/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product56.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:41:17,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:41:17,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:41:17,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:41:17,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:41:17,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:41:17,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:41:17,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:41:17,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:41:17,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:41:17,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:41:17,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:41:17,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:41:17,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:41:17,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:41:17,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:41:17,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:41:17,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:41:17,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:41:17,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:41:17,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:41:17,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:41:17,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:41:17,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:41:17,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:41:17,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:41:17,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:41:17,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:41:17,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:41:17,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:41:17,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:41:17,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:41:17,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:41:17,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:41:17,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:41:17,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:41:17,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:41:17,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:41:17,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:41:17,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:41:17,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:41:17,694 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 [2020-08-18 21:41:17,732 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:41:17,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:41:17,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:41:17,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:41:17,734 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:41:17,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:41:17,734 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:41:17,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:41:17,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:41:17,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:41:17,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:41:17,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:41:17,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:41:17,739 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:41:17,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:41:17,739 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:41:17,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:41:17,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:41:17,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:41:17,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:41:17,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:41:17,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:41:17,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:41:17,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:41:17,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:41:17,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:41:17,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:41:17,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:41:17,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:41:17,745 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 21:41:18,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:41:18,036 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:41:18,039 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:41:18,041 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:41:18,041 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:41:18,042 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product56.cil.c [2020-08-18 21:41:18,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62bbb7aec/ac38f869f9ea4974ab06421d25b2a035/FLAG7c520bb33 [2020-08-18 21:41:18,608 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:41:18,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product56.cil.c [2020-08-18 21:41:18,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62bbb7aec/ac38f869f9ea4974ab06421d25b2a035/FLAG7c520bb33 [2020-08-18 21:41:18,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62bbb7aec/ac38f869f9ea4974ab06421d25b2a035 [2020-08-18 21:41:18,884 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:41:18,886 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:41:18,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:41:18,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:41:18,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:41:18,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:41:18" (1/1) ... [2020-08-18 21:41:18,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f9a5625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:41:18, skipping insertion in model container [2020-08-18 21:41:18,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:41:18" (1/1) ... [2020-08-18 21:41:18,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:41:18,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:41:19,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:41:19,310 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:41:19,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:41:19,569 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:41:19,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:41:19 WrapperNode [2020-08-18 21:41:19,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:41:19,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:41:19,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:41:19,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:41:19,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:41:19" (1/1) ... [2020-08-18 21:41:19,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:41:19" (1/1) ... [2020-08-18 21:41:19,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:41:19" (1/1) ... [2020-08-18 21:41:19,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:41:19" (1/1) ... [2020-08-18 21:41:19,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:41:19" (1/1) ... [2020-08-18 21:41:19,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:41:19" (1/1) ... [2020-08-18 21:41:19,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:41:19" (1/1) ... [2020-08-18 21:41:19,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:41:19,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:41:19,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:41:19,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:41:19,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:41:19" (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 [2020-08-18 21:41:19,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:41:19,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:41:19,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 21:41:19,775 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 21:41:19,775 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 21:41:19,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 21:41:19,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 21:41:19,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 21:41:19,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 21:41:19,777 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 21:41:19,778 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 21:41:19,778 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 21:41:19,778 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 