/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:16:27,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:16:27,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:16:27,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:16:27,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:16:27,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:16:27,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:16:27,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:16:27,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:16:27,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:16:27,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:16:27,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:16:27,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:16:27,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:16:27,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:16:27,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:16:27,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:16:27,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:16:27,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:16:27,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:16:27,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:16:27,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:16:28,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:16:28,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:16:28,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:16:28,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:16:28,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:16:28,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:16:28,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:16:28,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:16:28,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:16:28,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:16:28,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:16:28,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:16:28,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:16:28,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:16:28,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:16:28,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:16:28,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:16:28,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:16:28,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:16:28,031 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:16:28,078 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:16:28,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:16:28,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:16:28,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:16:28,082 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:16:28,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:16:28,083 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:16:28,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:16:28,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:16:28,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:16:28,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:16:28,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:16:28,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:16:28,086 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:16:28,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:16:28,086 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:16:28,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:16:28,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:16:28,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:16:28,087 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:16:28,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:16:28,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:16:28,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:16:28,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:16:28,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:16:28,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:16:28,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:16:28,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:16:28,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:16:28,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:16:28,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:16:28,419 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:16:28,423 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:16:28,426 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:16:28,427 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:16:28,428 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c [2020-10-13 10:16:28,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8721fd002/1ef74c0fede14222aac680c186259254/FLAGac45a6a34 [2020-10-13 10:16:29,036 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:16:29,037 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c [2020-10-13 10:16:29,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8721fd002/1ef74c0fede14222aac680c186259254/FLAGac45a6a34 [2020-10-13 10:16:29,410 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8721fd002/1ef74c0fede14222aac680c186259254 [2020-10-13 10:16:29,425 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:16:29,427 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:16:29,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:16:29,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:16:29,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:16:29,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:16:29" (1/1) ... [2020-10-13 10:16:29,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4700e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:29, skipping insertion in model container [2020-10-13 10:16:29,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:16:29" (1/1) ... [2020-10-13 10:16:29,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:16:29,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:16:29,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:16:29,832 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:16:30,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:16:30,056 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:16:30,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:30 WrapperNode [2020-10-13 10:16:30,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:16:30,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:16:30,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:16:30,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:16:30,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:30" (1/1) ... [2020-10-13 10:16:30,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:30" (1/1) ... [2020-10-13 10:16:30,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:30" (1/1) ... [2020-10-13 10:16:30,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:30" (1/1) ... [2020-10-13 10:16:30,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:30" (1/1) ... [2020-10-13 10:16:30,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:30" (1/1) ... [2020-10-13 10:16:30,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:30" (1/1) ... [2020-10-13 10:16:30,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:16:30,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:16:30,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:16:30,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:16:30,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:16:30,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:16:30,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:16:30,221 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:16:30,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:16:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:16:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-13 10:16:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:16:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:16:30,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:16:30,222 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-13 10:16:30,222 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-10-13 10:16:30,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:16:30,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:16:30,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:16:30,884 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:16:30,884 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 10:16:30,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:16:30 BoogieIcfgContainer [2020-10-13 10:16:30,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:16:30,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:16:30,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:16:30,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:16:30,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:16:29" (1/3) ... [2020-10-13 10:16:30,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a70313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:16:30, skipping insertion in model container [2020-10-13 10:16:30,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:16:30" (2/3) ... [2020-10-13 10:16:30,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a70313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:16:30, skipping insertion in model container [2020-10-13 10:16:30,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:16:30" (3/3) ... [2020-10-13 10:16:30,901 INFO L109 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.v+lhb-reducer.c [2020-10-13 10:16:30,919 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:16:30,928 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:16:30,946 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:16:30,977 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:16:30,978 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:16:30,978 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:16:30,978 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:16:30,978 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:16:30,979 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:16:30,979 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:16:30,979 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:16:31,004 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-10-13 10:16:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:16:31,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:31,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:31,017 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:31,025 INFO L82 PathProgramCache]: Analyzing trace with hash 276774602, now seen corresponding path program 1 times [2020-10-13 10:16:31,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:31,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577887520] [2020-10-13 10:16:31,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:31,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:31,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:33,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:33,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:16:33,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:16:33,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2037 [2020-10-13 10:16:33,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:33,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:16:33,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 10:16:33,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:16:33,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:16:33,817 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:33,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:33,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:33,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:33,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:33,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:33,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-13 10:16:33,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:33,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:33,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:33,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:33,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:33,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577887520] [2020-10-13 10:16:33,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:16:33,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:16:33,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414099219] [2020-10-13 10:16:33,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:16:33,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:33,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:16:33,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:16:33,933 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 5 states. [2020-10-13 10:16:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:34,368 INFO L93 Difference]: Finished difference Result 69 states and 111 transitions. [2020-10-13 10:16:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:16:34,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-10-13 10:16:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:34,384 INFO L225 Difference]: With dead ends: 69 [2020-10-13 10:16:34,385 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 10:16:34,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:16:34,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 10:16:34,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 10:16:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:16:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-13 10:16:34,444 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 49 [2020-10-13 10:16:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:34,445 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-13 10:16:34,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:16:34,445 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-13 10:16:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:16:34,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:34,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:34,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:16:34,448 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:34,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:34,449 INFO L82 PathProgramCache]: Analyzing trace with hash 291878639, now seen corresponding path program 1 times [2020-10-13 10:16:34,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:34,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912405327] [2020-10-13 10:16:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:34,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:35,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:35,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:16:35,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:35,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-13 10:16:35,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:35,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:16:35,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:35,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:16:35,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:35,462 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:35,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:35,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:35,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:35,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:35,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:35,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:16:35,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:35,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:35,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:35,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:35,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:35,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912405327] [2020-10-13 10:16:35,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:16:35,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-13 10:16:35,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265305159] [2020-10-13 10:16:35,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:16:35,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:35,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:16:35,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:16:35,516 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 13 states. [2020-10-13 10:16:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:35,823 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-13 10:16:35,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:16:35,824 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-13 10:16:35,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:35,826 INFO L225 Difference]: With dead ends: 68 [2020-10-13 10:16:35,826 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 10:16:35,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:16:35,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 10:16:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-10-13 10:16:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:16:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-13 10:16:35,840 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 49 [2020-10-13 10:16:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:35,841 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-13 10:16:35,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:16:35,842 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-13 10:16:35,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:16:35,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:35,844 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:35,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:16:35,845 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:35,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1715419205, now seen corresponding path program 1 times [2020-10-13 10:16:35,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:35,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637222744] [2020-10-13 10:16:35,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:35,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:36,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:36,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:16:36,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:36,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-13 10:16:36,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:36,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:16:36,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:36,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:16:36,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:37,037 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:37,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:37,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:37,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:37,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:37,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:37,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 10:16:37,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:37,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:37,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:37,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:37,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:37,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637222744] [2020-10-13 10:16:37,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:37,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:16:37,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963018043] [2020-10-13 10:16:37,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:16:37,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:37,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:16:37,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:16:37,092 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 14 states. [2020-10-13 10:16:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:37,385 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-13 10:16:37,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:16:37,385 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-13 10:16:37,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:37,387 INFO L225 Difference]: With dead ends: 74 [2020-10-13 10:16:37,387 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 10:16:37,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:16:37,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 10:16:37,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-10-13 10:16:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 10:16:37,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-13 10:16:37,398 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 54 [2020-10-13 10:16:37,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:37,399 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-13 10:16:37,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:16:37,399 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-13 10:16:37,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:16:37,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:37,401 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:37,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:16:37,402 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:37,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:37,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1142139281, now seen corresponding path program 2 times [2020-10-13 10:16:37,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:37,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050970980] [2020-10-13 10:16:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:37,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:38,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:38,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:16:38,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:38,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 729 [2020-10-13 10:16:38,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:38,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:16:38,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:38,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:16:38,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:38,552 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:38,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:38,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:38,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:38,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:38,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:38,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 10:16:38,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:38,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:38,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:38,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:38,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:16:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:38,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050970980] [2020-10-13 10:16:38,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:38,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:16:38,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926525081] [2020-10-13 10:16:38,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:16:38,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:38,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:16:38,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:16:38,592 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 15 states. [2020-10-13 10:16:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:38,853 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2020-10-13 10:16:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:16:38,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-13 10:16:38,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:38,855 INFO L225 Difference]: With dead ends: 80 [2020-10-13 10:16:38,855 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 10:16:38,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:16:38,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 10:16:38,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2020-10-13 10:16:38,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:16:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2020-10-13 10:16:38,879 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 59 [2020-10-13 10:16:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:38,880 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2020-10-13 10:16:38,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:16:38,880 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2020-10-13 10:16:38,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:16:38,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:38,886 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:38,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:16:38,887 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:38,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:38,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1074669509, now seen corresponding path program 3 times [2020-10-13 10:16:38,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:38,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107897812] [2020-10-13 10:16:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:38,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:39,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:39,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:16:39,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:39,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-10-13 10:16:39,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:16:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:16:39,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:40,066 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:40,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:40,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:40,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:40,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:40,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:40,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:16:40,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:40,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:40,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:40,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:40,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:40,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107897812] [2020-10-13 10:16:40,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:40,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:16:40,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640166788] [2020-10-13 10:16:40,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:16:40,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:40,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:16:40,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:16:40,123 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 16 states. [2020-10-13 10:16:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:40,514 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-10-13 10:16:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:16:40,516 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-10-13 10:16:40,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:40,518 INFO L225 Difference]: With dead ends: 86 [2020-10-13 10:16:40,520 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 10:16:40,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:16:40,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 10:16:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2020-10-13 10:16:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 10:16:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2020-10-13 10:16:40,547 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 64 [2020-10-13 10:16:40,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:40,549 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2020-10-13 10:16:40,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:16:40,549 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2020-10-13 10:16:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:16:40,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:40,551 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:40,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:16:40,552 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:40,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:40,553 INFO L82 PathProgramCache]: Analyzing trace with hash -195979793, now seen corresponding path program 4 times [2020-10-13 10:16:40,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:40,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074459943] [2020-10-13 10:16:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:40,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:41,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:41,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:16:41,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:41,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 851 [2020-10-13 10:16:41,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:41,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:16:41,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:41,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 10:16:41,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:41,888 