/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_product40.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:41:20,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:41:20,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:41:20,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:41:20,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:41:20,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:41:20,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:41:20,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:41:20,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:41:20,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:41:20,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:41:20,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:41:20,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:41:20,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:41:20,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:41:20,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:41:20,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:41:20,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:41:20,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:41:20,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:41:20,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:41:20,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:41:20,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:41:20,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:41:20,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:41:20,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:41:20,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:41:20,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:41:20,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:41:20,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:41:20,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:41:20,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:41:20,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:41:20,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:41:20,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:41:20,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:41:20,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:41:20,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:41:20,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:41:20,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:41:20,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:41:20,789 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 14:41:20,834 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:41:20,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:41:20,836 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:41:20,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:41:20,837 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:41:20,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:41:20,837 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:41:20,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:41:20,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:41:20,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:41:20,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:41:20,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:41:20,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:41:20,840 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:41:20,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:41:20,840 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:41:20,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:41:20,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:41:20,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:41:20,841 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:41:20,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:41:20,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:41:20,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:41:20,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:41:20,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:41:20,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:41:20,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:41:20,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:41:20,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:41:20,843 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 14:41:21,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:41:21,137 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:41:21,140 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:41:21,142 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:41:21,142 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:41:21,143 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product40.cil.c [2020-08-21 14:41:21,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9b7c821b/03740a47e2bb470c92b92e6c32e2adc6/FLAGeea6e9c3c [2020-08-21 14:41:21,764 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:41:21,764 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product40.cil.c [2020-08-21 14:41:21,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9b7c821b/03740a47e2bb470c92b92e6c32e2adc6/FLAGeea6e9c3c [2020-08-21 14:41:22,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9b7c821b/03740a47e2bb470c92b92e6c32e2adc6 [2020-08-21 14:41:22,068 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:41:22,070 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:41:22,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:41:22,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:41:22,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:41:22,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:41:22" (1/1) ... [2020-08-21 14:41:22,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2857e963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:22, skipping insertion in model container [2020-08-21 14:41:22,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:41:22" (1/1) ... [2020-08-21 14:41:22,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:41:22,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:41:22,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:41:22,557 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:41:22,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:41:22,745 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:41:22,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:22 WrapperNode [2020-08-21 14:41:22,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:41:22,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:41:22,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:41:22,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:41:22,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:22" (1/1) ... [2020-08-21 14:41:22,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:22" (1/1) ... [2020-08-21 14:41:22,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:22" (1/1) ... [2020-08-21 14:41:22,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:22" (1/1) ... [2020-08-21 14:41:22,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:22" (1/1) ... [2020-08-21 14:41:22,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:22" (1/1) ... [2020-08-21 14:41:22,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:22" (1/1) ... [2020-08-21 14:41:22,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:41:22,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:41:22,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:41:22,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:41:22,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:22" (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 14:41:22,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:41:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:41:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 14:41:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 14:41:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 14:41:22,982 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 14:41:22,983 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 14:41:22,983 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 14:41:22,983 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 14:41:22,983 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 14:41:22,983 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 14:41:22,983 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 14:41:22,984 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 14:41:22,984 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 14:41:22,984 