/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec2_product37.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:41:36,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:41:36,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:41:36,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:41:36,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:41:36,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:41:36,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:41:36,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:41:36,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:41:36,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:41:36,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:41:36,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:41:36,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:41:36,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:41:36,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:41:36,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:41:36,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:41:36,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:41:36,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:41:36,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:41:36,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:41:36,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:41:36,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:41:36,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:41:36,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:41:36,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:41:36,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:41:36,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:41:36,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:41:36,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 14:41:36,508 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:41:36,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:41:36,510 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:41:36,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:41:36,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:41:36,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:41:36,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:41:36,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:41:36,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:41:36,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:41:36,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:41:36,516 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 14:41:36,541 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:41:36,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:41:36,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:41:36,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:41:36,543 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:41:36,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:41:36,544 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:41:36,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:41:36,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:41:36,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:41:36,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:41:36,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:41:36,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:41:36,545 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:41:36,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:41:36,546 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:41:36,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:41:36,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:41:36,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:41:36,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:41:36,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:41:36,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:41:36,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:41:36,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:41:36,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:41:36,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:41:36,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:41:36,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:41:36,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:41:36,549 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 -> false [2020-09-24 14:41:36,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:41:37,015 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:41:37,019 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:41:37,021 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:41:37,023 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:41:37,025 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product37.cil.c [2020-09-24 14:41:37,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac2219215/f63ec5e6b07e4159bdadd2d86e755ffd/FLAG7474bb18d [2020-09-24 14:41:37,711 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:41:37,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec2_product37.cil.c [2020-09-24 14:41:37,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac2219215/f63ec5e6b07e4159bdadd2d86e755ffd/FLAG7474bb18d [2020-09-24 14:41:38,052 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac2219215/f63ec5e6b07e4159bdadd2d86e755ffd [2020-09-24 14:41:38,065 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:41:38,070 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:41:38,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:41:38,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:41:38,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:41:38,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:41:38" (1/1) ... [2020-09-24 14:41:38,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b134fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:41:38, skipping insertion in model container [2020-09-24 14:41:38,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:41:38" (1/1) ... [2020-09-24 14:41:38,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:41:38,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:41:38,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:41:38,667 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:41:38,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:41:38,788 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:41:38,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:41:38 WrapperNode [2020-09-24 14:41:38,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:41:38,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:41:38,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:41:38,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:41:38,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:41:38" (1/1) ... [2020-09-24 14:41:38,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:41:38" (1/1) ... [2020-09-24 14:41:38,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:41:38" (1/1) ... [2020-09-24 14:41:38,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:41:38" (1/1) ... [2020-09-24 14:41:38,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:41:38" (1/1) ... [2020-09-24 14:41:38,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:41:38" (1/1) ... [2020-09-24 14:41:38,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:41:38" (1/1) ... [2020-09-24 14:41:38,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:41:38,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:41:38,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:41:38,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:41:38,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:41:38" (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 14:41:39,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:41:39,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:41:39,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-09-24 14:41:39,010 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-09-24 14:41:39,010 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-09-24 14:41:39,011 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-09-24 14:41:39,012 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-09-24 14:41:39,012 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-09-24 14:41:39,012 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-09-24 14:41:39,012 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-09-24 14:41:39,013 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-09-24 14:41:39,013 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-09-24 14:41:39,013 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-09-24 14:41:39,014 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-09-24 14:41:39,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2020-09-24 14:41:39,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2020-09-24 14:41:39,015 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-09-24 14:41:39,015 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-09-24 14:41:39,015 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-09-24 14:41:39,016 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-09-24 14:41:39,016 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-09-24 14:41:39,016 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-09-24 14:41:39,016 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-09-24 14:41:39,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-09-24 14:41:39,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-09-24 14:41:39,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-09-24 14:41:39,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-09-24 14:41:39,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-09-24 14:41:39,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-09-24 14:41:39,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-09-24 14:41:39,018 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-09-24 14:41:39,018 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-09-24 14:41:39,019 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-09-24 14:41:39,019 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-09-24 14:41:39,019 