21:41:19,779 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 21:41:19,779 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 21:41:19,780 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 21:41:19,780 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 21:41:19,780 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 21:41:19,781 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 21:41:19,781 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 21:41:19,781 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 21:41:19,781 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 21:41:19,781 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 21:41:19,782 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 21:41:19,782 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 21:41:19,783 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 21:41:19,783 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 21:41:19,783 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 21:41:19,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 21:41:19,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 21:41:19,784 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 21:41:19,784 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 21:41:19,784 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 21:41:19,784 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 21:41:19,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:41:19,785 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 21:41:19,785 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 21:41:19,785 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 21:41:19,785 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 21:41:19,785 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 21:41:19,786 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 21:41:19,786 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 21:41:19,786 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 21:41:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:41:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:41:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 21:41:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 21:41:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 21:41:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 21:41:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 21:41:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 21:41:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 21:41:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 21:41:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 21:41:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 21:41:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:41:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 21:41:19,792 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 21:41:19,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 21:41:19,792 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 21:41:19,792 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 21:41:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 21:41:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 21:41:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 21:41:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 21:41:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 21:41:19,793 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 21:41:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 21:41:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 21:41:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 21:41:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 21:41:19,794 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 21:41:19,795 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 21:41:19,795 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 21:41:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 21:41:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 21:41:19,796 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 21:41:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 21:41:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 21:41:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 21:41:19,797 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 21:41:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 21:41:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 21:41:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 21:41:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 21:41:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 21:41:19,798 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 21:41:19,799 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 21:41:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 21:41:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 21:41:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 21:41:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 21:41:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 21:41:19,800 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 21:41:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 21:41:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:41:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 21:41:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:41:19,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 21:41:19,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:41:20,953 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:41:20,953 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 21:41:20,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:41:20 BoogieIcfgContainer [2020-08-18 21:41:20,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:41:20,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:41:20,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:41:20,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:41:20,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:41:18" (1/3) ... [2020-08-18 21:41:20,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b6ab9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:41:20, skipping insertion in model container [2020-08-18 21:41:20,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:41:19" (2/3) ... [2020-08-18 21:41:20,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b6ab9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:41:20, skipping insertion in model container [2020-08-18 21:41:20,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:41:20" (3/3) ... [2020-08-18 21:41:20,967 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product56.cil.c [2020-08-18 21:41:20,978 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:41:20,986 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:41:21,000 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:41:21,025 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:41:21,025 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:41:21,025 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:41:21,025 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:41:21,026 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:41:21,026 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:41:21,026 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:41:21,026 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:41:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states. [2020-08-18 21:41:21,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 21:41:21,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:21,061 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] [2020-08-18 21:41:21,062 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:21,068 INFO L82 PathProgramCache]: Analyzing trace with hash 733672736, now seen corresponding path program 1 times [2020-08-18 21:41:21,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:21,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229428180] [2020-08-18 21:41:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:21,728 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:21,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:21,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:21,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:21,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:21,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:21,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:41:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:21,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 