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 14:41:22,984 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 14:41:22,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-21 14:41:22,985 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 14:41:22,985 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 14:41:22,985 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 14:41:22,985 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 14:41:22,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:41:22,986 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 14:41:22,986 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 14:41:22,986 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 14:41:22,986 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 14:41:22,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 14:41:22,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 14:41:22,987 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 14:41:22,987 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 14:41:22,987 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 14:41:22,987 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 14:41:22,987 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 14:41:22,988 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 14:41:22,988 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 14:41:22,988 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 14:41:22,988 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 14:41:22,988 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 14:41:22,988 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 14:41:22,989 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 14:41:22,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:41:22,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:41:22,989 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 14:41:22,989 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 14:41:22,990 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 14:41:22,990 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 14:41:22,990 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 14:41:22,990 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 14:41:22,990 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 14:41:22,990 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 14:41:22,990 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 14:41:22,991 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 14:41:22,991 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 14:41:22,991 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 14:41:22,991 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-21 14:41:22,991 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 14:41:22,991 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 14:41:22,992 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 14:41:22,992 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 14:41:22,992 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 14:41:22,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 14:41:22,992 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 14:41:22,992 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 14:41:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 14:41:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 14:41:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 14:41:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 14:41:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 14:41:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 14:41:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 14:41:22,993 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 14:41:22,994 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 14:41:22,994 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:41:22,994 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 14:41:22,994 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 14:41:22,994 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 14:41:22,994 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 14:41:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 14:41:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 14:41:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 14:41:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 14:41:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 14:41:22,995 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 14:41:22,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 14:41:22,996 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 14:41:22,996 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 14:41:22,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 14:41:22,996 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 14:41:22,996 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 14:41:22,996 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 14:41:22,997 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 14:41:22,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:41:22,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 14:41:22,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:41:24,007 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:41:24,008 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 14:41:24,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:41:24 BoogieIcfgContainer [2020-08-21 14:41:24,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:41:24,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:41:24,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:41:24,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:41:24,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:41:22" (1/3) ... [2020-08-21 14:41:24,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c147e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:41:24, skipping insertion in model container [2020-08-21 14:41:24,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:41:22" (2/3) ... [2020-08-21 14:41:24,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c147e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:41:24, skipping insertion in model container [2020-08-21 14:41:24,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:41:24" (3/3) ... [2020-08-21 14:41:24,021 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product40.cil.c [2020-08-21 14:41:24,031 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:41:24,039 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:41:24,052 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:41:24,077 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:41:24,077 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:41:24,078 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:41:24,078 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:41:24,078 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:41:24,078 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:41:24,078 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:41:24,078 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:41:24,101 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states. [2020-08-21 14:41:24,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 14:41:24,111 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:24,112 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 14:41:24,113 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:24,119 INFO L82 PathProgramCache]: Analyzing trace with hash -963613915, now seen corresponding path program 1 times [2020-08-21 14:41:24,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:24,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865928413] [2020-08-21 14:41:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:24,790 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:24,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:24,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:24,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:24,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:24,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:24,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 14:41:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:24,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 14:41:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:24,895 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 14:41:24,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865928413] [2020-08-21 14:41:24,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:24,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:41:24,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560267860] [2020-08-21 