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:41:39,019 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-09-24 14:41:39,019 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-09-24 14:41:39,019 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-09-24 14:41:39,020 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-09-24 14:41:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:41:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:41:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-09-24 14:41:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-09-24 14:41:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-09-24 14:41:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-09-24 14:41:39,021 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-09-24 14:41:39,021 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-09-24 14:41:39,021 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-09-24 14:41:39,021 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-09-24 14:41:39,021 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-09-24 14:41:39,021 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-09-24 14:41:39,021 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2020-09-24 14:41:39,022 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-09-24 14:41:39,022 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-09-24 14:41:39,022 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-09-24 14:41:39,022 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-09-24 14:41:39,023 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-09-24 14:41:39,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 14:41:39,023 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-09-24 14:41:39,023 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-09-24 14:41:39,023 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-09-24 14:41:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-09-24 14:41:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-09-24 14:41:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2020-09-24 14:41:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-09-24 14:41:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-09-24 14:41:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 14:41:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 14:41:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-09-24 14:41:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 14:41:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 14:41:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 14:41:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 14:41:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-09-24 14:41:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 14:41:39,027 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-09-24 14:41:39,027 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-09-24 14:41:39,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 14:41:39,028 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-09-24 14:41:39,028 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-09-24 14:41:39,028 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-09-24 14:41:39,028 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-09-24 14:41:39,029 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-09-24 14:41:39,029 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-09-24 14:41:39,029 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-09-24 14:41:39,029 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-09-24 14:41:39,029 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-09-24 14:41:39,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:41:39,030 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-09-24 14:41:39,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:41:39,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-24 14:41:39,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:41:40,152 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:41:40,153 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-24 14:41:40,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:41:40 BoogieIcfgContainer [2020-09-24 14:41:40,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:41:40,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:41:40,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:41:40,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:41:40,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:41:38" (1/3) ... [2020-09-24 14:41:40,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb1a82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:41:40, skipping insertion in model container [2020-09-24 14:41:40,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:41:38" (2/3) ... [2020-09-24 14:41:40,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb1a82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:41:40, skipping insertion in model container [2020-09-24 14:41:40,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:41:40" (3/3) ... [2020-09-24 14:41:40,177 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product37.cil.c [2020-09-24 14:41:40,188 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:41:40,199 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:41:40,219 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:41:40,248 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:41:40,248 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:41:40,248 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:41:40,248 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:41:40,248 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:41:40,249 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:41:40,249 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:41:40,249 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:41:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states. [2020-09-24 14:41:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-24 14:41:40,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:41:40,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:40,294 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:41:40,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:41:40,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1187069653, now seen corresponding path program 1 times [2020-09-24 14:41:40,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:41:40,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19818240] [2020-09-24 14:41:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:41:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:41,075 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-24 14:41:41,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:41:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:41,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 14:41:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:41,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:41:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:41,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 14:41:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:41,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 14:41:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:41,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 14:41:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:41,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-09-24 14:41:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:41,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-09-24 14:41:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:41,341 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 14:41:41,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19818240] [2020-09-24 14:41:41,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:41:41,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:41:41,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028297158] [2020-09-24 14:41:41,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:41:41,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:41:41,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:41:41,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:41:41,377 INFO L87 Difference]: Start difference. First operand 310 states. Second operand 4 states. [2020-09-24 14:41:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:41:42,623 INFO L93 Difference]: Finished difference Result 480 states and 569 transitions. [2020-09-24 14:41:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 14:41:42,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2020-09-24 14:41:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:41:42,654 INFO L225 Difference]: With dead ends: 480 [2020-09-24 14:41:42,654 INFO L226 Difference]: Without dead ends: 306 [2020-09-24 14:41:42,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:41:42,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-09-24 14:41:42,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 259. [2020-09-24 14:41:42,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-09-24 14:41:42,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 282 transitions. [2020-09-24 14:41:42,760 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 282 transitions. Word has length 148 [2020-09-24 14:41:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:41:42,761 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 282 transitions. [2020-09-24 14:41:42,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:41:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 282 transitions. [2020-09-24 14:41:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-24 14:41:42,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:41:42,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:42,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:41:42,768 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:41:42,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:41:42,768 INFO L82 PathProgramCache]: Analyzing trace with hash 988149189, now seen corresponding path program 1 times [2020-09-24 14:41:42,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:41:42,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126672216] [2020-09-24 