/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 SingleStatement --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:09:23,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:09:23,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:09:23,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:09:23,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:09:23,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:09:23,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:09:23,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:09:23,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:09:23,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:09:23,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:09:23,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:09:23,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:09:23,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:09:23,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:09:23,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:09:23,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:09:23,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:09:23,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:09:23,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:09:23,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:09:23,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:09:23,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:09:23,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:09:23,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:09:23,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:09:23,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:09:23,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:09:23,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:09:23,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:09:23,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:09:23,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:09:23,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:09:23,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:09:23,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:09:23,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:09:23,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:09:23,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:09:23,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:09:23,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:09:23,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:09:23,987 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 [2020-09-24 16:09:24,012 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:09:24,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:09:24,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:09:24,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:09:24,015 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:09:24,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:09:24,015 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:09:24,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:09:24,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:09:24,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:09:24,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:09:24,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:09:24,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:09:24,017 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:09:24,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:09:24,017 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:09:24,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:09:24,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:09:24,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:09:24,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:09:24,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:09:24,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:09:24,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:09:24,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:09:24,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:09:24,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:09:24,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:09:24,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:09:24,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:09:24,020 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 -> SingleStatement 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;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-24 16:09:24,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:09:24,476 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:09:24,482 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:09:24,486 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:09:24,488 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:09:24,489 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-24 16:09:24,578 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/958244dd1/495d617a853748208f601b8bc53bf01a/FLAGa437c4f35 [2020-09-24 16:09:25,114 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:09:25,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-24 16:09:25,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/958244dd1/495d617a853748208f601b8bc53bf01a/FLAGa437c4f35 [2020-09-24 16:09:25,457 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/958244dd1/495d617a853748208f601b8bc53bf01a [2020-09-24 16:09:25,475 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:09:25,481 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:09:25,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:09:25,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:09:25,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:09:25,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:09:25" (1/1) ... [2020-09-24 16:09:25,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68901205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:25, skipping insertion in model container [2020-09-24 16:09:25,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:09:25" (1/1) ... [2020-09-24 16:09:25,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:09:25,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:09:25,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:09:25,772 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:09:25,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:09:25,815 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:09:25,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:25 WrapperNode [2020-09-24 16:09:25,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:09:25,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:09:25,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:09:25,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:09:25,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:25" (1/1) ... [2020-09-24 16:09:25,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:25" (1/1) ... [2020-09-24 16:09:25,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:25" (1/1) ... [2020-09-24 16:09:25,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:25" (1/1) ... [2020-09-24 16:09:25,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:25" (1/1) ... [2020-09-24 16:09:25,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:25" (1/1) ... [2020-09-24 16:09:25,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:25" (1/1) ... [2020-09-24 16:09:25,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:09:25,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:09:25,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:09:25,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:09:25,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:25" (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 [2020-09-24 16:09:26,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:09:26,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:09:26,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 16:09:26,029 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-24 16:09:26,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:09:26,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:09:26,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 16:09:26,030 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 16:09:26,030 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-24 16:09:26,030 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 16:09:26,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 16:09:26,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 16:09:26,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:09:26,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 16:09:26,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 16:09:26,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 16:09:26,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:09:26,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:09:26,337 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:09:26,337 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 16:09:26,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:09:26 BoogieIcfgContainer [2020-09-24 16:09:26,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:09:26,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:09:26,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:09:26,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:09:26,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:09:25" (1/3) ... [2020-09-24 16:09:26,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffd65b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:09:26, skipping insertion in model container [2020-09-24 16:09:26,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:25" (2/3) ... [2020-09-24 16:09:26,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffd65b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:09:26, skipping insertion in model container [2020-09-24 16:09:26,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:09:26" (3/3) ... [2020-09-24 16:09:26,352 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-24 16:09:26,364 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:09:26,378 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:09:26,413 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:09:26,440 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:09:26,440 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:09:26,440 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:09:26,440 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:09:26,441 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:09:26,441 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:09:26,441 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:09:26,441 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:09:26,465 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-24 16:09:26,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 16:09:26,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:26,475 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] [2020-09-24 16:09:26,476 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:26,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-09-24 16:09:26,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:26,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561514351] [2020-09-24 16:09:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:26,652 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:26,652 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:26,653 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:26,653 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:26,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 16:09:26,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:26,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 16:09:26,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:26,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:26,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-24 16:09:26,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:26,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:26,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:26,732 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:26,732 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:26,733 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:26,733 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:26,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:26,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:26,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:09:26,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:26,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:26,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:26,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:26,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:26,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:26,772 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:26,773 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:26,773 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:26,773 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:26,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 16:09:26,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:26,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:26,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:26,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:26,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 16:09:26,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:26,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:09:26,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561514351] [2020-09-24 16:09:26,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:09:26,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:09:26,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592915074] [2020-09-24 16:09:26,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:09:26,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:26,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:09:26,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:09:26,821 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-24 16:09:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:27,011 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-24 16:09:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:09:27,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-24 16:09:27,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:27,027 INFO L225 Difference]: With dead ends: 94 [2020-09-24 16:09:27,027 INFO L226 Difference]: Without dead ends: 53 [2020-09-24 16:09:27,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:09:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-24 16:09:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-24 16:09:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-24 16:09:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-24 16:09:27,085 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-24 16:09:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:27,086 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-24 