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:41,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:41,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:41,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:41,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:41,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:41,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:16:41,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:41,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:41,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:41,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:41,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:41,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074459943] [2020-10-13 10:16:41,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:41,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:16:41,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045607715] [2020-10-13 10:16:41,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:16:41,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:41,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:16:41,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:16:41,925 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand 17 states. [2020-10-13 10:16:42,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:42,226 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-10-13 10:16:42,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:16:42,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-10-13 10:16:42,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:42,228 INFO L225 Difference]: With dead ends: 92 [2020-10-13 10:16:42,228 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 10:16:42,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:16:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 10:16:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-10-13 10:16:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 10:16:42,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2020-10-13 10:16:42,237 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 69 [2020-10-13 10:16:42,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:42,238 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2020-10-13 10:16:42,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:16:42,238 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2020-10-13 10:16:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 10:16:42,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:42,240 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:42,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:16:42,240 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1516783803, now seen corresponding path program 5 times [2020-10-13 10:16:42,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:42,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57863258] [2020-10-13 10:16:42,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:42,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:43,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:43,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:16:43,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:43,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 795 [2020-10-13 10:16:43,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:43,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:16:43,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:43,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 10:16:43,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:43,509 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:43,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:43,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:43,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:43,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:43,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:43,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:16:43,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:43,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:43,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:43,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:43,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:43,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57863258] [2020-10-13 10:16:43,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:43,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:16:43,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104655482] [2020-10-13 10:16:43,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:16:43,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:43,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:16:43,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:16:43,578 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 18 states. [2020-10-13 10:16:44,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:44,004 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2020-10-13 10:16:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:16:44,005 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 74 [2020-10-13 10:16:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:44,007 INFO L225 Difference]: With dead ends: 98 [2020-10-13 10:16:44,007 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 10:16:44,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:16:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 10:16:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2020-10-13 10:16:44,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 10:16:44,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2020-10-13 10:16:44,023 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 74 [2020-10-13 10:16:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:44,023 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2020-10-13 10:16:44,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:16:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2020-10-13 10:16:44,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 10:16:44,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:44,028 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:44,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:16:44,032 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:44,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:44,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1825404271, now seen corresponding path program 6 times [2020-10-13 10:16:44,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:44,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676570754] [2020-10-13 10:16:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:44,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:45,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:45,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 10:16:45,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:45,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-10-13 10:16:45,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:45,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:16:45,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:45,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 10:16:45,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:45,514 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:45,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:45,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:45,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:45,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:45,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:45,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:16:45,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:45,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:45,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:45,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:45,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676570754] [2020-10-13 10:16:45,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:45,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:16:45,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203913739] [2020-10-13 10:16:45,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:16:45,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:45,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:16:45,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:16:45,557 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 19 states. [2020-10-13 10:16:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:45,823 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2020-10-13 10:16:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:16:45,824 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-10-13 10:16:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:45,825 INFO L225 Difference]: With dead ends: 104 [2020-10-13 10:16:45,825 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 10:16:45,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:16:45,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 10:16:45,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-10-13 10:16:45,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 10:16:45,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2020-10-13 10:16:45,843 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 79 [2020-10-13 10:16:45,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:45,844 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2020-10-13 10:16:45,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:16:45,844 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2020-10-13 10:16:45,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 10:16:45,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:45,848 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:45,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:16:45,849 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:45,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1508645179, now seen corresponding path program 7 times [2020-10-13 10:16:45,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:45,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016324914] [2020-10-13 10:16:45,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:45,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:46,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:46,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 10:16:46,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:46,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 812 [2020-10-13 10:16:46,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:16:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 10:16:46,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:47,153 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:47,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:47,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:47,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:47,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:47,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:47,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:16:47,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:47,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:47,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:47,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:47,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:47,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016324914] [2020-10-13 10:16:47,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:47,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:16:47,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585529678] [2020-10-13 10:16:47,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:16:47,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:47,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:16:47,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:16:47,217 INFO L87 Difference]: Start difference. First operand 93 states and 108 transitions. Second operand 20 states. [2020-10-13 10:16:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:47,511 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2020-10-13 10:16:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:16:47,512 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 84 [2020-10-13 10:16:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:47,513 INFO L225 Difference]: With dead ends: 110 [2020-10-13 10:16:47,513 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 10:16:47,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:16:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 10:16:47,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2020-10-13 10:16:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 10:16:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2020-10-13 10:16:47,527 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 84 [2020-10-13 10:16:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:47,528 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2020-10-13 10:16:47,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:16:47,528 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2020-10-13 10:16:47,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 10:16:47,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:47,529 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:47,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:16:47,530 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:47,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:47,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1905784047, now seen corresponding path program 8 times [2020-10-13 10:16:47,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:47,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050463283] [2020-10-13 10:16:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:47,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:48,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:48,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 10:16:48,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:48,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 818 [2020-10-13 10:16:48,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:48,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:16:48,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:48,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-13 10:16:48,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:48,891 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:48,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:48,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:48,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:48,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:48,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:48,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:16:48,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:48,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:48,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:48,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:48,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:48,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050463283] [2020-10-13 10:16:48,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:48,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:16:48,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108436811] [2020-10-13 10:16:48,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:16:48,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:48,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:16:48,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:16:48,928 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 21 states. [2020-10-13 10:16:49,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:49,158 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-10-13 10:16:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:16:49,159 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-10-13 10:16:49,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:49,160 INFO L225 Difference]: With dead ends: 116 [2020-10-13 10:16:49,160 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 10:16:49,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:16:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 10:16:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-10-13 10:16:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 10:16:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2020-10-13 10:16:49,168 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 89 [2020-10-13 10:16:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:49,169 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2020-10-13 10:16:49,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:16:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2020-10-13 10:16:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 10:16:49,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:49,171 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:49,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:16:49,171 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:49,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1430604219, now seen corresponding path program 9 times [2020-10-13 10:16:49,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:49,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522173995] [2020-10-13 10:16:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:49,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:50,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:50,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 10:16:50,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:50,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-13 10:16:50,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:50,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:16:50,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:50,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 10:16:50,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:50,620 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:50,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:50,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:50,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:50,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:50,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:50,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:16:50,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:50,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:50,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:50,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:50,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:50,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522173995] [2020-10-13 10:16:50,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:50,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:16:50,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891386248] [2020-10-13 10:16:50,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:16:50,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:50,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:16:50,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:16:50,674 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand 22 states. [2020-10-13 10:16:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:51,050 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2020-10-13 10:16:51,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:16:51,051 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 94 [2020-10-13 10:16:51,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:51,053 INFO L225 Difference]: With dead ends: 122 [2020-10-13 10:16:51,053 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 10:16:51,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:16:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 10:16:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2020-10-13 10:16:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 10:16:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2020-10-13 10:16:51,072 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 94 [2020-10-13 10:16:51,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:51,073 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2020-10-13 10:16:51,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:16:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2020-10-13 10:16:51,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 10:16:51,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:51,078 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:51,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:16:51,079 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:51,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:51,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1760105583, now seen corresponding path program 10 times [2020-10-13 10:16:51,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:51,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759302514] [2020-10-13 10:16:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:51,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:52,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:52,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 10:16:52,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:52,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1057 [2020-10-13 10:16:52,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:52,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:16:52,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:52,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-13 10:16:52,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:52,725 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:52,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:52,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:52,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:52,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:52,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:52,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:16:52,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:52,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:52,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:52,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:52,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:52,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759302514] [2020-10-13 10:16:52,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:52,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:16:52,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735939279] [2020-10-13 10:16:52,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:16:52,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:52,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:16:52,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:16:52,779 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand 23 states. [2020-10-13 10:16:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:53,072 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2020-10-13 10:16:53,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:16:53,073 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 99 [2020-10-13 10:16:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:53,074 INFO L225 Difference]: With dead ends: 128 [2020-10-13 10:16:53,074 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 10:16:53,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:16:53,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 10:16:53,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2020-10-13 10:16:53,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 10:16:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2020-10-13 10:16:53,086 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 99 [2020-10-13 10:16:53,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:53,087 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2020-10-13 10:16:53,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:16:53,087 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2020-10-13 10:16:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 10:16:53,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:53,090 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:53,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:16:53,090 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:53,091 INFO L82 PathProgramCache]: Analyzing trace with hash 154917435, now seen corresponding path program 11 times [2020-10-13 10:16:53,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:53,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035449743] [2020-10-13 10:16:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:53,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:54,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:54,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 10:16:54,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:54,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1216 [2020-10-13 10:16:54,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:54,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:16:54,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:54,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-13 10:16:54,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:54,884 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:54,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:54,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:54,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:54,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:54,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:54,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:16:54,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:54,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:54,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:54,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:54,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:54,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035449743] [2020-10-13 10:16:54,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:54,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:16:54,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782782069] [2020-10-13 10:16:54,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:16:54,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:54,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:16:54,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:16:54,926 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand 24 states. [2020-10-13 10:16:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:55,264 INFO L93 Difference]: Finished difference Result 134 states and 162 transitions. [2020-10-13 10:16:55,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:16:55,265 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 104 [2020-10-13 10:16:55,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:55,267 INFO L225 Difference]: With dead ends: 134 [2020-10-13 10:16:55,267 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 10:16:55,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:16:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 10:16:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2020-10-13 10:16:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 10:16:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2020-10-13 10:16:55,277 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 104 [2020-10-13 10:16:55,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:55,278 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2020-10-13 10:16:55,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:16:55,278 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2020-10-13 10:16:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 10:16:55,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:55,280 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:55,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:16:55,280 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:55,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:55,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1392038895, now seen corresponding path program 12 times [2020-10-13 10:16:55,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:55,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824604965] [2020-10-13 10:16:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:55,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:56,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:56,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 10:16:56,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:56,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1251 [2020-10-13 10:16:56,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:56,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:16:56,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:56,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-13 10:16:56,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:57,166 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:57,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:57,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:57,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:57,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:57,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:57,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:16:57,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:57,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:57,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:57,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:57,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:57,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824604965] [2020-10-13 10:16:57,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:57,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:16:57,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340649782] [2020-10-13 10:16:57,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:16:57,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:57,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:16:57,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:16:57,211 