21:41:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:41:21,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229428180] [2020-08-18 21:41:21,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:41:21,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:41:21,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609182992] [2020-08-18 21:41:21,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:41:21,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:21,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:41:21,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:41:21,909 INFO L87 Difference]: Start difference. First operand 196 states. Second operand 3 states. [2020-08-18 21:41:23,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:23,287 INFO L93 Difference]: Finished difference Result 352 states and 460 transitions. [2020-08-18 21:41:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:41:23,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 21:41:23,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:23,310 INFO L225 Difference]: With dead ends: 352 [2020-08-18 21:41:23,310 INFO L226 Difference]: Without dead ends: 190 [2020-08-18 21:41:23,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:41:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-18 21:41:23,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 153. [2020-08-18 21:41:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-08-18 21:41:23,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2020-08-18 21:41:23,434 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 46 [2020-08-18 21:41:23,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:23,434 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2020-08-18 21:41:23,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:41:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2020-08-18 21:41:23,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 21:41:23,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:23,438 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] [2020-08-18 21:41:23,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:41:23,439 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:23,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:23,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1141201306, now seen corresponding path program 1 times [2020-08-18 21:41:23,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:23,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679996236] [2020-08-18 21:41:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:23,736 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:23,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:23,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:23,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:23,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:23,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:23,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 21:41:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:23,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:41:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:41:23,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679996236] [2020-08-18 21:41:23,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:41:23,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:41:23,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019847579] [2020-08-18 21:41:23,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:41:23,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:23,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:41:23,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:41:23,783 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand 4 states. [2020-08-18 21:41:24,271 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:25,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:25,252 INFO L93 Difference]: Finished difference Result 275 states and 339 transitions. [2020-08-18 21:41:25,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:41:25,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 21:41:25,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:25,257 INFO L225 Difference]: With dead ends: 275 [2020-08-18 21:41:25,257 INFO L226 Difference]: Without dead ends: 174 [2020-08-18 21:41:25,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:41:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-18 21:41:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 144. [2020-08-18 21:41:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-18 21:41:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2020-08-18 21:41:25,304 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 47 [2020-08-18 21:41:25,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:25,305 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2020-08-18 21:41:25,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:41:25,305 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2020-08-18 21:41:25,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 21:41:25,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:25,307 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] [2020-08-18 21:41:25,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:41:25,308 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1705860394, now seen corresponding path program 1 times [2020-08-18 21:41:25,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:25,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277227945] [2020-08-18 21:41:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:25,611 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:25,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:25,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:25,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:25,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:25,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:25,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 21:41:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:25,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 21:41:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:41:25,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277227945] [2020-08-18 21:41:25,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:41:25,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 21:41:25,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092273571] [2020-08-18 21:41:25,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:41:25,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:25,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:41:25,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:41:25,728 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand 8 states. [2020-08-18 21:41:26,111 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:26,379 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:26,619 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:26,871 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:27,629 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:29,846 INFO L93 Difference]: Finished difference Result 491 states and 613 transitions. [2020-08-18 21:41:29,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:41:29,847 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-18 21:41:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:29,855 INFO L225 Difference]: With dead ends: 491 [2020-08-18 21:41:29,855 INFO L226 Difference]: Without dead ends: 371 [2020-08-18 21:41:29,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:41:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-08-18 21:41:29,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 302. [2020-08-18 21:41:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-08-18 21:41:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 368 transitions. [2020-08-18 21:41:29,969 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 368 transitions. Word has length 52 [2020-08-18 21:41:29,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:29,969 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 368 transitions. [2020-08-18 21:41:29,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:41:29,970 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 368 transitions. [2020-08-18 21:41:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 21:41:29,972 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:29,972 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] [2020-08-18 21:41:29,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:41:29,973 