16:09:27,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:09:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-24 16:09:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 16:09:27,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:27,088 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] [2020-09-24 16:09:27,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:09:27,089 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:27,089 INFO L82 PathProgramCache]: Analyzing trace with hash 929440641, now seen corresponding path program 1 times [2020-09-24 16:09:27,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:27,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295337822] [2020-09-24 16:09:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:27,153 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:27,154 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:27,157 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:27,157 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:27,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 16:09:27,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:27,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 16:09:27,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:27,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:09:27,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:27,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 16:09:27,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 16:09:27,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:27,245 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:27,245 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:27,245 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:27,247 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:27,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:27,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:27,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:09:27,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:27,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:27,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:27,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:27,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:27,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:27,298 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:27,298 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:27,298 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:27,299 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:27,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 16:09:27,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:27,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 16:09:27,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:27,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:09:27,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:27,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 16:09:27,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:09:27,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295337822] [2020-09-24 16:09:27,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:09:27,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 16:09:27,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481177402] [2020-09-24 16:09:27,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 16:09:27,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:27,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 16:09:27,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:09:27,356 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 7 states. [2020-09-24 16:09:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:27,642 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-09-24 16:09:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 16:09:27,643 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-24 16:09:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:27,644 INFO L225 Difference]: With dead ends: 81 [2020-09-24 16:09:27,644 INFO L226 Difference]: Without dead ends: 54 [2020-09-24 16:09:27,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:09:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-24 16:09:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-24 16:09:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 16:09:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-24 16:09:27,656 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-24 16:09:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:27,656 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-24 16:09:27,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 16:09:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-24 16:09:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 16:09:27,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:27,658 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] [2020-09-24 16:09:27,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:09:27,659 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:27,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:27,659 INFO L82 PathProgramCache]: Analyzing trace with hash -300797571, now seen corresponding path program 1 times [2020-09-24 16:09:27,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:27,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551816987] [2020-09-24 16:09:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:27,709 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:27,710 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:27,710 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:27,710 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:27,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 16:09:27,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:27,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 16:09:27,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:27,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:09:27,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:27,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 16:09:27,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:27,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:27,776 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:27,776 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:27,776 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:27,777 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:27,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:27,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:27,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:27,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:27,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:27,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:27,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:27,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:27,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:27,842 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:27,843 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:27,844 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:27,844 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:27,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 16:09:27,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:27,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 16:09:27,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:27,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:09:27,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:27,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 16:09:27,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:09:27,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551816987] [2020-09-24 16:09:27,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:27,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 16:09:27,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035007350] [2020-09-24 16:09:27,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 16:09:27,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:27,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 16:09:27,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:09:27,953 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-09-24 16:09:28,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:28,232 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-09-24 16:09:28,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 16:09:28,232 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-24 16:09:28,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:28,234 INFO L225 Difference]: With dead ends: 87 [2020-09-24 16:09:28,234 INFO L226 Difference]: Without dead ends: 60 [2020-09-24 16:09:28,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-09-24 16:09:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-24 16:09:28,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-09-24 16:09:28,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-24 16:09:28,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-09-24 16:09:28,244 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-09-24 16:09:28,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:28,244 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-09-24 16:09:28,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 16:09:28,245 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-09-24 16:09:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 16:09:28,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:28,246 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:28,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:09:28,247 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1218260359, now seen corresponding path program 2 times [2020-09-24 16:09:28,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:28,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057938651] [2020-09-24 16:09:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,280 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,280 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,281 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,281 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 16:09:28,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:09:28,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:09:28,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 16:09:28,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 16:09:28,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:28,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,316 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,316 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,317 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,317 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:28,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:28,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:28,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:28,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,342 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,343 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,343 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,343 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 16:09:28,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:28,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:28,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:28,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:28,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 16:09:28,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057938651] [2020-09-24 16:09:28,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:09:28,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:09:28,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084222242] [2020-09-24 16:09:28,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:09:28,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:28,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:09:28,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:09:28,361 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 5 states. [2020-09-24 16:09:28,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:28,500 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-09-24 16:09:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:09:28,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-09-24 16:09:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:28,504 INFO L225 Difference]: With dead ends: 86 [2020-09-24 16:09:28,504 INFO L226 Difference]: Without dead ends: 71 [2020-09-24 16:09:28,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:09:28,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-24 16:09:28,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-09-24 16:09:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 16:09:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-09-24 16:09:28,519 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 41 [2020-09-24 16:09:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:28,520 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-09-24 16:09:28,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:09:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-09-24 16:09:28,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 16:09:28,535 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:28,535 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:28,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:09:28,535 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:28,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:28,536 INFO L82 PathProgramCache]: Analyzing trace with hash -632447720, now seen corresponding path program 1 times [2020-09-24 16:09:28,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:28,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701348820] [2020-09-24 16:09:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,589 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,590 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,590 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,590 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 16:09:28,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 16:09:28,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:09:28,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 16:09:28,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 16:09:28,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:28,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,640 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,640 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,640 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,641 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:28,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:28,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:28,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:28,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,663 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,663 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,663 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,663 