14:41:24,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:41:24,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:24,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:41:24,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:41:24,926 INFO L87 Difference]: Start difference. First operand 176 states. Second operand 3 states. [2020-08-21 14:41:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:41:26,130 INFO L93 Difference]: Finished difference Result 310 states and 407 transitions. [2020-08-21 14:41:26,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:41:26,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 14:41:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:41:26,148 INFO L225 Difference]: With dead ends: 310 [2020-08-21 14:41:26,148 INFO L226 Difference]: Without dead ends: 168 [2020-08-21 14:41:26,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:41:26,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-21 14:41:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 133. [2020-08-21 14:41:26,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-08-21 14:41:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 157 transitions. [2020-08-21 14:41:26,285 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 157 transitions. Word has length 46 [2020-08-21 14:41:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:41:26,285 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 157 transitions. [2020-08-21 14:41:26,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:41:26,289 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 157 transitions. [2020-08-21 14:41:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 14:41:26,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:26,295 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 14:41:26,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:41:26,295 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:26,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1539591980, now seen corresponding path program 1 times [2020-08-21 14:41:26,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:26,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968917985] [2020-08-21 14:41:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:26,648 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:26,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:26,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:26,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:26,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:26,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:26,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 14:41:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:26,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:41:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:26,696 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 14:41:26,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968917985] [2020-08-21 14:41:26,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:26,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:41:26,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404771721] [2020-08-21 14:41:26,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:41:26,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:26,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:41:26,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:41:26,700 INFO L87 Difference]: Start difference. First operand 133 states and 157 transitions. Second operand 4 states. [2020-08-21 14:41:27,093 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:27,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:41:27,951 INFO L93 Difference]: Finished difference Result 233 states and 286 transitions. [2020-08-21 14:41:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:41:27,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 14:41:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:41:27,959 INFO L225 Difference]: With dead ends: 233 [2020-08-21 14:41:27,959 INFO L226 Difference]: Without dead ends: 152 [2020-08-21 14:41:27,962 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 14:41:27,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-21 14:41:28,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 124. [2020-08-21 14:41:28,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-21 14:41:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2020-08-21 14:41:28,038 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 47 [2020-08-21 14:41:28,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:41:28,039 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2020-08-21 14:41:28,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:41:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2020-08-21 14:41:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 14:41:28,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:28,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:41:28,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:41:28,049 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:28,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1079098286, now seen corresponding path program 1 times [2020-08-21 14:41:28,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:28,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049455380] [2020-08-21 14:41:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:28,399 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:28,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:28,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:28,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:28,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:28,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:28,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 14:41:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:28,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 14:41:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:28,490 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 14:41:28,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049455380] [2020-08-21 14:41:28,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:28,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:41:28,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103153623] [2020-08-21 14:41:28,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:41:28,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:28,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:41:28,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:41:28,497 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand 8 states. [2020-08-21 14:41:28,908 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:41:29,253 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:29,482 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:29,701 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:30,412 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:41:32,169 INFO L93 Difference]: Finished difference Result 427 states and 532 transitions. [2020-08-21 14:41:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:41:32,171 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 14:41:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:41:32,180 INFO L225 Difference]: With dead ends: 427 [2020-08-21 14:41:32,180 INFO L226 Difference]: Without dead ends: 327 [2020-08-21 14:41:32,186 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 14:41:32,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-08-21 14:41:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 262. [2020-08-21 14:41:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-08-21 14:41:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 318 transitions. [2020-08-21 14:41:32,265 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 318 transitions. Word has length 52 [2020-08-21 14:41:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:41:32,266 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 318 transitions. [2020-08-21 14:41:32,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:41:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 318 transitions. [2020-08-21 14:41:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 14:41:32,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:32,268 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 14:41:32,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:41:32,269 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:32,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:32,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1051584563, now