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:29,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:29,973 INFO L82 PathProgramCache]: Analyzing trace with hash -986744431, now seen corresponding path program 1 times [2020-08-18 21:41:29,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:29,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548747352] [2020-08-18 21:41:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:30,250 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:30,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:30,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:30,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:30,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:30,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:30,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 21:41:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:30,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 21:41:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:30,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 21:41:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:41:30,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548747352] [2020-08-18 21:41:30,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:41:30,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 21:41:30,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072436322] [2020-08-18 21:41:30,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:41:30,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:30,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:41:30,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:41:30,332 INFO L87 Difference]: Start difference. First operand 302 states and 368 transitions. Second operand 8 states. [2020-08-18 21:41:30,685 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:31,550 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:31,989 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:32,230 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:32,467 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:33,093 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:34,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:34,197 INFO L93 Difference]: Finished difference Result 975 states and 1267 transitions. [2020-08-18 21:41:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:41:34,197 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 21:41:34,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:34,206 INFO L225 Difference]: With dead ends: 975 [2020-08-18 21:41:34,206 INFO L226 Difference]: Without dead ends: 697 [2020-08-18 21:41:34,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:41:34,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-08-18 21:41:34,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 559. [2020-08-18 21:41:34,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-08-18 21:41:34,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 686 transitions. [2020-08-18 21:41:34,346 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 686 transitions. Word has length 57 [2020-08-18 21:41:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:34,347 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 686 transitions. [2020-08-18 21:41:34,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:41:34,347 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 686 transitions. [2020-08-18 21:41:34,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 21:41:34,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:34,350 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] [2020-08-18 21:41:34,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:41:34,350 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:34,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:34,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1925248939, now seen corresponding path program 1 times [2020-08-18 21:41:34,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:34,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123387189] [2020-08-18 21:41:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:34,649 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:34,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:34,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:34,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:34,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:34,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:34,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:41:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:34,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:41:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:34,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 21:41:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:34,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 21:41:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:41:34,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123387189] [2020-08-18 21:41:34,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:41:34,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 21:41:34,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333346786] [2020-08-18 21:41:34,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:41:34,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:34,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:41:34,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:41:34,743 INFO L87 Difference]: Start difference. First operand 559 states and 686 transitions. Second operand 9 states. [2020-08-18 21:41:35,122 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:36,062 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:36,361 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:36,593 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:37,201 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:37,496 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:38,688 INFO L93 Difference]: Finished difference Result 1553 states and 2084 transitions. [2020-08-18 21:41:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 21:41:38,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-18 21:41:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:38,697 INFO L225 Difference]: With dead ends: 1553 [2020-08-18 21:41:38,697 INFO L226 Difference]: Without dead ends: 1018 [2020-08-18 21:41:38,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 21:41:38,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2020-08-18 21:41:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 831. [2020-08-18 21:41:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2020-08-18 21:41:38,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1023 transitions. [2020-08-18 21:41:38,861 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1023 transitions. Word has length 61 [2020-08-18 21:41:38,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:38,861 INFO L479 AbstractCegarLoop]: Abstraction has 831 states and 1023 transitions. [2020-08-18 21:41:38,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:41:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1023 transitions. [2020-08-18 21:41:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 21:41:38,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:38,864 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] [2020-08-18 21:41:38,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:41:38,865 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:38,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:38,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1051920088, now seen corresponding path program 1 times [2020-08-18 21:41:38,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:38,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164633369] [2020-08-18 21:41:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,139 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:39,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:41:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 21:41:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:41:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 21:41:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 21:41:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:41:39,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164633369] [2020-08-18 21:41:39,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:41:39,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 21:41:39,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815979442] [2020-08-18 