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 16:09:28,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:28,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:28,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:28,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:28,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 16:09:28,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701348820] [2020-09-24 16:09:28,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:28,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 16:09:28,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938041859] [2020-09-24 16:09:28,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 16:09:28,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:28,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 16:09:28,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:09:28,678 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-09-24 16:09:28,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:28,868 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-09-24 16:09:28,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 16:09:28,869 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-09-24 16:09:28,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:28,870 INFO L225 Difference]: With dead ends: 95 [2020-09-24 16:09:28,870 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 16:09:28,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 16:09:28,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 16:09:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-24 16:09:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-24 16:09:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-09-24 16:09:28,879 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 48 [2020-09-24 16:09:28,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:28,880 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-09-24 16:09:28,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 16:09:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-09-24 16:09:28,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 16:09:28,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:28,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:28,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:09:28,882 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:28,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:28,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1369017959, now seen corresponding path program 2 times [2020-09-24 16:09:28,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:28,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911809379] [2020-09-24 16:09:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,920 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,920 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,921 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,921 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 16:09:28,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 16:09:28,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:09:28,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:28,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 16:09:28,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:28,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,954 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,954 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,954 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,954 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:28,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:28,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:28,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:28,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:28,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:28,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:28,991 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:28,991 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:28,991 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:28,992 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:28,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 16:09:28,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:28,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 16:09:28,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:28,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:09:28,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:28,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 16:09:28,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:29,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911809379] [2020-09-24 16:09:29,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:29,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 16:09:29,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364659831] [2020-09-24 16:09:29,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 16:09:29,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:29,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 16:09:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:09:29,245 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 11 states. [2020-09-24 16:09:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:29,644 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2020-09-24 16:09:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 16:09:29,645 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-09-24 16:09:29,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:29,646 INFO L225 Difference]: With dead ends: 113 [2020-09-24 16:09:29,646 INFO L226 Difference]: Without dead ends: 76 [2020-09-24 16:09:29,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:09:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-24 16:09:29,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-09-24 16:09:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 16:09:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-09-24 16:09:29,655 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-09-24 16:09:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:29,655 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-09-24 16:09:29,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 16:09:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-09-24 16:09:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 16:09:29,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:29,657 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:29,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:09:29,658 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:29,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:29,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1346847595, now seen corresponding path program 3 times [2020-09-24 16:09:29,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:29,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709078476] [2020-09-24 16:09:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:29,743 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:29,743 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:29,743 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:29,743 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:29,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-24 16:09:29,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:29,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 16:09:29,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:29,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:09:29,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:29,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 16:09:29,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:29,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:29,788 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:29,789 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:29,789 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:29,789 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:29,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:29,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:29,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:09:29,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:29,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:29,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:29,846 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:29,847 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:29,847 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:29,847 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:29,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 16:09:29,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:29,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-24 16:09:29,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:29,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:09:29,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:29,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 16:09:29,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:29,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709078476] [2020-09-24 16:09:29,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:29,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 16:09:29,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917773425] [2020-09-24 16:09:29,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 16:09:29,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:29,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 16:09:29,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-24 16:09:29,966 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 13 states. [2020-09-24 16:09:30,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:30,476 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2020-09-24 16:09:30,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 16:09:30,476 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-09-24 16:09:30,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:30,478 INFO L225 Difference]: With dead ends: 119 [2020-09-24 16:09:30,478 INFO L226 Difference]: Without dead ends: 82 [2020-09-24 16:09:30,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2020-09-24 16:09:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-24 16:09:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-09-24 16:09:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 16:09:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-09-24 16:09:30,505 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-09-24 16:09:30,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:30,505 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-09-24 16:09:30,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 16:09:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-09-24 16:09:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 16:09:30,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:30,507 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:30,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:09:30,507 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:30,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:30,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1957832047, now seen corresponding path program 4 times [2020-09-24 16:09:30,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:30,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794369166] [2020-09-24 16:09:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:30,558 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:30,559 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:30,559 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:30,560 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:30,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 16:09:30,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:30,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 16:09:30,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:30,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:09:30,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:30,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 16:09:30,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:30,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:30,600 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:30,600 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:30,600 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:30,600 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:30,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:30,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:30,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:30,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:30,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:30,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:30,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:30,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:30,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:30,649 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:30,650 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:30,650 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:30,650 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:30,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 16:09:30,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:30,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 16:09:30,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:30,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:09:30,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:30,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 16:09:30,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:30,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794369166] [2020-09-24 16:09:30,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:30,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 16:09:30,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996923549] [2020-09-24 16:09:30,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 16:09:30,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:30,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 16:09:30,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:09:30,808 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2020-09-24 16:09:31,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:31,322 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2020-09-24 16:09:31,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 16:09:31,323 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-24 16:09:31,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:31,324 INFO L225 Difference]: With dead ends: 125 [2020-09-24 16:09:31,324 INFO L226 Difference]: Without dead ends: 88 [2020-09-24 16:09:31,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-09-24 16:09:31,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-24 16:09:31,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-09-24 16:09:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 16:09:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-09-24 16:09:31,333 