 55185 backedges. 0 proven. 53535 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-12 16:04:07,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539186915] [2020-10-12 16:04:07,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:04:07,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:04:07,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768595103] [2020-10-12 16:04:07,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:04:07,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:04:07,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:04:07,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:04:07,980 INFO L87 Difference]: Start difference. First operand 401 states and 431 transitions. Second operand 33 states. [2020-10-12 16:04:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:04:09,307 INFO L93 Difference]: Finished difference Result 431 states and 463 transitions. [2020-10-12 16:04:09,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:04:09,307 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 400 [2020-10-12 16:04:09,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:04:09,310 INFO L225 Difference]: With dead ends: 431 [2020-10-12 16:04:09,310 INFO L226 Difference]: Without dead ends: 426 [2020-10-12 16:04:09,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:04:09,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-12 16:04:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 414. [2020-10-12 16:04:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-12 16:04:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 445 transitions. [2020-10-12 16:04:09,359 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 445 transitions. Word has length 400 [2020-10-12 16:04:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:04:09,359 INFO L479 AbstractCegarLoop]: Abstraction has 414 states and 445 transitions. [2020-10-12 16:04:09,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:04:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 445 transitions. [2020-10-12 16:04:09,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-10-12 16:04:09,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:04:09,362 INFO L422 BasicCegarLoop]: trace histogram [310, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:04:09,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:04:09,363 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:04:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:04:09,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1805336984, now seen corresponding path program 29 times [2020-10-12 16:04:09,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:04:09,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149155281] [2020-10-12 16:04:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:04:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:09,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:14,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:14,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 421 [2020-10-12 16:04:14,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:14,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 16:04:14,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:14,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:04:14,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:04:14,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 405 [2020-10-12 16:04:14,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:15,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:04:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:15,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:15,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:15,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:04:15,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:15,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:04:15,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:15,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:04:15,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:04:15,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:04:15,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 58931 backedges. 0 proven. 57226 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2020-10-12 16:04:15,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149155281] [2020-10-12 16:04:15,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:04:15,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:04:15,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639641410] [2020-10-12 16:04:15,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:04:15,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:04:15,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:04:15,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:04:15,902 INFO L87 Difference]: Start difference. First operand 414 states and 445 transitions. Second operand 34 states. [2020-10-12 16:04:17,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:04:17,307 INFO L93 Difference]: Finished difference Result 444 states and 477 transitions. [2020-10-12 16:04:17,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:04:17,307 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 413 [2020-10-12 16:04:17,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:04:17,309 INFO L225 Difference]: With dead ends: 444 [2020-10-12 16:04:17,309 INFO L226 Difference]: Without dead ends: 439 [2020-10-12 16:04:17,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:04:17,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-12 16:04:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 427. [2020-10-12 16:04:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-12 16:04:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 459 transitions. [2020-10-12 16:04:17,367 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 459 transitions. Word has length 413 [2020-10-12 16:04:17,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:04:17,367 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 459 transitions. [2020-10-12 16:04:17,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:04:17,367 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 459 transitions. [2020-10-12 16:04:17,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-10-12 16:04:17,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:04:17,370 INFO L422 BasicCegarLoop]: trace histogram [320, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:04:17,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:04:17,371 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:04:17,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:04:17,371 INFO L82 PathProgramCache]: Analyzing trace with hash -308148047, now seen corresponding path program 30 times [2020-10-12 16:04:17,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:04:17,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223400195] [2020-10-12 16:04:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:04:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:17,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:22,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:22,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 434 [2020-10-12 16:04:22,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:22,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 16:04:22,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:22,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:04:22,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:04:22,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 418 [2020-10-12 16:04:22,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:23,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:04:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:23,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:23,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:23,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:04:23,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:23,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:04:23,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:23,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:04:23,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:04:23,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:04:23,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 62800 backedges. 0 proven. 61040 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2020-10-12 16:04:23,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223400195] [2020-10-12 16:04:23,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:04:23,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:04:23,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124922342] [2020-10-12 16:04:23,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:04:23,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:04:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:04:23,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:04:23,997 INFO L87 Difference]: Start difference. First operand 427 states and 459 transitions. Second operand 35 states. [2020-10-12 16:04:25,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:04:25,472 INFO L93 Difference]: Finished difference Result 457 states and 491 transitions. [2020-10-12 16:04:25,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:04:25,473 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 426 [2020-10-12 16:04:25,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:04:25,475 INFO L225 Difference]: With dead ends: 457 [2020-10-12 16:04:25,475 INFO L226 Difference]: Without dead ends: 452 [2020-10-12 16:04:25,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:04:25,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-12 16:04:25,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 440. [2020-10-12 16:04:25,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-10-12 16:04:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 473 transitions. [2020-10-12 16:04:25,536 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 473 transitions. Word has length 426 [2020-10-12 16:04:25,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:04:25,536 INFO L479 AbstractCegarLoop]: Abstraction has 440 states and 473 transitions. [2020-10-12 16:04:25,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:04:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 473 transitions. [2020-10-12 16:04:25,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2020-10-12 16:04:25,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:04:25,539 INFO L422 BasicCegarLoop]: trace histogram [330, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:04:25,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:04:25,540 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:04:25,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:04:25,540 INFO L82 PathProgramCache]: Analyzing trace with hash -608218568, now seen corresponding path program 31 times [2020-10-12 16:04:25,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:04:25,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187371772] [2020-10-12 16:04:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:04:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:25,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:30,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:30,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 447 [2020-10-12 16:04:30,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:30,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5196 [2020-10-12 16:04:30,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:30,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:04:30,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:04:30,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 431 [2020-10-12 16:04:30,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:32,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:04:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:04:32,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:04:32,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:04:32,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:04:32,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:04:32,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:04:32,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:04:32,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:04:32,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:04:32,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:04:32,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:04:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 66792 backedges. 0 proven. 64977 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2020-10-12 16:04:32,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187371772] [2020-10-12 16:04:32,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:04:32,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:04:32,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996860997] [2020-10-12 16:04:32,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:04:32,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:04:32,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:04:32,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:04:32,269 INFO L87 Difference]: Start difference. First operand 440 states and 473 transitions. Second operand 36 states. [2020-10-12 16:04:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:04:33,854 INFO L93 Difference]: Finished difference Result 470 states and 505 transitions. [2020-10-12 16:04:33,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:04:33,854 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 439 [2020-10-12 16:04:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:04:33,856 INFO L225 Difference]: With dead ends: 470 [2020-10-12 16:04:33,856 INFO L226 Difference]: Without dead ends: 465 [2020-10-12 16:04:33,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:04:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states.