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand 25 states. [2020-10-13 10:16:57,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:57,535 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2020-10-13 10:16:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:16:57,536 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 109 [2020-10-13 10:16:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:57,538 INFO L225 Difference]: With dead ends: 140 [2020-10-13 10:16:57,538 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 10:16:57,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:16:57,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 10:16:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2020-10-13 10:16:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 10:16:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2020-10-13 10:16:57,549 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 109 [2020-10-13 10:16:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:57,549 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2020-10-13 10:16:57,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:16:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2020-10-13 10:16:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 10:16:57,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:57,551 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:57,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:16:57,551 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:57,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:57,552 INFO L82 PathProgramCache]: Analyzing trace with hash -661140805, now seen corresponding path program 13 times [2020-10-13 10:16:57,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:57,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180114943] [2020-10-13 10:16:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:57,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:59,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:59,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 10:16:59,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:59,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1497 [2020-10-13 10:16:59,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:59,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:16:59,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:16:59,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 10:16:59,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:59,713 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:16:59,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:59,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:59,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:59,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:59,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:59,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:16:59,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:59,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:59,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:59,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:59,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:59,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180114943] [2020-10-13 10:16:59,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:59,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:16:59,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927791986] [2020-10-13 10:16:59,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:16:59,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:59,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:16:59,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:16:59,763 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand 26 states. [2020-10-13 10:17:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:00,101 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2020-10-13 10:17:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:17:00,102 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 114 [2020-10-13 10:17:00,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:00,104 INFO L225 Difference]: With dead ends: 146 [2020-10-13 10:17:00,104 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 10:17:00,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:17:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 10:17:00,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2020-10-13 10:17:00,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-13 10:17:00,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 164 transitions. [2020-10-13 10:17:00,113 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 164 transitions. Word has length 114 [2020-10-13 10:17:00,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:00,113 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 164 transitions. [2020-10-13 10:17:00,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:17:00,114 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 164 transitions. [2020-10-13 10:17:00,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 10:17:00,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:00,115 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:00,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:17:00,116 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:00,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1241461615, now seen corresponding path program 14 times [2020-10-13 10:17:00,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:00,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343086856] [2020-10-13 10:17:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:00,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:01,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:01,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 10:17:01,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:01,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1474 [2020-10-13 10:17:01,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:17:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:01,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-13 10:17:01,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:02,219 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:02,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:02,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:02,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:02,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:02,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:02,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:17:02,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:02,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:02,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:02,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:02,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:02,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343086856] [2020-10-13 10:17:02,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:02,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:17:02,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820154842] [2020-10-13 10:17:02,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:17:02,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:02,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:17:02,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:17:02,258 INFO L87 Difference]: Start difference. First operand 135 states and 164 transitions. Second operand 27 states. [2020-10-13 10:17:02,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:02,606 INFO L93 Difference]: Finished difference Result 152 states and 186 transitions. [2020-10-13 10:17:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:17:02,607 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 119 [2020-10-13 10:17:02,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:02,609 INFO L225 Difference]: With dead ends: 152 [2020-10-13 10:17:02,609 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 10:17:02,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:17:02,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 10:17:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2020-10-13 10:17:02,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 10:17:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2020-10-13 10:17:02,618 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 119 [2020-10-13 10:17:02,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:02,619 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2020-10-13 10:17:02,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:17:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2020-10-13 10:17:02,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 10:17:02,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:02,620 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:02,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:17:02,621 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:02,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:02,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1277238075, now seen corresponding path program 15 times [2020-10-13 10:17:02,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:02,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270361333] [2020-10-13 10:17:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:02,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:03,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:03,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 10:17:03,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:03,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1049 [2020-10-13 10:17:03,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:03,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:17:03,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:03,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-13 10:17:03,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:04,359 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:04,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:04,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:04,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:04,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:04,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:04,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:17:04,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:04,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:04,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270361333] [2020-10-13 10:17:04,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:04,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:17:04,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358018587] [2020-10-13 10:17:04,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:17:04,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:04,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:17:04,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:17:04,409 INFO L87 Difference]: Start difference. First operand 141 states and 172 transitions. Second operand 28 states. [2020-10-13 10:17:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:04,765 INFO L93 Difference]: Finished difference Result 158 states and 194 transitions. [2020-10-13 10:17:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:17:04,766 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 124 [2020-10-13 10:17:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:04,768 INFO L225 Difference]: With dead ends: 158 [2020-10-13 10:17:04,768 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 10:17:04,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:17:04,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 10:17:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2020-10-13 10:17:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 10:17:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 180 transitions. [2020-10-13 10:17:04,778 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 180 transitions. Word has length 124 [2020-10-13 10:17:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:04,779 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 180 transitions. [2020-10-13 10:17:04,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:17:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 180 transitions. [2020-10-13 10:17:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 10:17:04,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:04,781 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:04,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:17:04,781 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:04,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:04,782 INFO L82 PathProgramCache]: Analyzing trace with hash 36975343, now seen corresponding path program 16 times [2020-10-13 10:17:04,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:04,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279985927] [2020-10-13 10:17:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:04,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:05,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:05,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 10:17:05,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:05,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1097 [2020-10-13 10:17:05,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:05,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:17:05,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:05,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-13 10:17:05,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:06,577 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:06,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:06,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:06,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:06,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:06,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:06,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 10:17:06,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:06,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:06,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:06,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:06,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:06,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279985927] [2020-10-13 10:17:06,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:06,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:17:06,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627501058] [2020-10-13 10:17:06,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:17:06,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:06,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:17:06,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:17:06,612 INFO L87 Difference]: Start difference. First operand 147 states and 180 transitions. Second operand 29 states. [2020-10-13 10:17:06,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:06,945 INFO L93 Difference]: Finished difference Result 164 states and 202 transitions. [2020-10-13 10:17:06,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:17:06,951 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2020-10-13 10:17:06,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:06,953 INFO L225 Difference]: With dead ends: 164 [2020-10-13 10:17:06,953 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 10:17:06,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:17:06,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 10:17:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2020-10-13 10:17:06,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 10:17:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 188 transitions. [2020-10-13 10:17:06,962 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 188 transitions. Word has length 129 [2020-10-13 10:17:06,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:06,962 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 188 transitions. [2020-10-13 10:17:06,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:17:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 188 transitions. [2020-10-13 10:17:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 10:17:06,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:06,965 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:06,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:17:06,965 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:06,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1835021381, now seen corresponding path program 17 times [2020-10-13 10:17:06,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:06,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556309615] [2020-10-13 10:17:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:07,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:08,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:08,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 10:17:08,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:08,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-13 10:17:08,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:08,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:17:08,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:08,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-13 10:17:08,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:08,736 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:08,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:08,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:08,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:08,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:08,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:08,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:17:08,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:08,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:08,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:08,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556309615] [2020-10-13 10:17:08,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:08,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:17:08,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917883873] [2020-10-13 10:17:08,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:17:08,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:08,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:17:08,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:17:08,782 INFO L87 Difference]: Start difference. First operand 153 states and 188 transitions. Second operand 30 states. [2020-10-13 10:17:09,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:09,121 INFO L93 Difference]: Finished difference Result 170 states and 210 transitions. [2020-10-13 10:17:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:17:09,122 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 134 [2020-10-13 10:17:09,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:09,124 INFO L225 Difference]: With dead ends: 170 [2020-10-13 10:17:09,124 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 10:17:09,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:17:09,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 10:17:09,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2020-10-13 10:17:09,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-13 10:17:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 196 transitions. [2020-10-13 10:17:09,134 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 196 transitions. Word has length 134 [2020-10-13 10:17:09,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:09,134 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 196 transitions. [2020-10-13 10:17:09,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:17:09,134 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 196 transitions. [2020-10-13 10:17:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 10:17:09,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:09,136 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:09,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:17:09,136 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:09,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1238356591, now seen corresponding path program 18 times [2020-10-13 10:17:09,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:09,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548423278] [2020-10-13 10:17:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:09,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:10,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:10,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 10:17:10,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:10,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1175 [2020-10-13 10:17:10,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:17:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-13 10:17:10,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:11,159 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:11,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:11,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:11,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:11,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:11,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:11,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:17:11,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:11,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:11,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:11,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:11,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:17:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:11,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548423278] [2020-10-13 10:17:11,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:11,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:17:11,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292957332] [2020-10-13 10:17:11,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:17:11,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:11,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:17:11,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:17:11,239 INFO L87 Difference]: Start difference. First operand 159 states and 196 transitions. Second operand 31 states. [2020-10-13 10:17:11,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:11,614 INFO L93 Difference]: Finished difference Result 176 states and 218 transitions. [2020-10-13 10:17:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:17:11,615 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 139 [2020-10-13 10:17:11,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:11,617 INFO L225 Difference]: With dead ends: 176 [2020-10-13 10:17:11,618 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 10:17:11,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:17:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 10:17:11,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2020-10-13 10:17:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-13 10:17:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 204 transitions. [2020-10-13 10:17:11,629 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 204 transitions. Word has length 139 [2020-10-13 10:17:11,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:11,629 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 204 transitions. [2020-10-13 10:17:11,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:17:11,630 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 204 transitions. [2020-10-13 10:17:11,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-13 10:17:11,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:11,631 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:11,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:17:11,632 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:11,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:11,632 INFO L82 PathProgramCache]: Analyzing trace with hash 14408763, now seen corresponding path program 19 times [2020-10-13 10:17:11,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:11,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24876018] [2020-10-13 10:17:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:11,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:13,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:13,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 10:17:13,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:13,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1431 [2020-10-13 10:17:13,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:13,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:17:13,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:13,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-13 10:17:13,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:14,010 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:14,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:14,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:14,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:14,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:14,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:14,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:17:14,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:14,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:14,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:14,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:14,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:17:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:14,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24876018] [2020-10-13 10:17:14,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:14,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:17:14,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541135575] [2020-10-13 10:17:14,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:17:14,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:14,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:17:14,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:17:14,085 INFO L87 Difference]: Start difference. First operand 165 states and 204 transitions. Second operand 32 states. [2020-10-13 10:17:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:14,479 INFO L93 Difference]: Finished difference Result 182 states and 226 transitions. [2020-10-13 10:17:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:17:14,480 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 144 [2020-10-13 10:17:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:14,482 INFO L225 Difference]: With dead ends: 182 [2020-10-13 10:17:14,482 INFO L226 Difference]: Without dead ends: 175 [2020-10-13 10:17:14,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:17:14,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-13 10:17:14,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2020-10-13 10:17:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-13 10:17:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 212 transitions. [2020-10-13 10:17:14,493 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 212 transitions. Word has length 144 [2020-10-13 10:17:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:14,494 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 212 transitions. [2020-10-13 10:17:14,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:17:14,494 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 212 transitions. [2020-10-13 10:17:14,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 10:17:14,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:14,496 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:14,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:17:14,496 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:14,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1995828753, now seen corresponding path program 20 times [2020-10-13 10:17:14,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:14,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134285320] [2020-10-13 10:17:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:14,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:15,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:15,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 10:17:15,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:15,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1221 [2020-10-13 10:17:15,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:15,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:17:15,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:15,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-13 10:17:15,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:16,653 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:16,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:16,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:16,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:16,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:16,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:16,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:17:16,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:16,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:16,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:16,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:16,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:16,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134285320] [2020-10-13 10:17:16,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:16,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:17:16,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753475309] [2020-10-13 10:17:16,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:17:16,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:16,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:17:16,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:17:16,706 