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-09-24 16:09:31,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:31,333 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-09-24 16:09:31,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 16:09:31,334 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-09-24 16:09:31,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 16:09:31,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:31,335 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:31,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 16:09:31,335 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:31,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:31,336 INFO L82 PathProgramCache]: Analyzing trace with hash -897873011, now seen corresponding path program 5 times [2020-09-24 16:09:31,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:31,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987227694] [2020-09-24 16:09:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:31,385 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:31,385 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:31,385 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:31,385 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:31,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 16:09:31,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:31,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 16:09:31,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:31,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 16:09:31,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:31,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 16:09:31,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:31,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:31,422 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:31,422 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:31,423 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:31,423 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:31,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:31,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:31,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:31,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:31,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:31,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:31,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:31,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:31,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:31,482 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:31,483 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:31,483 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:31,483 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:31,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 16:09:31,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:31,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 16:09:31,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:31,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 16:09:31,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:31,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 16:09:31,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:32,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987227694] [2020-09-24 16:09:32,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:32,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 16:09:32,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045947296] [2020-09-24 16:09:32,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 16:09:32,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:32,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 16:09:32,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-24 16:09:32,025 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 17 states. [2020-09-24 16:09:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:32,648 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2020-09-24 16:09:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 16:09:32,648 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-09-24 16:09:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:32,650 INFO L225 Difference]: With dead ends: 131 [2020-09-24 16:09:32,651 INFO L226 Difference]: Without dead ends: 94 [2020-09-24 16:09:32,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-09-24 16:09:32,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-24 16:09:32,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-09-24 16:09:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-24 16:09:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-09-24 16:09:32,666 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-09-24 16:09:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:32,667 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-09-24 16:09:32,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 16:09:32,670 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-09-24 16:09:32,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 16:09:32,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:32,672 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:32,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 16:09:32,672 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:32,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:32,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1891135607, now seen corresponding path program 6 times [2020-09-24 16:09:32,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:32,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013948647] [2020-09-24 16:09:32,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:32,733 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:32,733 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:32,733 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:32,733 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:32,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 16:09:32,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:32,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 16:09:32,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:32,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 16:09:32,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:32,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 16:09:32,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:32,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:32,786 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:32,786 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:32,786 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:32,786 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:32,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:32,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:32,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:32,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:32,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:32,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:32,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:32,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:32,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:32,857 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:32,858 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:32,858 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:32,858 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:32,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 16:09:32,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:32,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 16:09:32,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 16:09:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 16:09:32,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:33,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013948647] [2020-09-24 16:09:33,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:33,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 16:09:33,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161984196] [2020-09-24 16:09:33,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 16:09:33,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:33,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 16:09:33,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:09:33,112 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 19 states. [2020-09-24 16:09:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:34,002 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2020-09-24 16:09:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 16:09:34,003 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-09-24 16:09:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:34,005 INFO L225 Difference]: With dead ends: 137 [2020-09-24 16:09:34,005 INFO L226 Difference]: Without dead ends: 100 [2020-09-24 16:09:34,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2020-09-24 16:09:34,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-24 16:09:34,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-09-24 16:09:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-24 16:09:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-09-24 16:09:34,013 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-09-24 16:09:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:34,014 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-09-24 16:09:34,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 16:09:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-09-24 16:09:34,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-24 16:09:34,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:34,015 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:34,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 16:09:34,015 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:34,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:34,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1348970117, now seen corresponding path program 7 times [2020-09-24 16:09:34,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:34,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491833687] [2020-09-24 16:09:34,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:34,096 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:34,097 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:34,097 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:34,097 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:34,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-24 16:09:34,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:34,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-24 16:09:34,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:34,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 16:09:34,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:34,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 16:09:34,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:34,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:34,140 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:34,140 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:34,140 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:34,141 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:34,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:34,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:34,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:34,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:34,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:34,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:34,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:34,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:34,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:34,219 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:34,220 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:34,220 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:34,220 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:34,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 16:09:34,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:34,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 16:09:34,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:34,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 16:09:34,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:34,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 16:09:34,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:34,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491833687] [2020-09-24 16:09:34,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:34,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 16:09:34,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973137392] [2020-09-24 16:09:34,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 16:09:34,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:34,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 16:09:34,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-09-24 16:09:34,487 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 21 states. [2020-09-24 16:09:35,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:35,557 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-09-24 16:09:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 16:09:35,558 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-09-24 16:09:35,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:35,559 INFO L225 Difference]: With dead ends: 143 [2020-09-24 16:09:35,559 INFO L226 Difference]: Without dead ends: 106 [2020-09-24 16:09:35,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1632, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 16:09:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-24 16:09:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-09-24 16:09:35,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-24 16:09:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-09-24 16:09:35,567 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-09-24 16:09:35,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:35,568 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-09-24 16:09:35,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 16:09:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-09-24 16:09:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-24 16:09:35,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:35,569 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:35,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 16:09:35,570 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:35,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:35,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1790865279, now seen corresponding path program 8 times [2020-09-24 16:09:35,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:35,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49953813] [2020-09-24 16:09:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:35,654 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:35,654 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:35,655 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:35,655 