21:41:39,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:41:39,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:39,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:41:39,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:41:39,340 INFO L87 Difference]: Start difference. First operand 831 states and 1023 transitions. Second operand 9 states. [2020-08-18 21:41:40,343 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:40,580 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 21:41:40,834 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:41,088 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:42,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:42,195 INFO L93 Difference]: Finished difference Result 1901 states and 2517 transitions. [2020-08-18 21:41:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:41:42,196 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-08-18 21:41:42,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:42,206 INFO L225 Difference]: With dead ends: 1901 [2020-08-18 21:41:42,206 INFO L226 Difference]: Without dead ends: 1094 [2020-08-18 21:41:42,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:41:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2020-08-18 21:41:42,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 857. [2020-08-18 21:41:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 857 states. [2020-08-18 21:41:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1051 transitions. [2020-08-18 21:41:42,428 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1051 transitions. Word has length 89 [2020-08-18 21:41:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:42,428 INFO L479 AbstractCegarLoop]: Abstraction has 857 states and 1051 transitions. [2020-08-18 21:41:42,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:41:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1051 transitions. [2020-08-18 21:41:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 21:41:42,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:42,432 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] [2020-08-18 21:41:42,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:41:42,433 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:42,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1326679702, now seen corresponding path program 1 times [2020-08-18 21:41:42,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:42,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098648401] [2020-08-18 21:41:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:42,780 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:42,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:42,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:42,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:42,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:42,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:42,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:41:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:42,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 21:41:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:42,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:42,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:42,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:42,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:42,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:41:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:42,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 21:41:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:42,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 21:41:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:41:43,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098648401] [2020-08-18 21:41:43,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:41:43,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 21:41:43,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882041718] [2020-08-18 21:41:43,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 21:41:43,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:43,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 21:41:43,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:41:43,034 INFO L87 Difference]: Start difference. First operand 857 states and 1051 transitions. Second operand 11 states. [2020-08-18 21:41:43,656 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 21:41:43,941 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:44,208 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:44,964 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:45,233 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:45,476 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 21:41:46,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:46,810 INFO L93 Difference]: Finished difference Result 1955 states and 2636 transitions. [2020-08-18 21:41:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:41:46,813 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 89 [2020-08-18 21:41:46,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:46,820 INFO L225 Difference]: With dead ends: 1955 [2020-08-18 21:41:46,820 INFO L226 Difference]: Without dead ends: 1122 [2020-08-18 21:41:46,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 21:41:46,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2020-08-18 21:41:46,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 873. [2020-08-18 21:41:46,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 873 states. [2020-08-18 21:41:46,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1067 transitions. [2020-08-18 21:41:46,991 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1067 transitions. Word has length 89 [2020-08-18 21:41:46,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:46,991 INFO L479 AbstractCegarLoop]: Abstraction has 873 states and 1067 transitions. [2020-08-18 21:41:46,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 21:41:46,991 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1067 transitions. [2020-08-18 21:41:46,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 21:41:47,000 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:47,000 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] [2020-08-18 21:41:47,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:41:47,000 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:47,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1017987339, now seen corresponding path program 1 times [2020-08-18 21:41:47,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:47,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914600419] [2020-08-18 21:41:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,233 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 21:41:47,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:41:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:41:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 21:41:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:41:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 21:41:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:41:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 21:41:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 21:41:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 21:41:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:41:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 21:41:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 21:41:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:41:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:41:47,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914600419] [2020-08-18 21:41:47,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:41:47,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 21:41:47,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745221868] [2020-08-18 21:41:47,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:41:47,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:41:47,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:41:47,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:41:47,399 INFO L87 Difference]: Start difference. First operand 873 states and 1067 transitions. Second operand 7 states. [2020-08-18 21:41:47,719 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:48,164 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 21:41:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:41:51,001 INFO L93 Difference]: Finished difference Result 2923 states and 3961 transitions. [2020-08-18 