14:41:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:41:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:43,160 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-24 14:41:43,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:41:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:43,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 14:41:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:43,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:41:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:43,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 14:41:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:43,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 14:41:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:43,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 14:41:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:43,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-24 14:41:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:43,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-09-24 14:41:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:43,299 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 14:41:43,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126672216] [2020-09-24 14:41:43,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:41:43,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 14:41:43,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91704076] [2020-09-24 14:41:43,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:41:43,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:41:43,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:41:43,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:41:43,304 INFO L87 Difference]: Start difference. First operand 259 states and 282 transitions. Second operand 5 states. [2020-09-24 14:41:43,918 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-24 14:41:44,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:41:44,926 INFO L93 Difference]: Finished difference Result 409 states and 464 transitions. [2020-09-24 14:41:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 14:41:44,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2020-09-24 14:41:44,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:41:44,932 INFO L225 Difference]: With dead ends: 409 [2020-09-24 14:41:44,932 INFO L226 Difference]: Without dead ends: 295 [2020-09-24 14:41:44,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:41:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-09-24 14:41:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 249. [2020-09-24 14:41:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-09-24 14:41:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 269 transitions. [2020-09-24 14:41:44,973 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 269 transitions. Word has length 149 [2020-09-24 14:41:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:41:44,974 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 269 transitions. [2020-09-24 14:41:44,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:41:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 269 transitions. [2020-09-24 14:41:44,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-24 14:41:44,977 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:41:44,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:44,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:41:44,977 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:41:44,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:41:44,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1661669589, now seen corresponding path program 1 times [2020-09-24 14:41:44,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:41:44,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960127563] [2020-09-24 14:41:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:41:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:45,495 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-24 14:41:45,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:41:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:45,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 14:41:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:45,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:41:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:45,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 14:41:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:45,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 14:41:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:45,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 14:41:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:45,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-09-24 14:41:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:45,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-09-24 14:41:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:45,761 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 14:41:45,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960127563] [2020-09-24 14:41:45,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:41:45,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 14:41:45,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514642579] [2020-09-24 14:41:45,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 14:41:45,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:41:45,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 14:41:45,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:41:45,769 INFO L87 Difference]: Start difference. First operand 249 states and 269 transitions. Second operand 10 states. [2020-09-24 14:41:46,321 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-24 14:41:46,747 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-24 14:41:47,086 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-24 14:41:47,417 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-24 14:41:47,724 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 14:41:48,039 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-24 14:41:49,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:41:49,676 INFO L93 Difference]: Finished difference Result 429 states and 490 transitions. [2020-09-24 14:41:49,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 14:41:49,677 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 158 [2020-09-24 14:41:49,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:41:49,681 INFO L225 Difference]: With dead ends: 429 [2020-09-24 14:41:49,681 INFO L226 Difference]: Without dead ends: 295 [2020-09-24 14:41:49,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:41:49,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-09-24 14:41:49,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 249. [2020-09-24 14:41:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-09-24 14:41:49,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 268 transitions. [2020-09-24 14:41:49,723 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 268 transitions. Word has length 158 [2020-09-24 14:41:49,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:41:49,723 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 268 transitions. [2020-09-24 14:41:49,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 14:41:49,724 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 268 transitions. [2020-09-24 14:41:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-09-24 14:41:49,726 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:41:49,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:49,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:41:49,727 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:41:49,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:41:49,727 INFO L82 PathProgramCache]: Analyzing trace with hash -799133163, now seen corresponding path program 1 times [2020-09-24 14:41:49,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:41:49,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646681161] [2020-09-24 14:41:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:41:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:50,092 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-24 14:41:50,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:41:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:50,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 14:41:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:50,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:41:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:50,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 14:41:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:50,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 14:41:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:50,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 14:41:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:50,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-24 14:41:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:50,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:41:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:50,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:41:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:50,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-24 14:41:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:50,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-24 14:41:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:50,255 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 14:41:50,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646681161] [2020-09-24 14:41:50,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:41:50,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 14:41:50,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102298990] [2020-09-24 14:41:50,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:41:50,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:41:50,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:41:50,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:41:50,258 