/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:41:47,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:41:47,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:41:47,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:41:47,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:41:47,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:41:47,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:41:47,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:41:47,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:41:47,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:41:47,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:41:47,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:41:47,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:41:47,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:41:47,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:41:47,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:41:47,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:41:47,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:41:47,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:41:47,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:41:47,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:41:47,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:41:47,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:41:47,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:41:47,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:41:47,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:41:47,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:41:47,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:41:47,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:41:47,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:41:47,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:41:47,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:41:47,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:41:47,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:41:47,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:41:47,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:41:47,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:41:47,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:41:47,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:41:47,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:41:47,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:41:47,809 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 [2020-08-21 14:41:47,831 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:41:47,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:41:47,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:41:47,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:41:47,833 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:41:47,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:41:47,834 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:41:47,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:41:47,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:41:47,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:41:47,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:41:47,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:41:47,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:41:47,835 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:41:47,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:41:47,835 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:41:47,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:41:47,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:41:47,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:41:47,836 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:41:47,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:41:47,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:41:47,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:41:47,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:41:47,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:41:47,837 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:41:47,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:41:47,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:41:47,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:41:47,838 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:41:48,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:41:48,171 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:41:48,176 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:41:48,177 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:41:48,177 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:41:48,179 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-08-21 14:41:48,238 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/296be32de/abdfa5cbafc04cedadea095882171bb4/FLAG5688b27d7 [2020-08-21 14:41:48,732 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:41:48,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-08-21 14:41:48,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/296be32de/abdfa5cbafc04cedadea095882171bb4/FLAG5688b27d7 [2020-08-21 14:41:49,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/296be32de/abdfa5cbafc04cedadea095882171bb4 [2020-08-21 14:41:49,083 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:41:49,085 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:41:49,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:41:49,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:41:49,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:41:49,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b44b751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49, skipping insertion in model container [2020-08-21 14:41:49,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:41:49,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:41:49,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:41:49,625 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:41:49,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:41:49,748 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:41:49,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49 WrapperNode [2020-08-21 14:41:49,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:41:49,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:41:49,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:41:49,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:41:49,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (1/1) ... [2020-08-21 14:41:49,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:41:49,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:41:49,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:41:49,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:41:49,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (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 [2020-08-21 14:41:49,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:41:49,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:41:49,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 14:41:49,937 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 14:41:49,938 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 14:41:49,938 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 14:41:49,938 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 14:41:49,938 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 14:41:49,938 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 14:41:49,939 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 14:41:49,940 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 14:41:49,940 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 14:41:49,940 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 14:41:49,940 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 14:41:49,940 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 14:41:49,941 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 14:41:49,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 14:41:49,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 14:41:49,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 14:41:49,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 14:41:49,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 14:41:49,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 