21:41:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:41:51,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 89 [2020-08-18 21:41:51,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:41:51,016 INFO L225 Difference]: With dead ends: 2923 [2020-08-18 21:41:51,016 INFO L226 Difference]: Without dead ends: 2074 [2020-08-18 21:41:51,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:41:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2020-08-18 21:41:51,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1751. [2020-08-18 21:41:51,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1751 states. [2020-08-18 21:41:51,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2157 transitions. [2020-08-18 21:41:51,351 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2157 transitions. Word has length 89 [2020-08-18 21:41:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:41:51,352 INFO L479 AbstractCegarLoop]: Abstraction has 1751 states and 2157 transitions. [2020-08-18 21:41:51,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:41:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2157 transitions. [2020-08-18 21:41:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 21:41:51,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:41:51,355 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] [2020-08-18 21:41:51,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:41:51,355 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:41:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:41:51,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1174397627, now seen corresponding path program 1 times [2020-08-18 21:41:51,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:41:51,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952876630] [2020-08-18 21:41:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:41:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:41:51,420 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:41:51,420 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:41:51,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:41:51,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:41:51 BoogieIcfgContainer [2020-08-18 21:41:51,463 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:41:51,465 INFO L168 Benchmark]: Toolchain (without parser) took 32579.52 ms. Allocated memory was 140.0 MB in the beginning and 630.2 MB in the end (delta: 490.2 MB). Free memory was 101.7 MB in the beginning and 155.0 MB in the end (delta: -53.3 MB). Peak memory consumption was 436.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:51,465 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 21:41:51,466 INFO L168 Benchmark]: CACSL2BoogieTranslator took 683.28 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 101.5 MB in the beginning and 172.9 MB in the end (delta: -71.4 MB). Peak memory consumption was 29.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:51,467 INFO L168 Benchmark]: Boogie Preprocessor took 115.65 ms. Allocated memory is still 203.9 MB. Free memory was 172.2 MB in the beginning and 168.1 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:51,468 INFO L168 Benchmark]: RCFGBuilder took 1269.06 ms. Allocated memory was 203.9 MB in the beginning and 237.5 MB in the end (delta: 33.6 MB). Free memory was 168.1 MB in the beginning and 194.7 MB in the end (delta: -26.6 MB). Peak memory consumption was 83.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:51,468 INFO L168 Benchmark]: TraceAbstraction took 30503.44 ms. Allocated memory was 237.5 MB in the beginning and 630.2 MB in the end (delta: 392.7 MB). Free memory was 194.7 MB in the beginning and 155.0 MB in the end (delta: 39.7 MB). Peak memory consumption was 432.4 MB. Max. memory is 7.1 GB. [2020-08-18 21:41:51,471 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 683.28 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 101.5 MB in the beginning and 172.9 MB in the end (delta: -71.4 MB). Peak memory consumption was 29.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.65 ms. Allocated memory is still 203.9 MB. Free memory was 172.2 MB in the beginning and 168.1 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1269.06 ms. Allocated memory was 203.9 MB in the beginning and 237.5 MB in the end (delta: 33.6 MB). Free memory was 168.1 MB in the beginning and 194.7 MB in the end (delta: -26.6 MB). Peak memory consumption was 83.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30503.44 ms. Allocated memory was 237.5 MB in the beginning and 630.2 MB in the end (delta: 392.7 MB). Free memory was 194.7 MB in the beginning and 155.0 MB in the end (delta: 39.7 MB). Peak memory consumption was 432.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 806]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L209] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L490] int pumpRunning = 0; [L491] int systemActive = 1; [L811] int cleanupTimeShifts = 4; [L908] int waterLevel = 1; [L909] int methaneLevelCritical = 0; [L884] int retValue_acc ; [L885] int tmp ; [L889] FCALL select_helpers() [L890] FCALL select_features() [L891] CALL, EXPR valid_product() [L766] int retValue_acc ; [L769] retValue_acc = 1 [L770] return (retValue_acc); [L891] RET, EXPR valid_product() [L891] tmp = valid_product() [L893] COND TRUE \read(tmp) [L895] FCALL setup() [L896] CALL runTest() [L878] CALL test() [L413] int splverifierCounter ; [L414] int tmp ; [L415] int tmp___0 ; [L416] int tmp___1 ; [L417] int tmp___2 ; [L420] splverifierCounter = 0 [L422] COND TRUE 1 [L424] COND TRUE splverifierCounter < 4 [L430] tmp = __VERIFIER_nondet_int() [L432] COND TRUE \read(tmp) [L434] CALL waterRise() [L926] COND TRUE waterLevel < 2 [L927] waterLevel = waterLevel + 1 [L434] RET waterRise() [L440] tmp___0 = __VERIFIER_nondet_int() [L442] COND TRUE \read(tmp___0) [L444] CALL changeMethaneLevel() [L938] COND FALSE !(\read(methaneLevelCritical)) [L941] methaneLevelCritical = 1 [L444] RET changeMethaneLevel() [L450] tmp___2 = __VERIFIER_nondet_int() [L452] COND FALSE !(\read(tmp___2)) [L458] tmp___1 = __VERIFIER_nondet_int() [L460] COND FALSE !(\read(tmp___1)) [L469] CALL timeShift() [L498] COND FALSE !(\read(pumpRunning)) [L505] COND TRUE \read(systemActive) [L507] CALL processEnvironment() [L579] int tmp ; [L582] COND FALSE !(\read(pumpRunning)) [L597] CALL processEnvironment__wrappee__lowWaterSensor() [L553] int tmp ; [L556] COND FALSE !(\read(pumpRunning)) [L571] CALL processEnvironment__wrappee__highWaterSensor() [L527] int tmp ; [L530] COND TRUE ! pumpRunning [L532] CALL, EXPR isHighWaterLevel() [L676] int retValue_acc ; [L677] int tmp ; [L678] int tmp___0 ; [L682] CALL, EXPR isHighWaterSensorDry() [L988] int retValue_acc ; [L991] COND FALSE !(waterLevel < 2) [L995] retValue_acc = 0 [L996] return (retValue_acc); [L682] RET, EXPR isHighWaterSensorDry() [L682] tmp = isHighWaterSensorDry() [L684] COND FALSE !(\read(tmp)) [L687] tmp___0 = 1 [L689] retValue_acc = tmp___0 [L690] return (retValue_acc); [L532] RET, EXPR isHighWaterLevel() [L532] tmp = isHighWaterLevel() [L534] COND TRUE \read(tmp) [L536] CALL activatePump() [L607] pumpRunning = 1 [L536] RET activatePump() [L571] RET processEnvironment__wrappee__highWaterSensor() [L597] RET processEnvironment__wrappee__lowWaterSensor() [L507] RET processEnvironment() [L513] CALL __utac_acc__Specification1_spec__1() [L777] int tmp ; [L778] int tmp___0 ; [L782] CALL, EXPR isMethaneLevelCritical() [L947] int retValue_acc ; [L950] retValue_acc = methaneLevelCritical [L951] return (retValue_acc); [L782] RET, EXPR isMethaneLevelCritical() [L782] tmp = isMethaneLevelCritical() [L784] COND TRUE \read(tmp) [L786] CALL, EXPR isPumpRunning() [L631] int retValue_acc ; [L634] retValue_acc = pumpRunning [L635] return (retValue_acc); [L786] RET, EXPR isPumpRunning() [L786] tmp___0 = isPumpRunning() [L788] COND TRUE \read(tmp___0) [L790] CALL __automaton_fail() [L806] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 43 procedures, 255 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 30.4s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 25.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1133 SDtfs, 2314 SDslu, 1162 SDs, 0 SdLazy, 5904 SolverSat, 1571 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1751occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 1270 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 623 NumberOfCodeBlocks, 623 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 522 ConstructedInterpolants, 0 QuantifiedInterpolants, 159558 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...