seen corresponding path program 1 times [2020-08-21 14:41:32,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:32,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849015374] [2020-08-21 14:41:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:32,602 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:32,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:32,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:32,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:32,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:32,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:32,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 14:41:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:32,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 14:41:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:32,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:41:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:32,703 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 14:41:32,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849015374] [2020-08-21 14:41:32,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:32,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:41:32,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118741094] [2020-08-21 14:41:32,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:41:32,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:32,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:41:32,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:41:32,706 INFO L87 Difference]: Start difference. First operand 262 states and 318 transitions. Second operand 8 states. [2020-08-21 14:41:33,054 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:41:33,984 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:34,329 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:41:34,575 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:34,857 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:35,334 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:36,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:41:36,130 INFO L93 Difference]: Finished difference Result 847 states and 1105 transitions. [2020-08-21 14:41:36,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:41:36,131 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-21 14:41:36,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:41:36,139 INFO L225 Difference]: With dead ends: 847 [2020-08-21 14:41:36,139 INFO L226 Difference]: Without dead ends: 609 [2020-08-21 14:41:36,145 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 14:41:36,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2020-08-21 14:41:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 479. [2020-08-21 14:41:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2020-08-21 14:41:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 586 transitions. [2020-08-21 14:41:36,269 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 586 transitions. Word has length 57 [2020-08-21 14:41:36,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:41:36,270 INFO L479 AbstractCegarLoop]: Abstraction has 479 states and 586 transitions. [2020-08-21 14:41:36,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:41:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 586 transitions. [2020-08-21 14:41:36,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 14:41:36,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:36,272 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 14:41:36,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:41:36,273 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:36,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:36,273 INFO L82 PathProgramCache]: Analyzing trace with hash -450930313, now seen corresponding path program 1 times [2020-08-21 14:41:36,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:36,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271752549] [2020-08-21 14:41:36,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:36,600 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:36,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:36,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:36,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:36,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:36,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:36,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:41:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:36,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:41:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:36,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 14:41:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:36,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 14:41:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:36,692 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 14:41:36,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271752549] [2020-08-21 14:41:36,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:36,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:41:36,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079854915] [2020-08-21 14:41:36,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:41:36,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:36,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:41:36,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:41:36,695 INFO L87 Difference]: Start difference. First operand 479 states and 586 transitions. Second operand 9 states. [2020-08-21 14:41:37,131 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:41:38,032 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:38,320 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:38,579 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:39,127 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:41:39,387 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:41:40,390 INFO L93 Difference]: Finished difference Result 1361 states and 1836 transitions. [2020-08-21 14:41:40,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 14:41:40,391 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-21 14:41:40,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:41:40,399 INFO L225 Difference]: With dead ends: 1361 [2020-08-21 14:41:40,399 INFO L226 Difference]: Without dead ends: 906 [2020-08-21 14:41:40,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:41:40,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-21 14:41:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 719. [2020-08-21 14:41:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 719 states. [2020-08-21 14:41:40,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 887 transitions. [2020-08-21 14:41:40,554 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 887 transitions. Word has length 61 [2020-08-21 14:41:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:41:40,555 INFO L479 AbstractCegarLoop]: Abstraction has 719 states and 887 transitions. [2020-08-21 14:41:40,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:41:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 887 transitions. [2020-08-21 14:41:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 14:41:40,557 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:40,558 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] [2020-08-21 14:41:40,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:41:40,558 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1506642599, now seen corresponding path program 1 times [2020-08-21 14:41:40,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:40,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216395075] [2020-08-21 14:41:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:40,818 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:40,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:40,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:40,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:40,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:40,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:40,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:41:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:40,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:41:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:40,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:41:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:40,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:41:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:40,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:41:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:40,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:41:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:40,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 