INFO L87 Difference]: Start difference. First operand 171 states and 212 transitions. Second operand 33 states. [2020-10-13 10:17:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:17,103 INFO L93 Difference]: Finished difference Result 188 states and 234 transitions. [2020-10-13 10:17:17,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:17:17,105 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 149 [2020-10-13 10:17:17,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:17,107 INFO L225 Difference]: With dead ends: 188 [2020-10-13 10:17:17,108 INFO L226 Difference]: Without dead ends: 181 [2020-10-13 10:17:17,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:17:17,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-13 10:17:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2020-10-13 10:17:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-13 10:17:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 220 transitions. [2020-10-13 10:17:17,117 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 220 transitions. Word has length 149 [2020-10-13 10:17:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:17,118 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 220 transitions. [2020-10-13 10:17:17,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:17:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 220 transitions. [2020-10-13 10:17:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-13 10:17:17,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:17,120 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:17,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:17:17,121 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:17,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:17,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1851962181, now seen corresponding path program 21 times [2020-10-13 10:17:17,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:17,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073828604] [2020-10-13 10:17:17,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:17,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:18,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:18,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 10:17:18,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:18,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1302 [2020-10-13 10:17:18,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:18,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:17:18,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:18,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-13 10:17:18,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:19,314 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:19,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:19,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:19,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:19,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:19,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:19,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:17:19,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:19,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:19,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:19,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:19,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:19,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073828604] [2020-10-13 10:17:19,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:19,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:17:19,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754096860] [2020-10-13 10:17:19,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:17:19,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:19,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:17:19,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:17:19,356 INFO L87 Difference]: Start difference. First operand 177 states and 220 transitions. Second operand 34 states. [2020-10-13 10:17:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:19,722 INFO L93 Difference]: Finished difference Result 194 states and 242 transitions. [2020-10-13 10:17:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:17:19,723 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 154 [2020-10-13 10:17:19,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:19,726 INFO L225 Difference]: With dead ends: 194 [2020-10-13 10:17:19,726 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 10:17:19,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:17:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 10:17:19,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2020-10-13 10:17:19,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-13 10:17:19,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 228 transitions. [2020-10-13 10:17:19,736 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 228 transitions. Word has length 154 [2020-10-13 10:17:19,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:19,737 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 228 transitions. [2020-10-13 10:17:19,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:17:19,737 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 228 transitions. [2020-10-13 10:17:19,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 10:17:19,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:19,738 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:19,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:17:19,739 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:19,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1109061999, now seen corresponding path program 22 times [2020-10-13 10:17:19,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:19,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19167051] [2020-10-13 10:17:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:19,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:21,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:21,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 10:17:21,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:21,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1425 [2020-10-13 10:17:21,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:21,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:17:21,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:21,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-13 10:17:21,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:22,032 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:22,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:22,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:22,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:22,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:22,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:22,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:17:22,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:22,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:22,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:22,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:22,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:22,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19167051] [2020-10-13 10:17:22,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:22,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:17:22,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966262697] [2020-10-13 10:17:22,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:17:22,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:22,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:17:22,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:17:22,069 INFO L87 Difference]: Start difference. First operand 183 states and 228 transitions. Second operand 35 states. [2020-10-13 10:17:22,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:22,422 INFO L93 Difference]: Finished difference Result 200 states and 250 transitions. [2020-10-13 10:17:22,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:17:22,422 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 159 [2020-10-13 10:17:22,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:22,425 INFO L225 Difference]: With dead ends: 200 [2020-10-13 10:17:22,425 INFO L226 Difference]: Without dead ends: 193 [2020-10-13 10:17:22,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:17:22,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-13 10:17:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2020-10-13 10:17:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-13 10:17:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 236 transitions. [2020-10-13 10:17:22,435 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 236 transitions. Word has length 159 [2020-10-13 10:17:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:22,436 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 236 transitions. [2020-10-13 10:17:22,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:17:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 236 transitions. [2020-10-13 10:17:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-13 10:17:22,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:22,438 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:22,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:17:22,438 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:22,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:22,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1705778491, now seen corresponding path program 23 times [2020-10-13 10:17:22,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:22,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661952523] [2020-10-13 10:17:22,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:22,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:24,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:24,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 10:17:24,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:24,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1555 [2020-10-13 10:17:24,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:24,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:17:24,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:24,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-13 10:17:24,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:24,915 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:24,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:24,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:24,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:24,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:24,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:24,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:17:24,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:24,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:24,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:24,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:24,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:24,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661952523] [2020-10-13 10:17:24,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:24,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:17:24,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784748600] [2020-10-13 10:17:24,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:17:24,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:24,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:17:24,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:17:24,953 INFO L87 Difference]: Start difference. First operand 189 states and 236 transitions. Second operand 36 states. [2020-10-13 10:17:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:25,323 INFO L93 Difference]: Finished difference Result 206 states and 258 transitions. [2020-10-13 10:17:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:17:25,323 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 164 [2020-10-13 10:17:25,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:25,325 INFO L225 Difference]: With dead ends: 206 [2020-10-13 10:17:25,325 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 10:17:25,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:17:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 10:17:25,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2020-10-13 10:17:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-13 10:17:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 244 transitions. [2020-10-13 10:17:25,338 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 244 transitions. Word has length 164 [2020-10-13 10:17:25,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:25,338 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 244 transitions. [2020-10-13 10:17:25,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:17:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 244 transitions. [2020-10-13 10:17:25,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-13 10:17:25,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:25,339 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:25,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:17:25,340 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:25,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1858440977, now seen corresponding path program 24 times [2020-10-13 10:17:25,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:25,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561623899] [2020-10-13 10:17:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:25,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:27,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:27,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 10:17:27,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:27,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1743 [2020-10-13 10:17:27,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:27,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:17:27,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:27,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-13 10:17:27,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:28,028 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:28,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:28,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:28,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:28,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:28,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:28,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:17:28,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:28,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:28,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:28,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:28,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:28,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561623899] [2020-10-13 10:17:28,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:28,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:17:28,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059899024] [2020-10-13 10:17:28,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:17:28,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:28,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:17:28,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:17:28,065 INFO L87 Difference]: Start difference. First operand 195 states and 244 transitions. Second operand 37 states. [2020-10-13 10:17:28,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:28,357 INFO L93 Difference]: Finished difference Result 212 states and 266 transitions. [2020-10-13 10:17:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:17:28,358 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 169 [2020-10-13 10:17:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:28,360 INFO L225 Difference]: With dead ends: 212 [2020-10-13 10:17:28,360 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 10:17:28,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:17:28,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 10:17:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2020-10-13 10:17:28,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-13 10:17:28,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 252 transitions. [2020-10-13 10:17:28,368 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 252 transitions. Word has length 169 [2020-10-13 10:17:28,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:28,369 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 252 transitions. [2020-10-13 10:17:28,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:17:28,369 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 252 transitions. [2020-10-13 10:17:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-13 10:17:28,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:28,370 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:28,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:17:28,370 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:28,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:28,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1137724859, now seen corresponding path program 25 times [2020-10-13 10:17:28,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:28,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847863009] [2020-10-13 10:17:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:28,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:29,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:29,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-13 10:17:29,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:29,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1277 [2020-10-13 10:17:29,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:29,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:17:29,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:29,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-13 10:17:29,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:30,592 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:30,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:30,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:30,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:30,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:30,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:30,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:17:30,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:30,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:30,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:30,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:30,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:30,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847863009] [2020-10-13 10:17:30,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:30,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:17:30,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772567003] [2020-10-13 10:17:30,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:17:30,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:30,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:17:30,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:17:30,652 INFO L87 Difference]: Start difference. First operand 201 states and 252 transitions. Second operand 38 states. [2020-10-13 10:17:30,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:30,984 INFO L93 Difference]: Finished difference Result 218 states and 274 transitions. [2020-10-13 10:17:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:17:30,985 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 174 [2020-10-13 10:17:30,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:30,987 INFO L225 Difference]: With dead ends: 218 [2020-10-13 10:17:30,987 INFO L226 Difference]: Without dead ends: 211 [2020-10-13 10:17:30,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:17:30,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-13 10:17:30,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2020-10-13 10:17:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-13 10:17:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 260 transitions. [2020-10-13 10:17:30,996 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 260 transitions. Word has length 174 [2020-10-13 10:17:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:30,997 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 260 transitions. [2020-10-13 10:17:30,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:17:30,997 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 260 transitions. [2020-10-13 10:17:30,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-13 10:17:30,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:30,998 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:30,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:17:30,998 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:30,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:30,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1398763409, now seen corresponding path program 26 times [2020-10-13 10:17:30,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:30,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924369441] [2020-10-13 10:17:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:31,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:32,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:32,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-13 10:17:32,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:32,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1321 [2020-10-13 10:17:32,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:32,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:17:32,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:32,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-13 10:17:32,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:33,303 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:33,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:33,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:33,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:33,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:33,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:33,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:17:33,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:33,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:33,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:33,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:33,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:33,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924369441] [2020-10-13 10:17:33,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:33,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:17:33,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068110916] [2020-10-13 10:17:33,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:17:33,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:33,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:17:33,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:17:33,342 INFO L87 Difference]: Start difference. First operand 207 states and 260 transitions. Second operand 39 states. [2020-10-13 10:17:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:33,686 INFO L93 Difference]: Finished difference Result 224 states and 282 transitions. [2020-10-13 10:17:33,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:17:33,687 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 179 [2020-10-13 10:17:33,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:33,689 INFO L225 Difference]: With dead ends: 224 [2020-10-13 10:17:33,690 INFO L226 Difference]: Without dead ends: 217 [2020-10-13 10:17:33,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:17:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-13 10:17:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 213. [2020-10-13 10:17:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-13 10:17:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 268 transitions. [2020-10-13 10:17:33,698 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 268 transitions. Word has length 179 [2020-10-13 10:17:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:33,699 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 268 transitions. [2020-10-13 10:17:33,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:17:33,699 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 268 transitions. [2020-10-13 10:17:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-13 10:17:33,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:33,700 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:33,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:17:33,701 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:33,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:33,701 INFO L82 PathProgramCache]: Analyzing trace with hash 416407099, now seen corresponding path program 27 times [2020-10-13 10:17:33,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:33,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123846102] [2020-10-13 10:17:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:33,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:35,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:35,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-13 10:17:35,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:35,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1365 [2020-10-13 10:17:35,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:35,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:17:35,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:35,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-10-13 10:17:35,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:36,110 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:36,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:36,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:36,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:36,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:36,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:36,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:17:36,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:36,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:36,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:36,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:36,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:36,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123846102] [2020-10-13 10:17:36,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:36,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 10:17:36,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064676496] [2020-10-13 10:17:36,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 10:17:36,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:36,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 10:17:36,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:17:36,151 INFO L87 Difference]: Start difference. First operand 213 states and 268 transitions. Second operand 40 states. [2020-10-13 10:17:36,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:36,501 INFO L93 Difference]: Finished difference Result 230 states and 290 transitions. [2020-10-13 10:17:36,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:17:36,501 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 184 [2020-10-13 10:17:36,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:36,504 INFO L225 Difference]: With dead ends: 230 [2020-10-13 10:17:36,504 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 10:17:36,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:17:36,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 10:17:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2020-10-13 10:17:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-13 10:17:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 276 transitions. [2020-10-13 10:17:36,512 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 276 transitions. Word has length 184 [2020-10-13 10:17:36,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:36,513 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 276 transitions. [2020-10-13 10:17:36,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 10:17:36,513 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 276 transitions. [2020-10-13 10:17:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-13 10:17:36,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:36,514 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:36,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:17:36,514 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:36,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1686458351, now seen corresponding path program 28 times [2020-10-13 10:17:36,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:36,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393996346] [2020-10-13 10:17:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:36,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:38,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:38,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-13 10:17:38,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:38,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1541 [2020-10-13 10:17:38,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:38,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 10:17:38,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:38,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-13 10:17:38,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:39,161 