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:35,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 16:09:35,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:35,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-24 16:09:35,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:35,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 16:09:35,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:35,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-24 16:09:35,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:35,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:35,696 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:35,696 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:35,696 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:35,697 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:35,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:35,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:35,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:35,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:35,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:35,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:35,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:35,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:35,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:35,780 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:35,780 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:35,780 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:35,781 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:35,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 16:09:35,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:35,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 16:09:35,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:35,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 16:09:35,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:35,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-24 16:09:35,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:36,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49953813] [2020-09-24 16:09:36,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:36,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 16:09:36,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457273184] [2020-09-24 16:09:36,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 16:09:36,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:36,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 16:09:36,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-09-24 16:09:36,583 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 23 states. [2020-09-24 16:09:37,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:37,574 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2020-09-24 16:09:37,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 16:09:37,574 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 91 [2020-09-24 16:09:37,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:37,575 INFO L225 Difference]: With dead ends: 149 [2020-09-24 16:09:37,576 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 16:09:37,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 16:09:37,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 16:09:37,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-09-24 16:09:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-24 16:09:37,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-09-24 16:09:37,586 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-09-24 16:09:37,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:37,587 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-09-24 16:09:37,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 16:09:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-09-24 16:09:37,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-24 16:09:37,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:37,589 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:37,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 16:09:37,589 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:37,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:37,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1309995651, now seen corresponding path program 9 times [2020-09-24 16:09:37,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:37,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175455941] [2020-09-24 16:09:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:37,684 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:37,684 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:37,684 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:37,685 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:37,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-24 16:09:37,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:37,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-24 16:09:37,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:37,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 16:09:37,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:37,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-24 16:09:37,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:37,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:37,733 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:37,733 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:37,733 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:37,733 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:37,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:37,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:37,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:37,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:37,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:37,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:37,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:37,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:37,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:37,827 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:37,828 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:37,828 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:37,828 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:37,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 16:09:37,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:37,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-24 16:09:37,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:37,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 16:09:37,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:37,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 16:09:37,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:38,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175455941] [2020-09-24 16:09:38,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:38,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 16:09:38,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945390888] [2020-09-24 16:09:38,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 16:09:38,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:38,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 16:09:38,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-09-24 16:09:38,790 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 25 states. [2020-09-24 16:09:39,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:39,958 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2020-09-24 16:09:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 16:09:39,958 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2020-09-24 16:09:39,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:39,960 INFO L225 Difference]: With dead ends: 155 [2020-09-24 16:09:39,960 INFO L226 Difference]: Without dead ends: 118 [2020-09-24 16:09:39,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 16:09:39,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-24 16:09:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-09-24 16:09:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 16:09:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-24 16:09:39,967 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-09-24 16:09:39,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:39,967 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-24 16:09:39,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 16:09:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-24 16:09:39,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-24 16:09:39,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:39,969 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:39,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 16:09:39,969 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:39,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:39,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2094408327, now seen corresponding path program 10 times [2020-09-24 16:09:39,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:39,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681689453] [2020-09-24 16:09:39,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:40,081 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:40,082 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:40,082 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:40,082 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:40,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-09-24 16:09:40,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:40,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-24 16:09:40,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:40,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 16:09:40,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:40,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 16:09:40,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:40,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:40,135 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:40,136 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:40,136 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:40,136 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:40,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:40,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:40,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:40,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:40,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:40,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:40,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:40,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:40,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:40,249 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:40,249 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:40,249 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:40,249 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:40,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 16:09:40,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:40,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-24 16:09:40,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:40,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 16:09:40,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:40,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 16:09:40,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:40,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681689453] [2020-09-24 16:09:40,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:40,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 16:09:40,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200827222] [2020-09-24 16:09:40,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 16:09:40,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:40,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 16:09:40,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2020-09-24 16:09:40,755 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 27 states. [2020-09-24 16:09:42,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:42,079 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2020-09-24 16:09:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-24 16:09:42,079 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 103 [2020-09-24 16:09:42,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:42,080 INFO L225 Difference]: With dead ends: 161 [2020-09-24 16:09:42,081 INFO L226 Difference]: Without dead ends: 124 [2020-09-24 16:09:42,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=950, Invalid=2832, Unknown=0, NotChecked=0, Total=3782 [2020-09-24 16:09:42,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-24 16:09:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-09-24 16:09:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-24 16:09:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-09-24 16:09:42,093 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-09-24 16:09:42,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:42,094 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-09-24 16:09:42,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 16:09:42,094 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-09-24 16:09:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-24 16:09:42,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:42,096 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:42,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 16:09:42,097 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:42,097 INFO L82 PathProgramCache]: Analyzing trace with hash 712228981, now seen corresponding path program 11 times [2020-09-24 16:09:42,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:42,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657777899] [2020-09-24 16:09:42,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:42,237 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:42,238 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:42,238 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:42,238 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:42,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-09-24 16:09:42,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:42,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-09-24 16:09:42,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:42,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 16:09:42,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:42,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-24 16:09:42,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:42,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:42,286 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:42,287 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:42,287 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:42,287 