14:41:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:40,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 14:41:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:40,981 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 14:41:40,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216395075] [2020-08-21 14:41:40,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:40,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:41:40,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55640925] [2020-08-21 14:41:40,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:41:40,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:40,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:41:40,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:41:40,985 INFO L87 Difference]: Start difference. First operand 719 states and 887 transitions. Second operand 9 states. [2020-08-21 14:41:41,385 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 14:41:42,408 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:42,648 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 14:41:42,890 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:43,156 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:41:44,990 INFO L93 Difference]: Finished difference Result 2409 states and 3416 transitions. [2020-08-21 14:41:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:41:44,991 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-08-21 14:41:44,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:41:45,011 INFO L225 Difference]: With dead ends: 2409 [2020-08-21 14:41:45,011 INFO L226 Difference]: Without dead ends: 1714 [2020-08-21 14:41:45,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:41:45,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-08-21 14:41:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1291. [2020-08-21 14:41:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1291 states. [2020-08-21 14:41:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1578 transitions. [2020-08-21 14:41:45,353 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1578 transitions. Word has length 84 [2020-08-21 14:41:45,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:41:45,354 INFO L479 AbstractCegarLoop]: Abstraction has 1291 states and 1578 transitions. [2020-08-21 14:41:45,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:41:45,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1578 transitions. [2020-08-21 14:41:45,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 14:41:45,362 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:45,363 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] [2020-08-21 14:41:45,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:41:45,363 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:45,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:45,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1762832698, now seen corresponding path program 1 times [2020-08-21 14:41:45,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:45,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898093243] [2020-08-21 14:41:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:45,695 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:45,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:45,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:45,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:45,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:45,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:45,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:41:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:45,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:41:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:45,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:41:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:45,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:41:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:45,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:41:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:45,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:41:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:45,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 14:41:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:45,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 14:41:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:45,838 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 14:41:45,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898093243] [2020-08-21 14:41:45,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:45,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:41:45,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980422529] [2020-08-21 14:41:45,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:41:45,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:45,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:41:45,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:41:45,846 INFO L87 Difference]: Start difference. First operand 1291 states and 1578 transitions. Second operand 9 states. [2020-08-21 14:41:47,039 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 14:41:47,328 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 14:41:47,587 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:47,832 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:48,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:41:48,940 INFO L93 Difference]: Finished difference Result 2981 states and 3956 transitions. [2020-08-21 14:41:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:41:48,941 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-08-21 14:41:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:41:48,953 INFO L225 Difference]: With dead ends: 2981 [2020-08-21 14:41:48,954 INFO L226 Difference]: Without dead ends: 1714 [2020-08-21 14:41:48,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:41:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-08-21 14:41:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1331. [2020-08-21 14:41:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2020-08-21 14:41:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1618 transitions. [2020-08-21 14:41:49,210 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1618 transitions. Word has length 84 [2020-08-21 14:41:49,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:41:49,210 INFO L479 AbstractCegarLoop]: Abstraction has 1331 states and 1618 transitions. [2020-08-21 14:41:49,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:41:49,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1618 transitions. [2020-08-21 14:41:49,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 14:41:49,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:49,213 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] [2020-08-21 14:41:49,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:41:49,214 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:49,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:49,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1785464952, now seen corresponding path program 1 times [2020-08-21 14:41:49,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:49,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088976062] [2020-08-21 14:41:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:49,496 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 14:41:49,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:41:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:49,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:41:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:49,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:41:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:49,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:41:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:49,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 