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:39,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:39,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:39,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:39,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:39,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:39,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:17:39,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:39,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:39,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:39,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:39,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:39,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393996346] [2020-10-13 10:17:39,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:39,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 10:17:39,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122644947] [2020-10-13 10:17:39,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 10:17:39,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:39,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 10:17:39,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:17:39,203 INFO L87 Difference]: Start difference. First operand 219 states and 276 transitions. Second operand 41 states. [2020-10-13 10:17:39,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:39,568 INFO L93 Difference]: Finished difference Result 236 states and 298 transitions. [2020-10-13 10:17:39,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:17:39,568 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 189 [2020-10-13 10:17:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:39,571 INFO L225 Difference]: With dead ends: 236 [2020-10-13 10:17:39,571 INFO L226 Difference]: Without dead ends: 229 [2020-10-13 10:17:39,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:17:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-13 10:17:39,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2020-10-13 10:17:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-13 10:17:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 284 transitions. [2020-10-13 10:17:39,581 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 284 transitions. Word has length 189 [2020-10-13 10:17:39,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:39,581 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 284 transitions. [2020-10-13 10:17:39,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 10:17:39,581 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 284 transitions. [2020-10-13 10:17:39,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-13 10:17:39,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:39,583 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:39,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:17:39,583 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:39,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2004405947, now seen corresponding path program 29 times [2020-10-13 10:17:39,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:39,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831815971] [2020-10-13 10:17:39,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:39,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:41,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:41,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-13 10:17:41,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:41,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1566 [2020-10-13 10:17:41,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:41,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 10:17:41,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:41,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-13 10:17:41,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:42,258 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:42,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:42,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:42,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:42,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:42,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:42,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:17:42,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:42,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:42,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:42,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:42,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:42,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831815971] [2020-10-13 10:17:42,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:42,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 10:17:42,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345956962] [2020-10-13 10:17:42,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 10:17:42,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:42,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 10:17:42,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:17:42,300 INFO L87 Difference]: Start difference. First operand 225 states and 284 transitions. Second operand 42 states. [2020-10-13 10:17:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:42,649 INFO L93 Difference]: Finished difference Result 242 states and 306 transitions. [2020-10-13 10:17:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 10:17:42,650 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 194 [2020-10-13 10:17:42,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:42,652 INFO L225 Difference]: With dead ends: 242 [2020-10-13 10:17:42,652 INFO L226 Difference]: Without dead ends: 235 [2020-10-13 10:17:42,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:17:42,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-13 10:17:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 231. [2020-10-13 10:17:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-13 10:17:42,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 292 transitions. [2020-10-13 10:17:42,661 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 292 transitions. Word has length 194 [2020-10-13 10:17:42,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:42,661 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 292 transitions. [2020-10-13 10:17:42,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 10:17:42,662 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 292 transitions. [2020-10-13 10:17:42,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-13 10:17:42,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:42,663 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:42,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:17:42,663 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:42,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1558139025, now seen corresponding path program 30 times [2020-10-13 10:17:42,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:42,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542920996] [2020-10-13 10:17:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:42,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:44,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:44,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-13 10:17:44,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:44,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1633 [2020-10-13 10:17:44,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:44,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 10:17:44,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:44,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-13 10:17:44,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:45,463 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:45,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:45,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:45,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:45,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:45,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:45,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:17:45,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:45,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:45,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:45,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:45,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:45,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542920996] [2020-10-13 10:17:45,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:45,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 10:17:45,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776703588] [2020-10-13 10:17:45,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 10:17:45,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:45,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 10:17:45,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:17:45,508 INFO L87 Difference]: Start difference. First operand 231 states and 292 transitions. Second operand 43 states. [2020-10-13 10:17:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:45,921 INFO L93 Difference]: Finished difference Result 248 states and 314 transitions. [2020-10-13 10:17:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 10:17:45,921 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 199 [2020-10-13 10:17:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:45,923 INFO L225 Difference]: With dead ends: 248 [2020-10-13 10:17:45,923 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 10:17:45,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:17:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 10:17:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2020-10-13 10:17:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-13 10:17:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 300 transitions. [2020-10-13 10:17:45,937 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 300 transitions. Word has length 199 [2020-10-13 10:17:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:45,937 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 300 transitions. [2020-10-13 10:17:45,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 10:17:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 300 transitions. [2020-10-13 10:17:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-13 10:17:45,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:45,939 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:45,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:17:45,940 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:45,940 INFO L82 PathProgramCache]: Analyzing trace with hash 411901755, now seen corresponding path program 31 times [2020-10-13 10:17:45,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:45,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995217032] [2020-10-13 10:17:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:46,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:47,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:47,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-13 10:17:47,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:47,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1738 [2020-10-13 10:17:47,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 10:17:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 194 [2020-10-13 10:17:47,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:48,904 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:48,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:48,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:48,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:48,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:48,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:48,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:17:48,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:48,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:48,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:48,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:48,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:48,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995217032] [2020-10-13 10:17:48,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:48,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 10:17:48,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831152845] [2020-10-13 10:17:48,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 10:17:48,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:48,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 10:17:48,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:17:48,948 INFO L87 Difference]: Start difference. First operand 237 states and 300 transitions. Second operand 44 states. [2020-10-13 10:17:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:49,351 INFO L93 Difference]: Finished difference Result 254 states and 322 transitions. [2020-10-13 10:17:49,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 10:17:49,352 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 204 [2020-10-13 10:17:49,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:49,354 INFO L225 Difference]: With dead ends: 254 [2020-10-13 10:17:49,354 INFO L226 Difference]: Without dead ends: 247 [2020-10-13 10:17:49,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:17:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-13 10:17:49,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2020-10-13 10:17:49,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-13 10:17:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 308 transitions. [2020-10-13 10:17:49,365 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 308 transitions. Word has length 204 [2020-10-13 10:17:49,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:49,366 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 308 transitions. [2020-10-13 10:17:49,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 10:17:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 308 transitions. [2020-10-13 10:17:49,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 10:17:49,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:49,367 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:49,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:17:49,368 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:49,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:49,368 INFO L82 PathProgramCache]: Analyzing trace with hash -324358417, now seen corresponding path program 32 times [2020-10-13 10:17:49,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:49,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46153082] [2020-10-13 10:17:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:49,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:51,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:51,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-13 10:17:51,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:51,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1882 [2020-10-13 10:17:51,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:51,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 10:17:51,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:51,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-10-13 10:17:51,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:52,557 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:52,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:52,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:52,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:52,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:52,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:52,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:17:52,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:52,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:52,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:52,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:52,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:52,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46153082] [2020-10-13 10:17:52,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:52,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 10:17:52,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107544400] [2020-10-13 10:17:52,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 10:17:52,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:52,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 10:17:52,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:17:52,632 INFO L87 Difference]: Start difference. First operand 243 states and 308 transitions. Second operand 45 states. [2020-10-13 10:17:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:53,009 INFO L93 Difference]: Finished difference Result 260 states and 330 transitions. [2020-10-13 10:17:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 10:17:53,010 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 209 [2020-10-13 10:17:53,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:53,012 INFO L225 Difference]: With dead ends: 260 [2020-10-13 10:17:53,012 INFO L226 Difference]: Without dead ends: 253 [2020-10-13 10:17:53,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:17:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-13 10:17:53,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2020-10-13 10:17:53,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-13 10:17:53,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 316 transitions. [2020-10-13 10:17:53,021 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 316 transitions. Word has length 209 [2020-10-13 10:17:53,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:53,021 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 316 transitions. [2020-10-13 10:17:53,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 10:17:53,022 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 316 transitions. [2020-10-13 10:17:53,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-13 10:17:53,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:53,023 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:53,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:17:53,024 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:53,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:53,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1524027323, now seen corresponding path program 33 times [2020-10-13 10:17:53,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:53,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918925309] [2020-10-13 10:17:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:53,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:54,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:54,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-13 10:17:54,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:54,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1791 [2020-10-13 10:17:54,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:54,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 10:17:54,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:54,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-13 10:17:54,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:56,158 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:56,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:56,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:56,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:56,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:56,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:56,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:17:56,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:56,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:56,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:56,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:56,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:56,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918925309] [2020-10-13 10:17:56,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:56,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 10:17:56,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094202514] [2020-10-13 10:17:56,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 10:17:56,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:56,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 10:17:56,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:17:56,206 INFO L87 Difference]: Start difference. First operand 249 states and 316 transitions. Second operand 46 states. [2020-10-13 10:17:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:56,620 INFO L93 Difference]: Finished difference Result 266 states and 338 transitions. [2020-10-13 10:17:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 10:17:56,621 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 214 [2020-10-13 10:17:56,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:56,623 INFO L225 Difference]: With dead ends: 266 [2020-10-13 10:17:56,623 INFO L226 Difference]: Without dead ends: 259 [2020-10-13 10:17:56,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:17:56,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-13 10:17:56,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2020-10-13 10:17:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-13 10:17:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 324 transitions. [2020-10-13 10:17:56,632 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 324 transitions. Word has length 214 [2020-10-13 10:17:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:56,632 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 324 transitions. [2020-10-13 10:17:56,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 10:17:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 324 transitions. [2020-10-13 10:17:56,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-13 10:17:56,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:56,634 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:56,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:17:56,634 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:56,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:56,635 INFO L82 PathProgramCache]: Analyzing trace with hash -547664273, now seen corresponding path program 34 times [2020-10-13 10:17:56,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:56,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982273075] [2020-10-13 10:17:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:56,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:58,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:58,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-13 10:17:58,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:58,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1837 [2020-10-13 10:17:58,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:58,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 10:17:58,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:17:58,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-13 10:17:58,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:59,841 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:17:59,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:59,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:59,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:59,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:59,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:59,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:17:59,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:59,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:59,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:59,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:59,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:59,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982273075] [2020-10-13 10:17:59,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:59,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 10:17:59,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655332377] [2020-10-13 10:17:59,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 10:17:59,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:59,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 10:17:59,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:17:59,889 INFO L87 Difference]: Start difference. First operand 255 states and 324 transitions. Second operand 47 states. [2020-10-13 10:18:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:00,283 INFO L93 Difference]: Finished difference Result 272 states and 346 transitions. [2020-10-13 10:18:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 10:18:00,288 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 219 [2020-10-13 10:18:00,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:00,290 INFO L225 Difference]: With dead ends: 272 [2020-10-13 10:18:00,290 INFO L226 Difference]: Without dead ends: 265 [2020-10-13 10:18:00,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 10:18:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-13 10:18:00,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 261. [2020-10-13 10:18:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-13 10:18:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 332 transitions. [2020-10-13 10:18:00,299 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 332 transitions. Word has length 219 [2020-10-13 10:18:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:00,300 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 332 transitions. [2020-10-13 10:18:00,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 10:18:00,300 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 332 transitions. [2020-10-13 10:18:00,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-13 10:18:00,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:00,301 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:00,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:18:00,302 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:00,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1021452229, now seen corresponding path program 35 times [2020-10-13 10:18:00,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:00,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394437616] [2020-10-13 10:18:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:00,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:02,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:02,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-13 10:18:02,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:02,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2026 [2020-10-13 10:18:02,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:02,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 10:18:02,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:02,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-13 10:18:02,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:03,758 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:18:03,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:03,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:03,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:03,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:03,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:03,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:18:03,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:03,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:03,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394437616] [2020-10-13 10:18:03,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:03,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 10:18:03,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127830535] [2020-10-13 10:18:03,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 10:18:03,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:03,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 10:18:03,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:18:03,810 INFO L87 Difference]: Start difference. First operand 261 states and 332 transitions. Second operand 48 states. [2020-10-13 10:18:04,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:04,200 INFO L93 Difference]: Finished difference Result 278 states and 354 transitions. [2020-10-13 10:18:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 10:18:04,200 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 224 [2020-10-13 10:18:04,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:04,203 INFO L225 Difference]: With dead ends: 278 [2020-10-13 10:18:04,203 INFO L226 Difference]: Without dead ends: 271 [2020-10-13 10:18:04,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 10:18:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-13 10:18:04,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 267. [2020-10-13 10:18:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-13 10:18:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 340 transitions. [2020-10-13 10:18:04,211 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 340 transitions. Word has length 224 [2020-10-13 10:18:04,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:04,212 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 340 transitions. [2020-10-13 10:18:04,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 10:18:04,212 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 340 transitions. [2020-10-13 10:18:04,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-13 10:18:04,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:04,214 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:04,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:18:04,214 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:04,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:04,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1284862481, now seen corresponding path program 36 times [2020-10-13 10:18:04,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:04,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673004298] [2020-10-13 10:18:04,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:04,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:06,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:06,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 10:18:06,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:06,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2183 [2020-10-13 10:18:06,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:06,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 10:18:06,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:06,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 219 [2020-10-13 10:18:06,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:07,905 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:18:07,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:07,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:07,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:07,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:07,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:07,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:18:07,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:07,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:07,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:07,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:07,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:07,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673004298] [2020-10-13 10:18:07,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:07,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 10:18:07,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044635613] [2020-10-13 10:18:07,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 10:18:07,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:07,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 10:18:07,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:18:07,956 INFO L87 Difference]: Start difference. First operand 267 states and 340 transitions. Second operand 49 states. [2020-10-13 10:18:08,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:08,396 INFO L93 Difference]: Finished difference Result 284 states and 362 transitions. [2020-10-13 10:18:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 10:18:08,397 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 229 [2020-10-13 10:18:08,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:08,399 INFO L225 Difference]: With dead ends: 284 [2020-10-13 10:18:08,399 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 10:18:08,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 10:18:08,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 10:18:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 273. [2020-10-13 10:18:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-13 10:18:08,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 348 transitions. [2020-10-13 10:18:08,407 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 348 transitions. Word has length 229 [2020-10-13 10:18:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:08,408 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 348 transitions. [2020-10-13 10:18:08,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 10:18:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 348 transitions. [2020-10-13 10:18:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-13 10:18:08,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:08,410 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:08,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:18:08,410 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:08,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:08,410 INFO L82 PathProgramCache]: Analyzing trace with hash 2083147963, now seen corresponding path program 37 times [2020-10-13 10:18:08,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:08,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526930687] [2020-10-13 10:18:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:08,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:10,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:10,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-13 10:18:10,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:10,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2219 [2020-10-13 10:18:10,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:10,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 10:18:10,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:10,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-13 10:18:10,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:12,172 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:18:12,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:12,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:12,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:12,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:12,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:12,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:18:12,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:12,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:12,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:12,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:12,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:12,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526930687] [2020-10-13 10:18:12,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:12,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 10:18:12,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330988797] [2020-10-13 10:18:12,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 10:18:12,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:12,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 10:18:12,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:18:12,226 INFO L87 Difference]: Start difference. First operand 273 states and 348 transitions. Second operand 50 states. [2020-10-13 10:18:12,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:12,631 INFO L93 Difference]: Finished difference Result 290 states and 370 transitions. [2020-10-13 10:18:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 10:18:12,631 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 234 [2020-10-13 10:18:12,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:12,633 INFO L225 Difference]: With dead ends: 290 [2020-10-13 10:18:12,633 INFO L226 Difference]: Without dead ends: 283 [2020-10-13 10:18:12,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:18:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-13 10:18:12,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2020-10-13 10:18:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-13 10:18:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 356 transitions. [2020-10-13 10:18:12,642 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 356 transitions. Word has length 234 [2020-10-13 10:18:12,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:12,642 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 356 transitions. [2020-10-13 10:18:12,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 10:18:12,642 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 356 transitions. [2020-10-13 10:18:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-13 10:18:12,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:12,644 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:12,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:18:12,645 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:12,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1156551313, now seen corresponding path program 38 times [2020-10-13 10:18:12,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:12,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888551990] [2020-10-13 10:18:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:12,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:15,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:15,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-13 10:18:15,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:15,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2327 [2020-10-13 10:18:15,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:15,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 10:18:15,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:15,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 229 [2020-10-13 10:18:15,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:16,571 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:18:16,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:16,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:16,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:16,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:16,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:16,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:18:16,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:16,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:16,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:16,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:16,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:16,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888551990] [2020-10-13 10:18:16,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:16,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 10:18:16,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297391296] [2020-10-13 10:18:16,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 10:18:16,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:16,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 10:18:16,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:18:16,626 INFO L87 Difference]: Start difference. First operand 279 states and 356 transitions. Second operand 51 states. [2020-10-13 10:18:17,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:17,115 INFO L93 Difference]: Finished difference Result 296 states and 378 transitions. [2020-10-13 10:18:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 10:18:17,115 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 239 [2020-10-13 10:18:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:17,118 INFO L225 Difference]: With dead ends: 296 [2020-10-13 10:18:17,118 INFO L226 Difference]: Without dead ends: 289 [2020-10-13 10:18:17,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:18:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-13 10:18:17,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 285. [2020-10-13 10:18:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-13 10:18:17,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 364 transitions. [2020-10-13 10:18:17,126 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 364 transitions. Word has length 239 [2020-10-13 10:18:17,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:17,127 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 364 transitions. [2020-10-13 10:18:17,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 10:18:17,127 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 364 transitions. [2020-10-13 10:18:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-13 10:18:17,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:17,128 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:17,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:18:17,129 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:17,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:17,129 INFO L82 PathProgramCache]: Analyzing trace with hash -691789509, now seen corresponding path program 39 times [2020-10-13 10:18:17,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:17,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546295961] [2020-10-13 10:18:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:17,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:19,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:19,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-13 10:18:19,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:19,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2272 [2020-10-13 10:18:19,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:19,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 10:18:19,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:19,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 234 [2020-10-13 10:18:19,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:21,115 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:18:21,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:21,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:21,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:21,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:21,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:21,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:18:21,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:21,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:21,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:21,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:21,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:21,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546295961] [2020-10-13 10:18:21,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:21,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 10:18:21,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14534384] [2020-10-13 10:18:21,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 10:18:21,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:21,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 10:18:21,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:18:21,174 INFO L87 Difference]: Start difference. First operand 285 states and 364 transitions. Second operand 52 states. [2020-10-13 10:18:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:21,634 INFO L93 Difference]: Finished difference Result 302 states and 386 transitions. [2020-10-13 10:18:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 10:18:21,635 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 244 [2020-10-13 10:18:21,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:21,637 INFO L225 Difference]: With dead ends: 302 [2020-10-13 10:18:21,637 INFO L226 Difference]: Without dead ends: 295 [2020-10-13 10:18:21,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 10:18:21,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-13 10:18:21,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 291. [2020-10-13 10:18:21,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-13 10:18:21,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 372 transitions. [2020-10-13 10:18:21,651 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 372 transitions. Word has length 244 [2020-10-13 10:18:21,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:21,652 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 372 transitions. [2020-10-13 10:18:21,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 10:18:21,652 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 372 transitions. [2020-10-13 10:18:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-13 10:18:21,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:21,654 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:21,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:18:21,654 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:21,655 INFO L82 PathProgramCache]: Analyzing trace with hash -494605073, now seen corresponding path program 40 times [2020-10-13 10:18:21,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:21,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816340349] [2020-10-13 10:18:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:21,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:24,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:24,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-13 10:18:24,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:24,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2382 [2020-10-13 10:18:24,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:24,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 10:18:24,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:24,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 239 [2020-10-13 10:18:24,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:25,716 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:18:25,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:25,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:25,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:25,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:25,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:25,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:18:25,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:25,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:25,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:25,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:25,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:25,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816340349] [2020-10-13 10:18:25,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:25,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 10:18:25,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787412927] [2020-10-13 10:18:25,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 10:18:25,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:25,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 10:18:25,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:18:25,777 INFO L87 Difference]: Start difference. First operand 291 states and 372 transitions. Second operand 53 states. [2020-10-13 10:18:26,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:26,257 INFO L93 Difference]: Finished difference Result 308 states and 394 transitions. [2020-10-13 10:18:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 10:18:26,258 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 249 [2020-10-13 10:18:26,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:26,261 INFO L225 Difference]: With dead ends: 308 [2020-10-13 10:18:26,261 INFO L226 Difference]: Without dead ends: 301 [2020-10-13 10:18:26,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 10:18:26,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-13 10:18:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 297. [2020-10-13 10:18:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-13 10:18:26,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 380 transitions. [2020-10-13 10:18:26,269 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 380 transitions. Word has length 249 [2020-10-13 10:18:26,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:26,270 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 380 transitions. [2020-10-13 10:18:26,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 10:18:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 380 transitions. [2020-10-13 10:18:26,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-13 10:18:26,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:26,272 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:26,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:18:26,272 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:26,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:26,272 INFO L82 PathProgramCache]: Analyzing trace with hash -910995013, now seen corresponding path program 41 times [2020-10-13 10:18:26,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:26,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845412111] [2020-10-13 10:18:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:26,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:29,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:29,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-13 10:18:29,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:29,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2662 [2020-10-13 10:18:29,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:29,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 10:18:29,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:29,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 244 [2020-10-13 10:18:29,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:30,752 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:18:30,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:30,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:30,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:30,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:30,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:30,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:18:30,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:30,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:30,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:30,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:30,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:30,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845412111] [2020-10-13 10:18:30,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:30,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-13 10:18:30,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048180740] [2020-10-13 10:18:30,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-13 10:18:30,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:30,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-13 10:18:30,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:18:30,808 INFO L87 Difference]: Start difference. First operand 297 states and 380 transitions. Second operand 54 states. [2020-10-13 10:18:31,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:31,249 INFO L93 Difference]: Finished difference Result 314 states and 402 transitions. [2020-10-13 10:18:31,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 10:18:31,250 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 254 [2020-10-13 10:18:31,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:31,253 INFO L225 Difference]: With dead ends: 314 [2020-10-13 10:18:31,253 INFO L226 Difference]: Without dead ends: 307 [2020-10-13 10:18:31,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 10:18:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-13 10:18:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 303. [2020-10-13 10:18:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-13 10:18:31,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 388 transitions. [2020-10-13 10:18:31,261 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 388 transitions. Word has length 254 [2020-10-13 10:18:31,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:31,262 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 388 transitions. [2020-10-13 10:18:31,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-13 10:18:31,262 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 388 transitions. [2020-10-13 10:18:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-13 10:18:31,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:31,264 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:31,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:18:31,264 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:31,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:31,264 INFO L82 PathProgramCache]: Analyzing trace with hash 805309551, now seen corresponding path program 42 times [2020-10-13 10:18:31,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:31,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558484131] [2020-10-13 10:18:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:31,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:34,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:34,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-13 10:18:34,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:34,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2721 [2020-10-13 10:18:34,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:34,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 10:18:34,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:34,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 249 [2020-10-13 10:18:34,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:35,820 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:18:35,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:35,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:35,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:35,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:35,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:35,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:18:35,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:35,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:35,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:35,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:35,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:35,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558484131] [2020-10-13 10:18:35,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:35,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-13 10:18:35,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331186815] [2020-10-13 10:18:35,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-13 10:18:35,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:35,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-13 10:18:35,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:18:35,879 INFO L87 Difference]: Start difference. First operand 303 states and 388 transitions. Second operand 55 states. [2020-10-13 10:18:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:36,336 INFO L93 Difference]: Finished difference Result 320 states and 410 transitions. [2020-10-13 10:18:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 10:18:36,337 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 259 [2020-10-13 10:18:36,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:36,340 INFO L225 Difference]: With dead ends: 320 [2020-10-13 10:18:36,340 INFO L226 Difference]: Without dead ends: 313 [2020-10-13 10:18:36,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 10:18:36,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-13 10:18:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2020-10-13 10:18:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-13 10:18:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 396 transitions. [2020-10-13 10:18:36,352 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 396 transitions. Word has length 259 [2020-10-13 10:18:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:36,353 INFO L479 AbstractCegarLoop]: Abstraction has 309 states and 396 transitions. [2020-10-13 10:18:36,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-13 10:18:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 396 transitions. [2020-10-13 10:18:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-13 10:18:36,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:36,355 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:36,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:18:36,355 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:36,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:36,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1908400699, now seen corresponding path program 43 times [2020-10-13 10:18:36,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:36,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368617541] [2020-10-13 10:18:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:36,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:39,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:39,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-13 10:18:39,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:39,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2796 [2020-10-13 10:18:39,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:39,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 10:18:39,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:39,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 254 [2020-10-13 10:18:39,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:41,094 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:18:41,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:41,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:41,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:41,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:41,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:41,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:18:41,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:41,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:41,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:41,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:41,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:41,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368617541] [2020-10-13 10:18:41,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:41,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-13 10:18:41,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295057030] [2020-10-13 10:18:41,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-13 10:18:41,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:41,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-13 10:18:41,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 10:18:41,155 INFO L87 Difference]: Start difference. First operand 309 states and 396 transitions. Second operand 56 states. [2020-10-13 10:18:41,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:41,621 INFO L93 Difference]: Finished difference Result 326 states and 418 transitions. [2020-10-13 10:18:41,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 10:18:41,621 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 264 [2020-10-13 10:18:41,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:41,624 INFO L225 Difference]: With dead ends: 326 [2020-10-13 10:18:41,624 INFO L226 Difference]: Without dead ends: 319 [2020-10-13 10:18:41,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 10:18:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-13 10:18:41,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 315. [2020-10-13 10:18:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-13 10:18:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 404 transitions. [2020-10-13 10:18:41,632 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 404 transitions. Word