INFO L87 Difference]: Start difference. First operand 249 states and 268 transitions. Second operand 7 states. [2020-09-24 14:41:50,904 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-24 14:41:52,697 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-24 14:41:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:41:53,545 INFO L93 Difference]: Finished difference Result 568 states and 657 transitions. [2020-09-24 14:41:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 14:41:53,546 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 171 [2020-09-24 14:41:53,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:41:53,550 INFO L225 Difference]: With dead ends: 568 [2020-09-24 14:41:53,551 INFO L226 Difference]: Without dead ends: 434 [2020-09-24 14:41:53,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:41:53,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-09-24 14:41:53,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 363. [2020-09-24 14:41:53,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-09-24 14:41:53,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 393 transitions. [2020-09-24 14:41:53,605 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 393 transitions. Word has length 171 [2020-09-24 14:41:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:41:53,606 INFO L479 AbstractCegarLoop]: Abstraction has 363 states and 393 transitions. [2020-09-24 14:41:53,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:41:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 393 transitions. [2020-09-24 14:41:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-09-24 14:41:53,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:41:53,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:53,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:41:53,609 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:41:53,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:41:53,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1997051392, now seen corresponding path program 1 times [2020-09-24 14:41:53,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:41:53,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616340672] [2020-09-24 14:41:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:41:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:54,000 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-24 14:41:54,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:41:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:54,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 14:41:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:54,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:41:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:54,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 14:41:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:54,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 14:41:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:54,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 14:41:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:54,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-24 14:41:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:54,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:41:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:54,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:41:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:54,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:41:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:54,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 14:41:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:54,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-09-24 14:41:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:54,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-09-24 14:41:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:41:54,263 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 14:41:54,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616340672] [2020-09-24 14:41:54,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:41:54,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 14:41:54,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672246449] [2020-09-24 14:41:54,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 14:41:54,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:41:54,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 14:41:54,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:41:54,267 INFO L87 Difference]: Start difference. First operand 363 states and 393 transitions. Second operand 10 states. [2020-09-24 14:41:54,787 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-24 14:41:56,285 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-24 14:41:56,528 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 14:41:56,875 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-24 14:41:57,176 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-24 14:41:57,488 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 14:41:57,787 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-24 14:41:58,062 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-24 14:41:58,479 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-24 14:41:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:41:59,828 INFO L93 Difference]: Finished difference Result 923 states and 1078 transitions. [2020-09-24 14:41:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:41:59,829 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 195 [2020-09-24 14:41:59,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:41:59,834 INFO L225 Difference]: With dead ends: 923 [2020-09-24 14:41:59,835 INFO L226 Difference]: Without dead ends: 675 [2020-09-24 14:41:59,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2020-09-24 14:41:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-09-24 14:41:59,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 565. [2020-09-24 14:41:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2020-09-24 14:41:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 617 transitions. [2020-09-24 14:41:59,913 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 617 transitions. Word has length 195 [2020-09-24 14:41:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:41:59,914 INFO L479 AbstractCegarLoop]: Abstraction has 565 states and 617 transitions. [2020-09-24 14:41:59,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 14:41:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 617 transitions. [2020-09-24 14:41:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-09-24 14:41:59,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:41:59,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:59,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:41:59,918 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:41:59,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:41:59,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1721708242, now seen corresponding path program 1 times [2020-09-24 14:41:59,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:41:59,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344260542] [2020-09-24 14:41:59,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:41:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,284 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-24 14:42:00,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:42:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 14:42:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:42:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 14:42:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 14:42:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 14:42:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-09-24 14:42:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-24 14:42:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:42:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 14:42:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-24 14:42:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-24 14:42:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:00,523 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 14:42:00,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344260542] [2020-09-24 14:42:00,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:42:00,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 14:42:00,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539032585] [2020-09-24 14:42:00,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 14:42:00,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:42:00,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 14:42:00,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:42:00,526 INFO L87 Difference]: Start difference. First operand 565 states and 617 transitions. Second operand 11 states. [2020-09-24 14:42:01,131 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-24 14:42:02,775 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-24 14:42:03,055 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 14:42:03,337 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-24 14:42:03,701 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-24 14:42:04,023 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-24 14:42:04,373 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 14:42:04,687 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-24 14:42:05,054 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-24 14:42:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:42:06,194 INFO L93 Difference]: Finished difference Result 1186 states and 1371 transitions. [2020-09-24 14:42:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 14:42:06,195 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 200 [2020-09-24 14:42:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:42:06,200 INFO L225 Difference]: With dead ends: 1186 [2020-09-24 14:42:06,200 INFO L226 Difference]: Without dead ends: 736 [2020-09-24 14:42:06,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2020-09-24 14:42:06,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2020-09-24 