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:42,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:42,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:42,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:42,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:42,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:42,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:42,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:42,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:42,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:42,415 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:42,415 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:42,415 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:42,415 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:42,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-24 16:09:42,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:42,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-24 16:09:42,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:42,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 16:09:42,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:42,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 16:09:42,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:43,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657777899] [2020-09-24 16:09:43,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:43,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-24 16:09:43,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539088787] [2020-09-24 16:09:43,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-24 16:09:43,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:43,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-24 16:09:43,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-09-24 16:09:43,071 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 29 states. [2020-09-24 16:09:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:44,641 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2020-09-24 16:09:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-24 16:09:44,642 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2020-09-24 16:09:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:44,643 INFO L225 Difference]: With dead ends: 167 [2020-09-24 16:09:44,644 INFO L226 Difference]: Without dead ends: 130 [2020-09-24 16:09:44,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1118, Invalid=3304, Unknown=0, NotChecked=0, Total=4422 [2020-09-24 16:09:44,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-24 16:09:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-09-24 16:09:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-24 16:09:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-09-24 16:09:44,661 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-09-24 16:09:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:44,661 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-09-24 16:09:44,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-24 16:09:44,661 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-09-24 16:09:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-24 16:09:44,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:44,664 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:44,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 16:09:44,664 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:44,665 INFO L82 PathProgramCache]: Analyzing trace with hash -907118991, now seen corresponding path program 12 times [2020-09-24 16:09:44,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:44,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411625447] [2020-09-24 16:09:44,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:44,813 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:44,813 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:44,813 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:44,813 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:44,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-09-24 16:09:44,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:44,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-09-24 16:09:44,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:44,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 16:09:44,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:44,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 16:09:44,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:44,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:44,869 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:44,869 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:44,870 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:44,870 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:44,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:44,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:44,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:44,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:44,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:44,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:44,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:44,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:44,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:45,017 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:45,018 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:45,018 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:45,018 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:45,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 16:09:45,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:45,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-24 16:09:45,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:45,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 16:09:45,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:45,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-24 16:09:45,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:45,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411625447] [2020-09-24 16:09:45,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:45,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-24 16:09:45,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663773382] [2020-09-24 16:09:45,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-24 16:09:45,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:45,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-24 16:09:45,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2020-09-24 16:09:45,588 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 31 states. [2020-09-24 16:09:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:47,408 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2020-09-24 16:09:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-24 16:09:47,409 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 115 [2020-09-24 16:09:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:47,410 INFO L225 Difference]: With dead ends: 173 [2020-09-24 16:09:47,410 INFO L226 Difference]: Without dead ends: 136 [2020-09-24 16:09:47,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1284, Invalid=3686, Unknown=0, NotChecked=0, Total=4970 [2020-09-24 16:09:47,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-24 16:09:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-09-24 16:09:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-24 16:09:47,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-09-24 16:09:47,419 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-09-24 16:09:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:47,419 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-09-24 16:09:47,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-24 16:09:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-09-24 16:09:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-24 16:09:47,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:47,421 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:47,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 16:09:47,421 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:47,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:47,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1081065325, now seen corresponding path program 13 times [2020-09-24 16:09:47,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:47,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727931317] [2020-09-24 16:09:47,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:47,567 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:47,567 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:47,567 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:47,568 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:47,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-09-24 16:09:47,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:47,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-09-24 16:09:47,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:47,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 16:09:47,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:47,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-09-24 16:09:47,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:47,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:47,622 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:47,622 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:47,622 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:47,622 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:47,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:47,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:47,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-24 16:09:47,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:47,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:47,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:47,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:47,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:47,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:47,776 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:47,776 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:47,776 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:47,776 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:47,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-24 16:09:47,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:47,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-09-24 16:09:47,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:47,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 16:09:47,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:47,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 16:09:47,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:48,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727931317] [2020-09-24 16:09:48,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:48,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-24 16:09:48,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250966510] [2020-09-24 16:09:48,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-24 16:09:48,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:48,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-24 16:09:48,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 16:09:48,476 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 33 states. [2020-09-24 16:09:50,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:50,605 INFO L93 Difference]: Finished difference Result 179 states and 189 transitions. [2020-09-24 16:09:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-24 16:09:50,606 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 121 [2020-09-24 16:09:50,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:50,608 INFO L225 Difference]: With dead ends: 179 [2020-09-24 16:09:50,608 INFO L226 Difference]: Without dead ends: 142 [2020-09-24 16:09:50,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1479, Invalid=4221, Unknown=0, NotChecked=0, Total=5700 [2020-09-24 16:09:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-24 16:09:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-09-24 16:09:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-24 16:09:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-09-24 16:09:50,615 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-09-24 16:09:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:50,615 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-09-24 16:09:50,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-24 16:09:50,616 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-09-24 16:09:50,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-24 16:09:50,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:50,617 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:50,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 16:09:50,617 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:50,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:50,618 INFO L82 PathProgramCache]: Analyzing trace with hash -444769431, now seen corresponding path program 14 times [2020-09-24 16:09:50,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:50,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75637148] [2020-09-24 16:09:50,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:50,782 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:50,782 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:50,782 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:50,783 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:50,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-09-24 16:09:50,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:50,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-09-24 16:09:50,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:50,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 16:09:50,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:50,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-24 16:09:50,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:50,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:50,831 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:50,831 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:50,831 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:50,831 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:50,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:50,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:50,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:50,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:50,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:50,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:50,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:50,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:50,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:50,991 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:50,991 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:50,991 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:50,991 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:50,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-09-24 16:09:50,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:50,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-09-24 16:09:50,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:50,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 