has length 264 [2020-10-13 10:18:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:41,633 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 404 transitions. [2020-10-13 10:18:41,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-13 10:18:41,633 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 404 transitions. [2020-10-13 10:18:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-13 10:18:41,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:41,635 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:41,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:18:41,635 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:41,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1136249839, now seen corresponding path program 44 times [2020-10-13 10:18:41,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:41,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080729155] [2020-10-13 10:18:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:41,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:44,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:44,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-13 10:18:44,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:44,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2836 [2020-10-13 10:18:44,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:44,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 10:18:44,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:44,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 259 [2020-10-13 10:18:44,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:46,416 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:18:46,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:46,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:46,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:46,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:46,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:46,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:18:46,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:46,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:46,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:46,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:46,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:46,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080729155] [2020-10-13 10:18:46,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:46,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-13 10:18:46,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465690144] [2020-10-13 10:18:46,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-13 10:18:46,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:46,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-13 10:18:46,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:18:46,478 INFO L87 Difference]: Start difference. First operand 315 states and 404 transitions. Second operand 57 states. [2020-10-13 10:18:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:46,979 INFO L93 Difference]: Finished difference Result 332 states and 426 transitions. [2020-10-13 10:18:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 10:18:46,980 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 269 [2020-10-13 10:18:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:46,982 INFO L225 Difference]: With dead ends: 332 [2020-10-13 10:18:46,982 INFO L226 Difference]: Without dead ends: 325 [2020-10-13 10:18:46,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 10:18:46,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-13 10:18:46,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2020-10-13 10:18:46,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-13 10:18:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 412 transitions. [2020-10-13 10:18:46,989 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 412 transitions. Word has length 269 [2020-10-13 10:18:46,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:46,990 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 412 transitions. [2020-10-13 10:18:46,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-13 10:18:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 412 transitions. [2020-10-13 10:18:46,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-13 10:18:46,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:46,992 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:46,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:18:46,992 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:46,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:46,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1850617157, now seen corresponding path program 45 times [2020-10-13 10:18:46,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:46,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917796342] [2020-10-13 10:18:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:47,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:50,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:50,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-13 10:18:50,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:50,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2998 [2020-10-13 10:18:50,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:50,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 10:18:50,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:50,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 264 [2020-10-13 10:18:50,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:52,021 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:18:52,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:52,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:52,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:52,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:52,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:52,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:18:52,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:52,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:52,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:52,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:52,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:52,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917796342] [2020-10-13 10:18:52,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:52,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 10:18:52,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289777153] [2020-10-13 10:18:52,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 10:18:52,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:52,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 10:18:52,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:18:52,087 INFO L87 Difference]: Start difference. First operand 321 states and 412 transitions. Second operand 58 states. [2020-10-13 10:18:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:52,593 INFO L93 Difference]: Finished difference Result 338 states and 434 transitions. [2020-10-13 10:18:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 10:18:52,594 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 274 [2020-10-13 10:18:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:52,597 INFO L225 Difference]: With dead ends: 338 [2020-10-13 10:18:52,597 INFO L226 Difference]: Without dead ends: 331 [2020-10-13 10:18:52,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 10:18:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-13 10:18:52,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 327. [2020-10-13 10:18:52,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-13 10:18:52,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 420 transitions. [2020-10-13 10:18:52,604 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 420 transitions. Word has length 274 [2020-10-13 10:18:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:52,605 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 420 transitions. [2020-10-13 10:18:52,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 10:18:52,605 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 420 transitions. [2020-10-13 10:18:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-13 10:18:52,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:52,607 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:52,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:18:52,607 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash -672519313, now seen corresponding path program 46 times [2020-10-13 10:18:52,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:52,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437026159] [2020-10-13 10:18:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:52,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:55,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:55,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-13 10:18:55,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:55,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3063 [2020-10-13 10:18:55,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:55,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-13 10:18:55,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:18:55,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-13 10:18:55,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:57,779 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:18:57,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:18:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:57,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:18:57,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:18:57,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:18:57,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:18:57,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:18:57,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:18:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:18:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:18:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:18:57,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:18:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:18:57,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437026159] [2020-10-13 10:18:57,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:18:57,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-13 10:18:57,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200916773] [2020-10-13 10:18:57,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-13 10:18:57,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:18:57,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-13 10:18:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:18:57,848 INFO L87 Difference]: Start difference. First operand 327 states and 420 transitions. Second operand 59 states. [2020-10-13 10:18:58,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:18:58,362 INFO L93 Difference]: Finished difference Result 344 states and 442 transitions. [2020-10-13 10:18:58,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 10:18:58,363 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 279 [2020-10-13 10:18:58,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:18:58,366 INFO L225 Difference]: With dead ends: 344 [2020-10-13 10:18:58,366 INFO L226 Difference]: Without dead ends: 337 [2020-10-13 10:18:58,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 10:18:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-13 10:18:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 333. [2020-10-13 10:18:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-13 10:18:58,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 428 transitions. [2020-10-13 10:18:58,374 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 428 transitions. Word has length 279 [2020-10-13 10:18:58,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:18:58,374 INFO L479 AbstractCegarLoop]: Abstraction has 333 states and 428 transitions. [2020-10-13 10:18:58,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-13 10:18:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 428 transitions. [2020-10-13 10:18:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-10-13 10:18:58,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:18:58,376 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:18:58,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:18:58,377 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:18:58,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:18:58,377 INFO L82 PathProgramCache]: Analyzing trace with hash 307307323, now seen corresponding path program 47 times [2020-10-13 10:18:58,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:18:58,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551490080] [2020-10-13 10:18:58,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:18:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:18:58,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:01,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:01,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 290 [2020-10-13 10:19:01,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:01,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3295 [2020-10-13 10:19:01,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:01,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-13 10:19:01,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:19:01,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 274 [2020-10-13 10:19:01,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:03,916 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:19:03,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:19:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:03,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:03,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:03,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:19:03,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:03,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:19:03,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:03,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:03,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:19:03,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:03,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:19:03,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551490080] [2020-10-13 10:19:03,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:19:03,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-13 10:19:03,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053322977] [2020-10-13 10:19:03,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-13 10:19:03,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:19:03,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-13 10:19:03,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 10:19:03,984 INFO L87 Difference]: Start difference. First operand 333 states and 428 transitions. Second operand 60 states. [2020-10-13 10:19:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:19:04,478 INFO L93 Difference]: Finished difference Result 350 states and 450 transitions. [2020-10-13 10:19:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 10:19:04,479 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 284 [2020-10-13 10:19:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:19:04,481 INFO L225 Difference]: With dead ends: 350 [2020-10-13 10:19:04,482 INFO L226 Difference]: Without dead ends: 343 [2020-10-13 10:19:04,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 10:19:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-13 10:19:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 339. [2020-10-13 10:19:04,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-13 10:19:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 436 transitions. [2020-10-13 10:19:04,490 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 436 transitions. Word has length 284 [2020-10-13 10:19:04,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:19:04,491 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 436 transitions. [2020-10-13 10:19:04,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-13 10:19:04,491 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 436 transitions. [2020-10-13 10:19:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-13 10:19:04,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:04,493 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:04,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:19:04,493 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:04,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1086925551, now seen corresponding path program 48 times [2020-10-13 10:19:04,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:04,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198410500] [2020-10-13 10:19:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:04,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:07,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:07,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-13 10:19:07,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:07,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3257 [2020-10-13 10:19:07,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:07,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 10:19:07,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:19:07,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 279 [2020-10-13 10:19:07,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:10,024 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:19:10,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:19:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:10,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:10,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:10,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:19:10,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:10,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:19:10,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:10,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:10,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:19:10,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:10,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:19:10,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198410500] [2020-10-13 10:19:10,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:19:10,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-13 10:19:10,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800479302] [2020-10-13 10:19:10,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-13 10:19:10,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:19:10,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-13 10:19:10,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:19:10,095 INFO L87 Difference]: Start difference. First operand 339 states and 436 transitions. Second operand 61 states. [2020-10-13 10:19:10,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:19:10,711 INFO L93 Difference]: Finished difference Result 356 states and 458 transitions. [2020-10-13 10:19:10,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 10:19:10,712 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 289 [2020-10-13 10:19:10,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:19:10,714 INFO L225 Difference]: With dead ends: 356 [2020-10-13 10:19:10,714 INFO L226 Difference]: Without dead ends: 349 [2020-10-13 10:19:10,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:19:10,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-13 10:19:10,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2020-10-13 10:19:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-13 10:19:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 444 transitions. [2020-10-13 10:19:10,722 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 444 transitions. Word has length 289 [2020-10-13 10:19:10,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:19:10,722 INFO L479 AbstractCegarLoop]: Abstraction has 345 states and 444 transitions. [2020-10-13 10:19:10,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-13 10:19:10,722 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 444 transitions. [2020-10-13 10:19:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-10-13 10:19:10,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:10,724 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:10,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:19:10,724 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:10,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:10,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2107255877, now seen corresponding path program 49 times [2020-10-13 10:19:10,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:10,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734348990] [2020-10-13 10:19:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:10,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:14,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:14,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 300 [2020-10-13 10:19:14,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:14,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3463 [2020-10-13 10:19:14,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:14,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-13 10:19:14,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:19:14,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 284 [2020-10-13 10:19:14,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:16,531 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:19:16,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:19:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:16,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:16,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:16,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:19:16,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:16,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:19:16,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:16,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:16,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:19:16,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:16,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:19:16,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734348990] [2020-10-13 10:19:16,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:19:16,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 10:19:16,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585410182] [2020-10-13 10:19:16,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 10:19:16,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:19:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 10:19:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 10:19:16,606 INFO L87 Difference]: Start difference. First operand 345 states and 444 transitions. Second operand 62 states. [2020-10-13 10:19:17,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:19:17,199 INFO L93 Difference]: Finished difference Result 362 states and 466 transitions. [2020-10-13 10:19:17,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 10:19:17,199 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 294 [2020-10-13 10:19:17,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:19:17,202 INFO L225 Difference]: With dead ends: 362 [2020-10-13 10:19:17,202 INFO L226 Difference]: Without dead ends: 355 [2020-10-13 10:19:17,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 10:19:17,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-13 10:19:17,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 351. [2020-10-13 10:19:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-13 10:19:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 452 transitions. [2020-10-13 10:19:17,209 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 452 transitions. Word has length 294 [2020-10-13 10:19:17,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:19:17,209 INFO L479 AbstractCegarLoop]: Abstraction has 351 states and 452 transitions. [2020-10-13 10:19:17,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 10:19:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 452 transitions. [2020-10-13 10:19:17,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-13 10:19:17,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:17,211 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:17,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:19:17,212 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:17,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:17,212 INFO L82 PathProgramCache]: Analyzing trace with hash -326186385, now seen corresponding path program 50 times [2020-10-13 10:19:17,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:17,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655481855] [2020-10-13 10:19:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:17,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:20,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:20,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 305 [2020-10-13 10:19:20,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:20,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3595 [2020-10-13 10:19:20,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 10:19:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:19:20,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 289 [2020-10-13 10:19:20,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:23,221 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:19:23,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:19:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:23,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:23,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:23,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:19:23,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:23,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:19:23,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:19:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:23,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6225 backedges. 0 proven. 6225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:19:23,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655481855] [2020-10-13 10:19:23,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:19:23,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-13 10:19:23,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14407914] [2020-10-13 10:19:23,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-13 10:19:23,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:19:23,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-13 10:19:23,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 10:19:23,330 INFO L87 Difference]: Start difference. First operand 351 states and 452 transitions. Second operand 63 states. [2020-10-13 10:19:23,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:19:23,971 INFO L93 Difference]: Finished difference Result 368 states and 474 transitions. [2020-10-13 10:19:23,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 10:19:23,971 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 299 [2020-10-13 10:19:23,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:19:23,974 INFO L225 Difference]: With dead ends: 368 [2020-10-13 10:19:23,974 INFO L226 Difference]: Without dead ends: 361 [2020-10-13 10:19:23,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 10:19:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-13 10:19:23,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 357. [2020-10-13 10:19:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-13 10:19:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 460 transitions. [2020-10-13 10:19:23,981 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 460 transitions. Word has length 299 [2020-10-13 10:19:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:19:23,982 INFO L479 AbstractCegarLoop]: Abstraction has 357 states and 460 transitions. [2020-10-13 10:19:23,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-13 10:19:23,982 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 460 transitions. [2020-10-13 10:19:23,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-10-13 10:19:23,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:23,984 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:23,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:19:23,984 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:23,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1766333381, now seen corresponding path program 51 times [2020-10-13 10:19:23,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:23,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157754560] [2020-10-13 10:19:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:24,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:27,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:27,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-13 10:19:27,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:27,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3701 [2020-10-13 10:19:27,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:27,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-13 10:19:27,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:19:27,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 294 [2020-10-13 10:19:27,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:30,132 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:19:30,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:19:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:30,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:30,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:30,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:19:30,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:30,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:19:30,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:30,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:30,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:19:30,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:30,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6477 backedges. 