14:41:49,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 14:41:49,943 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 14:41:49,943 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 14:41:49,943 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 14:41:49,944 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 14:41:49,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-21 14:41:49,944 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 14:41:49,944 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 14:41:49,945 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 14:41:49,945 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 14:41:49,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:41:49,945 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 14:41:49,945 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 14:41:49,945 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 14:41:49,945 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 14:41:49,946 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 14:41:49,946 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 14:41:49,946 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 14:41:49,946 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 14:41:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:41:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:41:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 14:41:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 14:41:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 14:41:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 14:41:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 14:41:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 14:41:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 14:41:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 14:41:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 14:41:49,949 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 14:41:49,949 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 14:41:49,949 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 14:41:49,949 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 14:41:49,949 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 14:41:49,950 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 14:41:49,950 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 14:41:49,950 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-21 14:41:49,950 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 14:41:49,950 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 14:41:49,951 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 14:41:49,951 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 14:41:49,951 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 14:41:49,951 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 14:41:49,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 14:41:49,951 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 14:41:49,951 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 14:41:49,951 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 14:41:49,952 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 14:41:49,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 14:41:49,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 14:41:49,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 14:41:49,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 14:41:49,953 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 14:41:49,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 14:41:49,954 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 14:41:49,954 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 14:41:49,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 14:41:49,955 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 14:41:49,955 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 14:41:49,955 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 14:41:49,955 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 14:41:49,955 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 14:41:49,955 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 14:41:49,956 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 14:41:49,956 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 14:41:49,956 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 14:41:49,956 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 14:41:49,956 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 14:41:49,956 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:41:49,956 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 14:41:49,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:41:49,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 14:41:49,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:41:50,998 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:41:50,998 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 14:41:51,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:41:51 BoogieIcfgContainer [2020-08-21 14:41:51,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:41:51,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:41:51,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:41:51,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:41:51,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:41:49" (1/3) ... [2020-08-21 14:41:51,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718b9bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:41:51, skipping insertion in model container [2020-08-21 14:41:51,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:49" (2/3) ... [2020-08-21 14:41:51,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718b9bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:41:51, skipping insertion in model container [2020-08-21 14:41:51,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:41:51" (3/3) ... [2020-08-21 14:41:51,011 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product51.cil.c [2020-08-21 14:41:51,019 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:41:51,025 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:41:51,035 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:41:51,055 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:41:51,056 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:41:51,056 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:41:51,056 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:41:51,056 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:41:51,056 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:41:51,057 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:41:51,057 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:41:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-08-21 14:41:51,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 14:41:51,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:51,089 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] [2020-08-21 14:41:51,090 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:51,096 INFO L82 PathProgramCache]: Analyzing trace with hash -199381509, now seen corresponding path program 1 times [2020-08-21 14:41:51,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:51,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138660156] [2020-08-21 14:41:51,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,782 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:51,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 14:41:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 14:41:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:41:51,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138660156] [2020-08-21 14:41:51,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:51,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:41:51,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657567119] [2020-08-21 14:41:51,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:41:51,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:51,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:41:51,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:41:51,906 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 3 states. [2020-08-21 14:41:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:41:53,041 INFO L93 Difference]: Finished difference Result 311 states and 407 transitions. [2020-08-21 14:41:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:41:53,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 14:41:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:41:53,057 INFO L225 Difference]: With dead ends: 311 [2020-08-21 14:41:53,057 INFO L226 Difference]: Without dead ends: 168 [2020-08-21 14:41:53,062 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 [2020-08-21 14:41:53,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-21 14:41:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2020-08-21 14:41:53,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-21 14:41:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-08-21 14:41:53,150 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 46 [2020-08-21 14:41:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:41:53,151 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-08-21 14:41:53,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:41:53,151 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-08-21 14:41:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 14:41:53,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:53,155 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] [2020-08-21 14:41:53,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:41:53,155 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:53,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:53,156 INFO L82 PathProgramCache]: Analyzing trace with hash 822116352, now seen corresponding path program 1 times [2020-08-21 14:41:53,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:53,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756055128] [2020-08-21 14:41:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,505 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:53,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 14:41:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:41:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:41:53,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756055128] [2020-08-21 14:41:53,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:53,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:41:53,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131796120] [2020-08-21 14:41:53,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:41:53,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:53,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:41:53,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:41:53,585 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 4 states. [2020-08-21 14:41:53,952 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:41:54,785 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2020-08-21 14:41:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:41:54,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 14:41:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:41:54,789 INFO L225 Difference]: With dead ends: 238 [2020-08-21 14:41:54,789 INFO L226 Difference]: Without dead ends: 152 [2020-08-21 14:41:54,790 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 [2020-08-21 14:41:54,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-21 14:41:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2020-08-21 14:41:54,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-21 14:41:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2020-08-21 14:41:54,827 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 47 [2020-08-21 14:41:54,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:41:54,827 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2020-08-21 14:41:54,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:41:54,828 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2020-08-21 14:41:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 14:41:54,830 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:54,830 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] [2020-08-21 14:41:54,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:41:54,830 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:54,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:54,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1772796698, now seen corresponding path program 1 times [2020-08-21 14:41:54,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:54,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353606356] [2020-08-21 14:41:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:55,150 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:55,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:55,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:55,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:55,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:55,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:55,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:41:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:55,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 14:41:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:41:55,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353606356] [2020-08-21 14:41:55,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:55,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:41:55,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694383920] [2020-08-21 14:41:55,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:41:55,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:55,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:41:55,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:41:55,263 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand 8 states. [2020-08-21 14:41:55,640 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:41:55,927 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:56,191 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:56,422 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:57,092 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:41:58,738 INFO L93 Difference]: Finished difference Result 427 states and 530 transitions. [2020-08-21 14:41:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:41:58,742 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-21 14:41:58,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:41:58,746 INFO L225 Difference]: With dead ends: 427 [2020-08-21 14:41:58,746 INFO L226 Difference]: Without dead ends: 326 [2020-08-21 14:41:58,748 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 [2020-08-21 14:41:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-21 14:41:58,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 268. [2020-08-21 14:41:58,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-21 14:41:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 324 transitions. [2020-08-21 14:41:58,836 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 324 transitions. Word has length 51 [2020-08-21 14:41:58,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:41:58,836 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 324 transitions. [2020-08-21 14:41:58,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:41:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 324 transitions. [2020-08-21 14:41:58,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 14:41:58,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:58,845 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] [2020-08-21 14:41:58,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:41:58,845 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:58,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:58,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1539786498, now seen corresponding path program 1 times [2020-08-21 14:41:58,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:58,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43722937] [2020-08-21 14:41:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,163 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:59,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 14:41:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 14:41:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:41:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:41:59,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43722937] [2020-08-21 