14:42:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 563. [2020-09-24 14:42:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-09-24 14:42:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 613 transitions. [2020-09-24 14:42:06,290 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 613 transitions. Word has length 200 [2020-09-24 14:42:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:42:06,291 INFO L479 AbstractCegarLoop]: Abstraction has 563 states and 613 transitions. [2020-09-24 14:42:06,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 14:42:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 613 transitions. [2020-09-24 14:42:06,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-24 14:42:06,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:42:06,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:06,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:42:06,297 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:42:06,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:42:06,298 INFO L82 PathProgramCache]: Analyzing trace with hash -383352913, now seen corresponding path program 1 times [2020-09-24 14:42:06,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:42:06,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950948627] [2020-09-24 14:42:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:42:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,662 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-24 14:42:06,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:42:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 14:42:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:42:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 14:42:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 14:42:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 14:42:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-09-24 14:42:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-24 14:42:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:42:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 14:42:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 14:42:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-09-24 14:42:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:06,883 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 14:42:06,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950948627] [2020-09-24 14:42:06,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:42:06,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 14:42:06,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532323771] [2020-09-24 14:42:06,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 14:42:06,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:42:06,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 14:42:06,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:42:06,887 INFO L87 Difference]: Start difference. First operand 563 states and 613 transitions. Second operand 11 states. [2020-09-24 14:42:08,140 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-24 14:42:08,476 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-24 14:42:08,815 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-09-24 14:42:09,122 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-24 14:42:09,400 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-24 14:42:09,704 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-24 14:42:10,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:42:10,960 INFO L93 Difference]: Finished difference Result 1194 states and 1385 transitions. [2020-09-24 14:42:10,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 14:42:10,961 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 201 [2020-09-24 14:42:10,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:42:10,965 INFO L225 Difference]: With dead ends: 1194 [2020-09-24 14:42:10,966 INFO L226 Difference]: Without dead ends: 746 [2020-09-24 14:42:10,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-24 14:42:10,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2020-09-24 14:42:11,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 579. [2020-09-24 14:42:11,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-09-24 14:42:11,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 629 transitions. [2020-09-24 14:42:11,057 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 629 transitions. Word has length 201 [2020-09-24 14:42:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:42:11,057 INFO L479 AbstractCegarLoop]: Abstraction has 579 states and 629 transitions. [2020-09-24 14:42:11,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 14:42:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 629 transitions. [2020-09-24 14:42:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-24 14:42:11,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:42:11,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:11,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 14:42:11,060 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:42:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:42:11,061 INFO L82 PathProgramCache]: Analyzing trace with hash -508557297, now seen corresponding path program 1 times [2020-09-24 14:42:11,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:42:11,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738435194] [2020-09-24 14:42:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:42:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,404 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-24 14:42:11,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:42:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 14:42:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:42:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 14:42:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 14:42:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 14:42:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-09-24 14:42:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-24 14:42:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:42:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 14:42:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 14:42:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-09-24 14:42:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:11,689 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 14:42:11,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738435194] [2020-09-24 14:42:11,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:42:11,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-24 14:42:11,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41312410] [2020-09-24 14:42:11,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 14:42:11,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:42:11,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 14:42:11,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:42:11,692 INFO L87 Difference]: Start difference. First operand 579 states and 629 transitions. Second operand 14 states. [2020-09-24 14:42:12,357 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-24 14:42:12,666 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-24 14:42:12,973 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-24 14:42:13,267 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-24 14:42:13,509 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-24 14:42:14,460 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-24 14:42:14,758 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-24 14:42:15,072 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-24 14:42:15,390 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-24 14:42:15,692 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-09-24 14:42:17,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:42:17,156 INFO L93 Difference]: Finished difference Result 1232 states and 1441 transitions. [2020-09-24 14:42:17,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 14:42:17,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 201 [2020-09-24 14:42:17,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:42:17,162 INFO L225 Difference]: With dead ends: 1232 [2020-09-24 14:42:17,162 INFO L226 Difference]: Without dead ends: 768 [2020-09-24 14:42:17,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2020-09-24 14:42:17,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-09-24 14:42:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 591. [2020-09-24 14:42:17,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-09-24 14:42:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 641 transitions. [2020-09-24 14:42:17,241 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 641 transitions. Word has length 201 [2020-09-24 14:42:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:42:17,242 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 641 transitions. [2020-09-24 14:42:17,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 14:42:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 641 transitions. [2020-09-24 14:42:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-24 14:42:17,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:42:17,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:17,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 14:42:17,244 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:42:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:42:17,245 INFO L82 PathProgramCache]: Analyzing trace with hash 181936844, now seen corresponding path program 1 times [2020-09-24 14:42:17,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:42:17,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159464750] [2020-09-24 14:42:17,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:42:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,608 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-24 14:42:17,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:42:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 14:42:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:42:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 