0 proven. 6477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:19:30,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157754560] [2020-10-13 10:19:30,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:19:30,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-13 10:19:30,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142810634] [2020-10-13 10:19:30,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-13 10:19:30,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:19:30,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-13 10:19:30,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 10:19:30,211 INFO L87 Difference]: Start difference. First operand 357 states and 460 transitions. Second operand 64 states. [2020-10-13 10:19:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:19:30,782 INFO L93 Difference]: Finished difference Result 374 states and 482 transitions. [2020-10-13 10:19:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 10:19:30,783 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 304 [2020-10-13 10:19:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:19:30,786 INFO L225 Difference]: With dead ends: 374 [2020-10-13 10:19:30,786 INFO L226 Difference]: Without dead ends: 367 [2020-10-13 10:19:30,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 10:19:30,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-13 10:19:30,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 363. [2020-10-13 10:19:30,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-10-13 10:19:30,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 468 transitions. [2020-10-13 10:19:30,794 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 468 transitions. Word has length 304 [2020-10-13 10:19:30,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:19:30,794 INFO L479 AbstractCegarLoop]: Abstraction has 363 states and 468 transitions. [2020-10-13 10:19:30,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-13 10:19:30,795 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 468 transitions. [2020-10-13 10:19:30,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-13 10:19:30,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:30,797 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:30,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:19:30,797 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:30,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:30,797 INFO L82 PathProgramCache]: Analyzing trace with hash -479000081, now seen corresponding path program 52 times [2020-10-13 10:19:30,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:30,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790145362] [2020-10-13 10:19:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:30,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:34,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:34,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-13 10:19:34,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:34,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3775 [2020-10-13 10:19:34,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:34,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-13 10:19:34,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:19:34,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 299 [2020-10-13 10:19:34,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:37,142 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:19:37,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:19:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:37,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:37,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:37,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:19:37,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:37,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:19:37,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:37,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:37,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:19:37,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:37,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:19:37,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790145362] [2020-10-13 10:19:37,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:19:37,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-13 10:19:37,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647090680] [2020-10-13 10:19:37,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-13 10:19:37,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:19:37,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-13 10:19:37,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 10:19:37,224 INFO L87 Difference]: Start difference. First operand 363 states and 468 transitions. Second operand 65 states. [2020-10-13 10:19:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:19:37,839 INFO L93 Difference]: Finished difference Result 380 states and 490 transitions. [2020-10-13 10:19:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-13 10:19:37,840 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 309 [2020-10-13 10:19:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:19:37,842 INFO L225 Difference]: With dead ends: 380 [2020-10-13 10:19:37,842 INFO L226 Difference]: Without dead ends: 373 [2020-10-13 10:19:37,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 10:19:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-13 10:19:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 369. [2020-10-13 10:19:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-13 10:19:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 476 transitions. [2020-10-13 10:19:37,849 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 476 transitions. Word has length 309 [2020-10-13 10:19:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:19:37,849 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 476 transitions. [2020-10-13 10:19:37,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-13 10:19:37,850 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 476 transitions. [2020-10-13 10:19:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-10-13 10:19:37,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:37,851 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:37,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 10:19:37,852 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:37,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:37,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1441835845, now seen corresponding path program 53 times [2020-10-13 10:19:37,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:37,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225679267] [2020-10-13 10:19:37,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:37,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:41,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:41,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-13 10:19:41,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:41,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3931 [2020-10-13 10:19:41,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:41,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-13 10:19:41,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:19:41,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 304 [2020-10-13 10:19:41,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:44,426 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:19:44,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:19:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:44,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:44,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:44,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:19:44,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:44,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:19:44,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:44,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:44,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:19:44,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:44,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6996 backedges. 0 proven. 6996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:19:44,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225679267] [2020-10-13 10:19:44,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:19:44,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-13 10:19:44,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678258661] [2020-10-13 10:19:44,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-13 10:19:44,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:19:44,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-13 10:19:44,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 10:19:44,545 INFO L87 Difference]: Start difference. First operand 369 states and 476 transitions. Second operand 66 states. [2020-10-13 10:19:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:19:45,166 INFO L93 Difference]: Finished difference Result 386 states and 498 transitions. [2020-10-13 10:19:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-13 10:19:45,166 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 314 [2020-10-13 10:19:45,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:19:45,169 INFO L225 Difference]: With dead ends: 386 [2020-10-13 10:19:45,169 INFO L226 Difference]: Without dead ends: 379 [2020-10-13 10:19:45,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 10:19:45,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-13 10:19:45,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 375. [2020-10-13 10:19:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-10-13 10:19:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 484 transitions. [2020-10-13 10:19:45,177 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 484 transitions. Word has length 314 [2020-10-13 10:19:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:19:45,177 INFO L479 AbstractCegarLoop]: Abstraction has 375 states and 484 transitions. [2020-10-13 10:19:45,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-13 10:19:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 484 transitions. [2020-10-13 10:19:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-13 10:19:45,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:45,179 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:45,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 10:19:45,179 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:45,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1202579823, now seen corresponding path program 54 times [2020-10-13 10:19:45,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:45,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953440755] [2020-10-13 10:19:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:45,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:49,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:49,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-13 10:19:49,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:49,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3937 [2020-10-13 10:19:49,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:49,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-13 10:19:49,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:19:49,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 309 [2020-10-13 10:19:49,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:51,821 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:19:51,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:19:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:51,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:51,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:51,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:19:51,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:51,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:19:51,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:51,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:51,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:19:51,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:51,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7263 backedges. 0 proven. 7263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:19:51,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953440755] [2020-10-13 10:19:51,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:19:51,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-13 10:19:51,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154790257] [2020-10-13 10:19:51,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-13 10:19:51,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:19:51,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-13 10:19:51,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 10:19:51,902 INFO L87 Difference]: Start difference. First operand 375 states and 484 transitions. Second operand 67 states. [2020-10-13 10:19:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:19:52,510 INFO L93 Difference]: Finished difference Result 392 states and 506 transitions. [2020-10-13 10:19:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-13 10:19:52,510 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 319 [2020-10-13 10:19:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:19:52,513 INFO L225 Difference]: With dead ends: 392 [2020-10-13 10:19:52,513 INFO L226 Difference]: Without dead ends: 385 [2020-10-13 10:19:52,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 10:19:52,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-13 10:19:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 381. [2020-10-13 10:19:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-13 10:19:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 492 transitions. [2020-10-13 10:19:52,519 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 492 transitions. Word has length 319 [2020-10-13 10:19:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:19:52,520 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 492 transitions. [2020-10-13 10:19:52,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-13 10:19:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 492 transitions. [2020-10-13 10:19:52,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-13 10:19:52,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:52,522 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:52,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 10:19:52,522 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:52,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1026827579, now seen corresponding path program 55 times [2020-10-13 10:19:52,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:52,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431483021] [2020-10-13 10:19:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:52,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:56,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:56,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-13 10:19:56,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:56,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4163 [2020-10-13 10:19:56,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:56,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-13 10:19:56,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:19:56,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 314 [2020-10-13 10:19:56,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:59,511 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:19:59,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:19:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:59,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:59,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:59,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:19:59,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:59,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:19:59,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:59,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:59,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:19:59,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:59,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7535 backedges. 0 proven. 7535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:19:59,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431483021] [2020-10-13 10:19:59,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:19:59,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-13 10:19:59,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629769689] [2020-10-13 10:19:59,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-13 10:19:59,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:19:59,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-13 10:19:59,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 10:19:59,597 INFO L87 Difference]: Start difference. First operand 381 states and 492 transitions. Second operand 68 states. [2020-10-13 10:20:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:20:00,358 INFO L93 Difference]: Finished difference Result 398 states and 514 transitions. [2020-10-13 10:20:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-13 10:20:00,359 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 324 [2020-10-13 10:20:00,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:20:00,361 INFO L225 Difference]: With dead ends: 398 [2020-10-13 10:20:00,361 INFO L226 Difference]: Without dead ends: 391 [2020-10-13 10:20:00,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-13 10:20:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-10-13 10:20:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 387. [2020-10-13 10:20:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-13 10:20:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 500 transitions. [2020-10-13 10:20:00,368 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 500 transitions. Word has length 324 [2020-10-13 10:20:00,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:20:00,368 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 500 transitions. [2020-10-13 10:20:00,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-13 10:20:00,368 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 500 transitions. [2020-10-13 10:20:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-13 10:20:00,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:20:00,370 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:20:00,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 10:20:00,371 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:20:00,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:20:00,371 INFO L82 PathProgramCache]: Analyzing trace with hash -713594641, now seen corresponding path program 56 times [2020-10-13 10:20:00,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:20:00,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536614250] [2020-10-13 10:20:00,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:20:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:20:00,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:20:04,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:20:04,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-13 10:20:04,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:20:04,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4349 [2020-10-13 10:20:04,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:20:04,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-13 10:20:04,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:20:04,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 319 [2020-10-13 10:20:04,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:20:07,628 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:20:07,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:20:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:20:07,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:20:07,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:20:07,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:20:07,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:20:07,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:20:07,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:20:07,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:20:07,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:20:07,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:20:07,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:20:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:20:07,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536614250] [2020-10-13 10:20:07,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:20:07,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-13 10:20:07,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291806672] [2020-10-13 10:20:07,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-13 10:20:07,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:20:07,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-13 10:20:07,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 10:20:07,754 INFO L87 Difference]: Start difference. First operand 387 states and 500 transitions. Second operand 69 states. [2020-10-13 10:20:08,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:20:08,509 INFO L93 Difference]: Finished difference Result 404 states and 522 transitions. [2020-10-13 10:20:08,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-13 10:20:08,509 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 329 [2020-10-13 10:20:08,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:20:08,512 INFO L225 Difference]: With dead ends: 404 [2020-10-13 10:20:08,512 INFO L226 Difference]: Without dead ends: 397 [2020-10-13 10:20:08,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 10:20:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-13 10:20:08,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2020-10-13 10:20:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-10-13 10:20:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 508 transitions. [2020-10-13 10:20:08,518 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 508 transitions. Word has length 329 [2020-10-13 10:20:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:20:08,518 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 508 transitions. [2020-10-13 10:20:08,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-13 10:20:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 508 transitions. [2020-10-13 10:20:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-13 10:20:08,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:20:08,520 INFO L422 BasicCegarLoop]: trace histogram [58, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:20:08,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 10:20:08,520 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:20:08,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:20:08,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1995331003, now seen corresponding path program 57 times [2020-10-13 10:20:08,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:20:08,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936599820] [2020-10-13 10:20:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:20:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:20:08,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:20:12,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:20:12,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 340 [2020-10-13 10:20:12,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:20:12,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4313 [2020-10-13 10:20:12,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:20:12,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-13 10:20:12,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:20:12,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 324 [2020-10-13 10:20:12,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:20:15,792 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:20:15,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:20:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:20:15,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:20:15,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:20:15,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:20:15,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:20:15,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:20:15,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:20:15,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:20:15,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:20:15,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:20:15,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:20:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8094 backedges. 0 proven. 8094 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:20:15,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936599820] [2020-10-13 10:20:15,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:20:15,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-13 10:20:15,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988448059] [2020-10-13 10:20:15,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-13 10:20:15,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:20:15,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-13 10:20:15,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 10:20:15,882 INFO L87 Difference]: Start difference. First operand 393 states and 508 transitions. Second operand 70 states. [2020-10-13 10:20:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:20:16,667 INFO L93 Difference]: Finished difference Result 410 states and 530 transitions. [2020-10-13 10:20:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-13 10:20:16,668 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 334 [2020-10-13 10:20:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:20:16,670 INFO L225 Difference]: With dead ends: 410 [2020-10-13 10:20:16,670 INFO L226 Difference]: Without dead ends: 403 [2020-10-13 10:20:16,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 10:20:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-13 10:20:16,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 399. [2020-10-13 10:20:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-13 10:20:16,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 516 transitions. [2020-10-13 10:20:16,676 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 516 transitions. Word has length 334 [2020-10-13 10:20:16,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:20:16,676 INFO L479 AbstractCegarLoop]: Abstraction has 399 states and 516 transitions. [2020-10-13 10:20:16,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-13 10:20:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 516 transitions. [2020-10-13 10:20:16,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-13 10:20:16,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:20:16,678 INFO L422 BasicCegarLoop]: trace histogram [59, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:20:16,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 10:20:16,678 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:20:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:20:16,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1661438063, now seen corresponding path program 58 times [2020-10-13 10:20:16,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:20:16,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603139717] [2020-10-13 10:20:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:20:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:20:16,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:20:21,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:20:21,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-13 10:20:21,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:20:21,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4576 [2020-10-13 10:20:21,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:20:21,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-13 10:20:21,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:20:21,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 329 [2020-10-13 10:20:21,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:20:24,280 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:20:24,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:20:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:20:24,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:20:24,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:20:24,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:20:24,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:20:24,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:20:24,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:20:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:20:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:20:24,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:20:24,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:20:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8381 backedges. 0 proven. 8381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:20:24,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603139717] [2020-10-13 10:20:24,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:20:24,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-13 10:20:24,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432620328] [2020-10-13 10:20:24,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-13 10:20:24,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:20:24,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-13 10:20:24,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 10:20:24,369 INFO L87 Difference]: Start difference. First operand 399 states and 516 transitions. Second operand 71 states.