16:09:50,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:50,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-24 16:09:50,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:51,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75637148] [2020-09-24 16:09:51,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:51,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-24 16:09:51,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269689446] [2020-09-24 16:09:51,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-24 16:09:51,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:51,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-24 16:09:51,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=927, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 16:09:51,783 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 35 states. [2020-09-24 16:09:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:54,185 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2020-09-24 16:09:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-24 16:09:54,186 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 127 [2020-09-24 16:09:54,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:54,188 INFO L225 Difference]: With dead ends: 185 [2020-09-24 16:09:54,188 INFO L226 Difference]: Without dead ends: 148 [2020-09-24 16:09:54,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1706, Invalid=4936, Unknown=0, NotChecked=0, Total=6642 [2020-09-24 16:09:54,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-24 16:09:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-09-24 16:09:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-24 16:09:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-09-24 16:09:54,196 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-09-24 16:09:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:54,196 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-09-24 16:09:54,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-24 16:09:54,197 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-09-24 16:09:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-24 16:09:54,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:54,198 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:54,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 16:09:54,198 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:54,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1162676837, now seen corresponding path program 15 times [2020-09-24 16:09:54,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:54,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172079305] [2020-09-24 16:09:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:54,365 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:54,366 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:54,366 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:54,366 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:54,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-24 16:09:54,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:54,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-09-24 16:09:54,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:54,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 16:09:54,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:54,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-09-24 16:09:54,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:54,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:54,424 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:54,424 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:54,424 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:54,425 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:54,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:54,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:54,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:54,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:54,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:54,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:54,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:54,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:54,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:54,611 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:54,611 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:54,612 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:54,612 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:54,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-09-24 16:09:54,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:54,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-09-24 16:09:54,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:54,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 16:09:54,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:54,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-09-24 16:09:54,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 645 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:09:56,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172079305] [2020-09-24 16:09:56,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:09:56,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-24 16:09:56,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967612275] [2020-09-24 16:09:56,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-24 16:09:56,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:09:56,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-24 16:09:56,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 16:09:56,527 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 37 states. [2020-09-24 16:09:58,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:09:58,973 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2020-09-24 16:09:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-24 16:09:58,974 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 133 [2020-09-24 16:09:58,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:09:58,975 INFO L225 Difference]: With dead ends: 191 [2020-09-24 16:09:58,975 INFO L226 Difference]: Without dead ends: 154 [2020-09-24 16:09:58,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-09-24 16:09:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-24 16:09:58,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-09-24 16:09:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-24 16:09:58,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-09-24 16:09:58,983 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-09-24 16:09:58,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:09:58,984 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-09-24 16:09:58,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-24 16:09:58,984 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-09-24 16:09:58,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 16:09:58,985 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:09:58,985 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:09:58,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 16:09:58,985 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:09:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:09:58,986 INFO L82 PathProgramCache]: Analyzing trace with hash -591098783, now seen corresponding path program 16 times [2020-09-24 16:09:58,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:09:58,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515303780] [2020-09-24 16:09:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:09:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:59,169 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:59,169 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:59,169 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:59,170 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:59,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-09-24 16:09:59,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:59,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-09-24 16:09:59,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:59,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-24 16:09:59,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:09:59,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-09-24 16:09:59,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:09:59,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:09:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:59,226 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:59,226 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:59,227 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:59,227 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:59,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:09:59,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:59,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:09:59,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:59,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:09:59,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:09:59,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:09:59,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:09:59,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:09:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:09:59,419 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:09:59,419 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:09:59,420 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:09:59,420 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:09:59,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-09-24 16:09:59,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:09:59,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-09-24 16:09:59,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:09:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-24 16:09:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:09:59,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-24 16:09:59,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:10:00,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515303780] [2020-09-24 16:10:00,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:00,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-24 16:10:00,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415374010] [2020-09-24 16:10:00,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-24 16:10:00,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:00,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-24 16:10:00,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 16:10:00,457 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 39 states. [2020-09-24 16:10:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:03,185 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2020-09-24 16:10:03,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-24 16:10:03,186 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 139 [2020-09-24 16:10:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:03,187 INFO L225 Difference]: With dead ends: 197 [2020-09-24 16:10:03,188 INFO L226 Difference]: Without dead ends: 160 [2020-09-24 16:10:03,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2168, Invalid=6204, Unknown=0, NotChecked=0, Total=8372 [2020-09-24 16:10:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-24 16:10:03,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-09-24 16:10:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-24 16:10:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-09-24 16:10:03,197 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-09-24 16:10:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:03,197 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-09-24 16:10:03,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-24 16:10:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-09-24 16:10:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-24 16:10:03,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:03,198 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:03,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 16:10:03,199 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:03,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:03,199 INFO L82 PathProgramCache]: Analyzing trace with hash -713449123, now seen corresponding path program 17 times [2020-09-24 16:10:03,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:03,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674911487] [2020-09-24 16:10:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:03,400 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:03,400 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:03,400 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:03,401 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:03,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-09-24 16:10:03,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:03,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-09-24 16:10:03,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:03,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-24 16:10:03,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:10:03,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-24 16:10:03,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:03,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:03,459 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:03,459 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:03,459 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:03,460 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:03,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:03,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:03,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-24 16:10:03,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:03,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:03,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:03,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:03,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:03,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:10:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:03,673 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:03,673 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:03,673 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:03,674 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:03,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-09-24 16:10:03,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:03,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-09-24 16:10:03,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:03,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-24 16:10:03,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:10:03,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-09-24 16:10:03,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 833 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:10:06,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674911487] [2020-09-24 16:10:06,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:06,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-24 