14:41:59,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:59,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:41:59,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121890909] [2020-08-21 14:41:59,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:41:59,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:59,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:41:59,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:41:59,246 INFO L87 Difference]: Start difference. First operand 268 states and 324 transitions. Second operand 8 states. [2020-08-21 14:41:59,589 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:00,577 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:00,894 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:01,187 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:01,470 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:01,887 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:02,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:02,720 INFO L93 Difference]: Finished difference Result 862 states and 1117 transitions. [2020-08-21 14:42:02,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:42:02,720 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-21 14:42:02,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:02,727 INFO L225 Difference]: With dead ends: 862 [2020-08-21 14:42:02,727 INFO L226 Difference]: Without dead ends: 618 [2020-08-21 14:42:02,730 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 [2020-08-21 14:42:02,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-21 14:42:02,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 491. [2020-08-21 14:42:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-08-21 14:42:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 598 transitions. [2020-08-21 14:42:02,869 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 598 transitions. Word has length 57 [2020-08-21 14:42:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:02,869 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 598 transitions. [2020-08-21 14:42:02,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:42:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 598 transitions. [2020-08-21 14:42:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 14:42:02,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:02,873 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] [2020-08-21 14:42:02,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:42:02,873 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:02,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1493126654, now seen corresponding path program 1 times [2020-08-21 14:42:02,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:02,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744826721] [2020-08-21 14:42:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,119 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:03,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:42:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:42:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 14:42:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 14:42:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:42:03,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744826721] [2020-08-21 14:42:03,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:03,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:42:03,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170484255] [2020-08-21 14:42:03,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:42:03,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:03,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:42:03,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:42:03,218 INFO L87 Difference]: Start difference. First operand 491 states and 598 transitions. Second operand 9 states. [2020-08-21 14:42:03,541 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:04,464 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:04,715 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:04,969 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:05,446 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:05,723 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:06,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:06,462 INFO L93 Difference]: Finished difference Result 1371 states and 1840 transitions. [2020-08-21 14:42:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 14:42:06,463 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-21 14:42:06,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:06,471 INFO L225 Difference]: With dead ends: 1371 [2020-08-21 14:42:06,471 INFO L226 Difference]: Without dead ends: 904 [2020-08-21 14:42:06,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:42:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-08-21 14:42:06,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 723. [2020-08-21 14:42:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2020-08-21 14:42:06,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 891 transitions. [2020-08-21 14:42:06,629 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 891 transitions. Word has length 61 [2020-08-21 14:42:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:06,629 INFO L479 AbstractCegarLoop]: Abstraction has 723 states and 891 transitions. [2020-08-21 14:42:06,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:42:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 891 transitions. [2020-08-21 14:42:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 14:42:06,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:06,632 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] [2020-08-21 14:42:06,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:42:06,633 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash 807556796, now seen corresponding path program 1 times [2020-08-21 14:42:06,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:06,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519580826] [2020-08-21 14:42:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:06,921 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:06,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:06,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:06,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:06,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:06,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:06,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:42:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:06,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:42:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:06,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:06,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:07,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:42:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:07,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:42:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:07,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 14:42:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:07,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 14:42:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:42:07,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519580826] [2020-08-21 14:42:07,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:07,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:42:07,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959275512] [2020-08-21 14:42:07,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:42:07,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:07,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:42:07,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:42:07,051 INFO L87 Difference]: Start difference. First operand 723 states and 891 transitions. Second operand 9 states. [2020-08-21 14:42:08,152 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:08,387 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:42:08,638 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:08,899 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:09,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:09,983 INFO L93 Difference]: Finished difference Result 1679 states and 2233 transitions. [2020-08-21 