14:42:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 14:42:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 14:42:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-09-24 14:42:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-24 14:42:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:42:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 14:42:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 14:42:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-09-24 14:42:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:17,953 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 14:42:17,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159464750] [2020-09-24 14:42:17,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:42:17,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 14:42:17,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361443249] [2020-09-24 14:42:17,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:42:17,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:42:17,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:42:17,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:42:17,957 INFO L87 Difference]: Start difference. First operand 591 states and 641 transitions. Second operand 8 states. [2020-09-24 14:42:18,528 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-24 14:42:19,220 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-24 14:42:21,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:42:21,585 INFO L93 Difference]: Finished difference Result 1713 states and 2054 transitions. [2020-09-24 14:42:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 14:42:21,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 201 [2020-09-24 14:42:21,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:42:21,593 INFO L225 Difference]: With dead ends: 1713 [2020-09-24 14:42:21,593 INFO L226 Difference]: Without dead ends: 1237 [2020-09-24 14:42:21,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:42:21,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2020-09-24 14:42:21,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1005. [2020-09-24 14:42:21,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1005 states. [2020-09-24 14:42:21,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1123 transitions. [2020-09-24 14:42:21,715 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1123 transitions. Word has length 201 [2020-09-24 14:42:21,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:42:21,716 INFO L479 AbstractCegarLoop]: Abstraction has 1005 states and 1123 transitions. [2020-09-24 14:42:21,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:42:21,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1123 transitions. [2020-09-24 14:42:21,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-09-24 14:42:21,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:42:21,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:21,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 14:42:21,719 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:42:21,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:42:21,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1993479750, now seen corresponding path program 1 times [2020-09-24 14:42:21,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:42:21,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354723822] [2020-09-24 14:42:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:42:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,119 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-24 14:42:22,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:42:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 14:42:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:42:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 14:42:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 14:42:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 14:42:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-24 14:42:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-09-24 14:42:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 14:42:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:42:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 14:42:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-09-24 14:42:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-09-24 14:42:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:22,323 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 14:42:22,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354723822] [2020-09-24 14:42:22,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:42:22,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 14:42:22,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800457033] [2020-09-24 14:42:22,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:42:22,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:42:22,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:42:22,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:42:22,326 INFO L87 Difference]: Start difference. First operand 1005 states and 1123 transitions. Second operand 8 states. [2020-09-24 14:42:22,838 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-24 14:42:25,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:42:25,483 INFO L93 Difference]: Finished difference Result 1937 states and 2319 transitions. [2020-09-24 14:42:25,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 14:42:25,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 206 [2020-09-24 14:42:25,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:42:25,493 INFO L225 Difference]: With dead ends: 1937 [2020-09-24 14:42:25,494 INFO L226 Difference]: Without dead ends: 1934 [2020-09-24 14:42:25,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2020-09-24 14:42:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2020-09-24 14:42:25,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 1592. [2020-09-24 14:42:25,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1592 states. [2020-09-24 14:42:25,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1801 transitions. [2020-09-24 14:42:25,708 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1801 transitions. Word has length 206 [2020-09-24 14:42:25,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:42:25,709 INFO L479 AbstractCegarLoop]: Abstraction has 1592 states and 1801 transitions. [2020-09-24 14:42:25,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:42:25,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1801 transitions. [2020-09-24 14:42:25,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-09-24 14:42:25,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:42:25,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:25,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 14:42:25,716 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:42:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:42:25,716 INFO L82 PathProgramCache]: Analyzing trace with hash 662776015, now seen corresponding path program 1 times [2020-09-24 14:42:25,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:42:25,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608402021] [2020-09-24 14:42:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:42:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,107 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-24 14:42:26,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:42:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 14:42:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:42:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 14:42:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 14:42:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 14:42:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-24 14:42:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-09-24 14:42:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-24 14:42:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:42:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 14:42:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-24 14:42:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:42:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2020-09-24 14:42:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2020-09-24 14:42:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-24 14:42:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 14:42:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 14:42:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-09-24 14:42:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2020-09-24 14:42:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:42:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-24 14:42:26,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608402021] [2020-09-24 14:42:26,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:42:26,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 14:42:26,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823584519] [2020-09-24 14:42:26,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 14:42:26,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:42:26,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 14:42:26,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:42:26,567 INFO L87 Difference]: Start difference. First operand 1592 states and 1801 transitions. Second operand 22 states. [2020-09-24 14:42:27,169 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-24 14:42:27,629 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 14:42:27,963 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-24 14:42:28,291 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-24 14:42:28,621 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-09-24 14:42:28,941 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-09-24 14:42:30,070 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-09-24 14:42:31,739 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-24 14:42:32,092 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-09-24 14:42:32,510 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-09-24 14:42:32,834 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 193