16:10:06,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132193372] [2020-09-24 16:10:06,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-24 16:10:06,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:06,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-24 16:10:06,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 16:10:06,192 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 41 states. [2020-09-24 16:10:08,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:08,767 INFO L93 Difference]: Finished difference Result 203 states and 213 transitions. [2020-09-24 16:10:08,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-24 16:10:08,768 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 145 [2020-09-24 16:10:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:08,770 INFO L225 Difference]: With dead ends: 203 [2020-09-24 16:10:08,770 INFO L226 Difference]: Without dead ends: 166 [2020-09-24 16:10:08,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-09-24 16:10:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-24 16:10:08,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-09-24 16:10:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-24 16:10:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-09-24 16:10:08,777 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-09-24 16:10:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:08,777 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-09-24 16:10:08,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-24 16:10:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-09-24 16:10:08,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-24 16:10:08,779 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:08,779 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:08,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 16:10:08,779 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:08,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:08,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1045296807, now seen corresponding path program 18 times [2020-09-24 16:10:08,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:08,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786641169] [2020-09-24 16:10:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:09,003 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:09,004 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:09,004 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:09,004 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:09,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-09-24 16:10:09,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:09,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-09-24 16:10:09,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:09,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-09-24 16:10:09,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:10:09,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-09-24 16:10:09,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:09,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:09,066 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:09,066 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:09,067 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:09,067 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:09,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:09,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:09,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:09,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:09,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:09,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:09,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:10:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:09,296 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:09,296 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:09,297 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:09,297 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:09,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-24 16:10:09,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:09,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-09-24 16:10:09,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-09-24 16:10:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:10:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-09-24 16:10:09,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 936 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:10:10,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786641169] [2020-09-24 16:10:10,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:10,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-09-24 16:10:10,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731830453] [2020-09-24 16:10:10,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-24 16:10:10,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:10,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-24 16:10:10,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 16:10:10,492 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 43 states. [2020-09-24 16:10:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:13,793 INFO L93 Difference]: Finished difference Result 209 states and 219 transitions. [2020-09-24 16:10:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-24 16:10:13,796 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 151 [2020-09-24 16:10:13,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:13,798 INFO L225 Difference]: With dead ends: 209 [2020-09-24 16:10:13,798 INFO L226 Difference]: Without dead ends: 172 [2020-09-24 16:10:13,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2686, Invalid=7616, Unknown=0, NotChecked=0, Total=10302 [2020-09-24 16:10:13,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-24 16:10:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-09-24 16:10:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-24 16:10:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-09-24 16:10:13,805 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-09-24 16:10:13,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:13,805 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-09-24 16:10:13,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-24 16:10:13,805 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-09-24 16:10:13,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-24 16:10:13,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:13,807 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:13,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 16:10:13,807 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:13,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1482916949, now seen corresponding path program 19 times [2020-09-24 16:10:13,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:13,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159455071] [2020-09-24 16:10:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:14,042 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:14,043 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:14,043 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:14,043 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:14,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-24 16:10:14,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:14,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-09-24 16:10:14,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:14,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-09-24 16:10:14,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:10:14,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-09-24 16:10:14,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:14,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:14,136 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:14,137 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:14,137 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:14,137 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:14,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:14,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:14,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:14,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:14,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:14,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:14,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:14,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:14,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:10:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:14,372 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:14,373 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:14,373 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:14,373 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:14,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-09-24 16:10:14,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:14,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-09-24 16:10:14,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:14,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-09-24 16:10:14,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:10:14,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-24 16:10:14,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 1045 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:10:15,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159455071] [2020-09-24 16:10:15,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:15,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-24 16:10:15,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538139742] [2020-09-24 16:10:15,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-24 16:10:15,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:15,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-24 16:10:15,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1530, Unknown=0, NotChecked=0, Total=1980 [2020-09-24 16:10:15,670 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 45 states. [2020-09-24 16:10:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:19,464 INFO L93 Difference]: Finished difference Result 215 states and 225 transitions. [2020-09-24 16:10:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-09-24 16:10:19,465 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 157 [2020-09-24 16:10:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:19,467 INFO L225 Difference]: With dead ends: 215 [2020-09-24 16:10:19,468 INFO L226 Difference]: Without dead ends: 178 [2020-09-24 16:10:19,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2943, Invalid=8187, Unknown=0, NotChecked=0, Total=11130 [2020-09-24 16:10:19,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-24 16:10:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-09-24 16:10:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-24 16:10:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-09-24 16:10:19,480 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-09-24 16:10:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:19,481 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-09-24 16:10:19,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-24 16:10:19,482 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-09-24 16:10:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-24 16:10:19,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:19,484 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:19,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 16:10:19,484 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:19,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:19,485 INFO L82 PathProgramCache]: Analyzing trace with hash 825479761, now seen corresponding path program 20 times [2020-09-24 16:10:19,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:19,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752323998] [2020-09-24 16:10:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:19,815 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:19,816 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:19,816 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:19,817 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:19,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-09-24 16:10:19,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:19,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-09-24 16:10:19,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:19,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-09-24 16:10:19,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 16:10:19,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-09-24 16:10:19,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:19,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:19,896 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:19,896 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:19,896 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:19,896 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:19,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:19,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:19,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:19,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:19,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:19,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:19,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:19,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:19,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 16:10:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:20,215 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:20,216 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:20,216 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:20,216 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:20,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-09-24 16:10:20,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:20,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-09-24 16:10:20,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:20,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-09-24 16:10:20,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 16:10:20,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-09-24 16:10:20,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 1160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 16:10:21,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752323998] [2020-09-24 16:10:21,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:21,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-09-24 16:10:21,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423627796] [2020-09-24 16:10:21,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-09-24 16:10:21,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:21,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-09-24 16:10:21,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1671, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 16:10:21,706 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 47 states.