14:42:09,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:42:09,984 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-08-21 14:42:09,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:09,997 INFO L225 Difference]: With dead ends: 1679 [2020-08-21 14:42:09,997 INFO L226 Difference]: Without dead ends: 980 [2020-08-21 14:42:10,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:42:10,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-08-21 14:42:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 749. [2020-08-21 14:42:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-08-21 14:42:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 919 transitions. [2020-08-21 14:42:10,170 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 919 transitions. Word has length 83 [2020-08-21 14:42:10,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:10,171 INFO L479 AbstractCegarLoop]: Abstraction has 749 states and 919 transitions. [2020-08-21 14:42:10,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:42:10,171 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 919 transitions. [2020-08-21 14:42:10,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 14:42:10,174 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:10,175 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] [2020-08-21 14:42:10,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:42:10,175 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:10,176 INFO L82 PathProgramCache]: Analyzing trace with hash 830189050, now seen corresponding path program 1 times [2020-08-21 14:42:10,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:10,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828411314] [2020-08-21 14:42:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:10,421 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:10,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:10,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:10,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:10,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:10,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:10,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:42:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:10,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:42:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:10,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:10,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:10,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:42:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:10,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:42:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:10,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 14:42:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:10,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 14:42:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:42:10,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828411314] [2020-08-21 14:42:10,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:10,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 14:42:10,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017281003] [2020-08-21 14:42:10,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:42:10,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:10,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:42:10,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:42:10,631 INFO L87 Difference]: Start difference. First operand 749 states and 919 transitions. Second operand 11 states. [2020-08-21 14:42:11,077 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:42:11,301 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:11,518 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:12,143 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:12,396 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:12,641 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:42:13,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:13,762 INFO L93 Difference]: Finished difference Result 1733 states and 2344 transitions. [2020-08-21 14:42:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:42:13,762 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-21 14:42:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:13,770 INFO L225 Difference]: With dead ends: 1733 [2020-08-21 14:42:13,770 INFO L226 Difference]: Without dead ends: 1008 [2020-08-21 14:42:13,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:42:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2020-08-21 14:42:13,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 765. [2020-08-21 14:42:13,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-08-21 14:42:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 935 transitions. [2020-08-21 14:42:13,920 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 935 transitions. Word has length 83 [2020-08-21 14:42:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:13,920 INFO L479 AbstractCegarLoop]: Abstraction has 765 states and 935 transitions. [2020-08-21 14:42:13,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:42:13,921 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 935 transitions. [2020-08-21 14:42:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 14:42:13,924 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:13,924 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] [2020-08-21 14:42:13,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:42:13,925 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:13,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1855681049, now seen corresponding path program 1 times [2020-08-21 14:42:13,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:13,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011972213] [2020-08-21 14:42:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:14,189 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:42:14,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:42:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:14,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:42:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:14,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:42:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:14,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:42:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:14,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:42:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:14,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:42:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:14,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:42:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:14,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:14,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:42:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:14,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:42:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:14,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:42:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:14,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 14:42:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:14,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 14:42:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:42:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:42:14,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011972213] [2020-08-21 14:42:14,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:42:14,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 14:42:14,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576252224] [2020-08-21 14:42:14,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:42:14,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:42:14,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:42:14,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:42:14,363 INFO L87 Difference]: Start difference. First operand 765 states and 935 transitions. Second operand 7 states. [2020-08-21 14:42:14,665 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:15,106 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:42:17,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:42:17,296 INFO L93 Difference]: Finished difference Result 2622 states and 3569 transitions. [2020-08-21 14:42:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:42:17,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-08-21 14:42:17,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:42:17,309 INFO L225 Difference]: With dead ends: 2622 [2020-08-21 14:42:17,309 INFO L226 Difference]: Without dead ends: 1881 [2020-08-21 14:42:17,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:42:17,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-08-21 14:42:17,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1579. [2020-08-21 14:42:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-08-21 14:42:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 1949 transitions. [2020-08-21 14:42:17,616 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 1949 transitions. Word has length 83 [2020-08-21 14:42:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:42:17,616 INFO L479 AbstractCegarLoop]: Abstraction has 1579 states and 1949 transitions. [2020-08-21 14:42:17,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:42:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 1949 transitions. [2020-08-21 14:42:17,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-21 14:42:17,619 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:42:17,619 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] [2020-08-21 14:42:17,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:42:17,620 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:42:17,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:42:17,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1308897473, now seen corresponding path program 1 times [2020-08-21 14:42:17,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:42:17,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747348803] [2020-08-21 14:42:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:42:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:42:17,682 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:42:17,682 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:42:17,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:42:17,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:42:17 BoogieIcfgContainer [2020-08-21 14:42:17,721 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:42:17,723 INFO L168 Benchmark]: Toolchain (without parser) took 28638.24 ms. Allocated memory was 139.5 MB in the beginning and 677.4 MB in the end (delta: 537.9 MB). Free memory was 101.1 MB in the beginning and 135.2 MB in the end (delta: -34.1 MB). Peak memory consumption was 503.8 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:17,723 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 14:42:17,725 INFO L168 Benchmark]: CACSL2BoogieTranslator took 663.00 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 100.9 MB in the beginning and 169.3 MB in the end (delta: -68.4 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:17,725 INFO L168 Benchmark]: Boogie Preprocessor took 102.68 ms. Allocated memory is still 202.4 MB. Free memory was 169.3 MB in the beginning and 165.2 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:17,726 INFO L168 Benchmark]: RCFGBuilder took 1151.01 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 165.2 MB in the beginning and 194.4 MB in the end (delta: -29.2 MB). Peak memory consumption was 83.0 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:17,727 INFO L168 Benchmark]: TraceAbstraction took 26716.78 ms. Allocated memory was 235.4 MB in the beginning and 677.4 MB in the end (delta: 442.0 MB). Free memory was 194.4 MB in the beginning and 135.2 MB in the end (delta: 59.2 MB). Peak memory consumption was 501.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:42:17,730 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 663.00 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 100.9 MB in the beginning and 169.3 MB in the end (delta: -68.4 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.68 ms. Allocated memory is still 202.4 MB. Free memory was 169.3 MB in the beginning and 165.2 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1151.01 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 165.2 MB in the beginning and 194.4 MB in the end (delta: -29.2 MB). Peak memory consumption was 83.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26716.78 ms. Allocated memory was 235.4 MB in the beginning and 677.4 MB in the end (delta: 442.0 MB). Free memory was 194.4 MB in the beginning and 135.2 MB in the end (delta: 59.2 MB). Peak memory consumption was 501.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 704]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L121] int pumpRunning = 0; [L122] int systemActive = 1; [L503] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L773] int cleanupTimeShifts = 4; [L870] int waterLevel = 1; [L871] int methaneLevelCritical = 0; [L846] int retValue_acc ; [L847] int tmp ; [L851] FCALL select_helpers() [L852] FCALL select_features() [L853] CALL, EXPR valid_product() [L738] int retValue_acc ; [L741] retValue_acc = 1 [L742] return (retValue_acc); [L853] RET, EXPR valid_product() [L853] tmp = valid_product() [L855] COND TRUE \read(tmp) [L857] FCALL setup() [L858] CALL runTest() [L840] CALL test() [L46] int splverifierCounter ; [L47] int tmp ; [L48] int tmp___0 ; [L49] int tmp___1 ; [L50] int tmp___2 ; [L53] splverifierCounter = 0 [L55] COND TRUE 1 [L57] COND TRUE splverifierCounter < 4 [L63] tmp = __VERIFIER_nondet_int() [L65] COND TRUE \read(tmp) [L67] CALL waterRise() [L888] COND TRUE waterLevel < 2 [L889] waterLevel = waterLevel + 1 [L67] RET waterRise() [L73] tmp___0 = __VERIFIER_nondet_int() [L75] COND TRUE \read(tmp___0) [L77] CALL changeMethaneLevel() [L900] COND FALSE !(\read(methaneLevelCritical)) [L903] methaneLevelCritical = 1 [L77] RET changeMethaneLevel() [L83] tmp___2 = __VERIFIER_nondet_int() [L85] COND TRUE \read(tmp___2) [L100] CALL timeShift() [L129] COND FALSE !(\read(pumpRunning)) [L136] COND TRUE \read(systemActive) [L138] CALL processEnvironment() [L184] int tmp ; [L187] COND FALSE !(\read(pumpRunning)) [L202] CALL processEnvironment__wrappee__highWaterSensor() [L158] int tmp ; [L161] COND TRUE ! pumpRunning [L163] CALL, EXPR isHighWaterLevel() [L281] int retValue_acc ; [L282] int tmp ; [L283] int tmp___0 ; [L287] CALL, EXPR isHighWaterSensorDry() [L950] int retValue_acc ; [L953] COND FALSE !(waterLevel < 2) [L957] retValue_acc = 0 [L958] return (retValue_acc); [L287] RET, EXPR isHighWaterSensorDry() [L287] tmp = isHighWaterSensorDry() [L289] COND FALSE !(\read(tmp)) [L292] tmp___0 = 1 [L294] retValue_acc = tmp___0 [L295] return (retValue_acc); [L163] RET, EXPR isHighWaterLevel() [L163] tmp = isHighWaterLevel() [L165] COND TRUE \read(tmp) [L167] CALL activatePump() [L212] pumpRunning = 1 [L167] RET activatePump() [L202] RET processEnvironment__wrappee__highWaterSensor() [L138] RET processEnvironment() [L144] CALL __utac_acc__Specification1_spec__1() [L748] int tmp ; [L749] int tmp___0 ; [L753] CALL, EXPR isMethaneLevelCritical() [L909] int retValue_acc ; [L912] retValue_acc = methaneLevelCritical [L913] return (retValue_acc); [L753] RET, EXPR isMethaneLevelCritical() [L753] tmp = isMethaneLevelCritical() [L755] COND TRUE \read(tmp) [L757] CALL, EXPR isPumpRunning() [L236] int retValue_acc ; [L239] retValue_acc = pumpRunning [L240] return (retValue_acc); [L757] RET, EXPR isPumpRunning() [L757] tmp___0 = isPumpRunning() [L759] COND TRUE \read(tmp___0) [L761] CALL __automaton_fail() [L704] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 241 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 26.6s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 21.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 989 SDtfs, 1945 SDslu, 1031 SDs, 0 SdLazy, 5148 SolverSat, 1210 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 8.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1579occurred 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: 1.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 1203 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 598 NumberOfCodeBlocks, 598 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 503 ConstructedInterpolants, 0 QuantifiedInterpolants, 150744 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...