14:41:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:49,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:41:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:49,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:41:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:49,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:41:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:49,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:41:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:49,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:41:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:49,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:41:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:49,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 14:41:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:49,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 14:41:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:41:49,614 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 14:41:49,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088976062] [2020-08-21 14:41:49,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:41:49,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 14:41:49,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136282775] [2020-08-21 14:41:49,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:41:49,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:41:49,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:41:49,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:41:49,618 INFO L87 Difference]: Start difference. First operand 1331 states and 1618 transitions. Second operand 11 states. [2020-08-21 14:41:50,371 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:50,721 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:51,033 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:51,820 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:52,071 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:52,324 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 14:41:53,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:41:53,516 INFO L93 Difference]: Finished difference Result 2667 states and 3504 transitions. [2020-08-21 14:41:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:41:53,517 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-08-21 14:41:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:41:53,525 INFO L225 Difference]: With dead ends: 2667 [2020-08-21 14:41:53,526 INFO L226 Difference]: Without dead ends: 1360 [2020-08-21 14:41:53,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:41:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2020-08-21 14:41:53,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1097. [2020-08-21 14:41:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1097 states. [2020-08-21 14:41:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1306 transitions. [2020-08-21 14:41:53,763 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1306 transitions. Word has length 84 [2020-08-21 14:41:53,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:41:53,763 INFO L479 AbstractCegarLoop]: Abstraction has 1097 states and 1306 transitions. [2020-08-21 14:41:53,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:41:53,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1306 transitions. [2020-08-21 14:41:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 14:41:53,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:41:53,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:41:53,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:41:53,768 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:41:53,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:41:53,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1546032113, now seen corresponding path program 1 times [2020-08-21 14:41:53,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:41:53,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231825625] [2020-08-21 14:41:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:41:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:41:53,870 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:41:53,871 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:41:53,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:41:53,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:41:53 BoogieIcfgContainer [2020-08-21 14:41:53,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:41:53,927 INFO L168 Benchmark]: Toolchain (without parser) took 31856.74 ms. Allocated memory was 140.5 MB in the beginning and 696.3 MB in the end (delta: 555.7 MB). Free memory was 101.1 MB in the beginning and 496.6 MB in the end (delta: -395.5 MB). Peak memory consumption was 160.2 MB. Max. memory is 7.1 GB. [2020-08-21 14:41:53,931 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 14:41:53,934 INFO L168 Benchmark]: CACSL2BoogieTranslator took 675.32 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 100.9 MB in the beginning and 171.1 MB in the end (delta: -70.3 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:41:53,942 INFO L168 Benchmark]: Boogie Preprocessor took 145.82 ms. Allocated memory is still 204.5 MB. Free memory was 171.1 MB in the beginning and 167.2 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:41:53,943 INFO L168 Benchmark]: RCFGBuilder took 1120.38 ms. Allocated memory was 204.5 MB in the beginning and 234.9 MB in the end (delta: 30.4 MB). Free memory was 167.2 MB in the beginning and 191.9 MB in the end (delta: -24.7 MB). Peak memory consumption was 80.6 MB. Max. memory is 7.1 GB. [2020-08-21 14:41:53,947 INFO L168 Benchmark]: TraceAbstraction took 29910.24 ms. Allocated memory was 234.9 MB in the beginning and 696.3 MB in the end (delta: 461.4 MB). Free memory was 191.9 MB in the beginning and 496.6 MB in the end (delta: -304.7 MB). Peak memory consumption was 156.6 MB. Max. memory is 7.1 GB. [2020-08-21 14:41:53,955 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 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 675.32 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 100.9 MB in the beginning and 171.1 MB in the end (delta: -70.3 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.82 ms. Allocated memory is still 204.5 MB. Free memory was 171.1 MB in the beginning and 167.2 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1120.38 ms. Allocated memory was 204.5 MB in the beginning and 234.9 MB in the end (delta: 30.4 MB). Free memory was 167.2 MB in the beginning and 191.9 MB in the end (delta: -24.7 MB). Peak memory consumption was 80.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29910.24 ms. Allocated memory was 234.9 MB in the beginning and 696.3 MB in the end (delta: 461.4 MB). Free memory was 191.9 MB in the beginning and 496.6 MB in the end (delta: -304.7 MB). Peak memory consumption was 156.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 490]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L51] int pumpRunning = 0; [L52] int systemActive = 1; [L352] int cleanupTimeShifts = 4; [L664] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L862] int waterLevel = 1; [L863] int methaneLevelCritical = 0; [L428] int retValue_acc ; [L429] int tmp ; [L433] FCALL select_helpers() [L434] FCALL select_features() [L435] CALL, EXPR valid_product() [L477] int retValue_acc ; [L480] retValue_acc = 1 [L481] return (retValue_acc); [L435] RET, EXPR valid_product() [L435] tmp = valid_product() [L437] COND TRUE \read(tmp) [L439] FCALL setup() [L440] CALL runTest() [L419] CALL test() [L257] int splverifierCounter ; [L258] int tmp ; [L259] int tmp___0 ; [L260] int tmp___1 ; [L261] int tmp___2 ; [L264] splverifierCounter = 0 [L266] COND TRUE 1 [L268] COND TRUE splverifierCounter < 4 [L274] tmp = __VERIFIER_nondet_int() [L276] COND TRUE \read(tmp) [L278] CALL waterRise() [L880] COND TRUE waterLevel < 2 [L881] waterLevel = waterLevel + 1 [L278] RET waterRise() [L284] tmp___0 = __VERIFIER_nondet_int() [L286] COND TRUE \read(tmp___0) [L288] CALL changeMethaneLevel() [L892] COND FALSE !(\read(methaneLevelCritical)) [L895] methaneLevelCritical = 1 [L288] RET changeMethaneLevel() [L294] tmp___2 = __VERIFIER_nondet_int() [L296] COND FALSE !(\read(tmp___2)) [L302] tmp___1 = __VERIFIER_nondet_int() [L304] COND FALSE !(\read(tmp___1)) [L313] CALL timeShift() [L59] COND FALSE !(\read(pumpRunning)) [L66] COND TRUE \read(systemActive) [L68] CALL processEnvironment() [L114] int tmp ; [L117] COND FALSE !(\read(pumpRunning)) [L132] CALL processEnvironment__wrappee__highWaterSensor() [L88] int tmp ; [L91] COND TRUE ! pumpRunning [L93] CALL, EXPR isHighWaterLevel() [L211] int retValue_acc ; [L212] int tmp ; [L213] int tmp___0 ; [L217] CALL, EXPR isHighWaterSensorDry() [L942] int retValue_acc ; [L945] COND FALSE !(waterLevel < 2) [L949] retValue_acc = 0 [L950] return (retValue_acc); [L217] RET, EXPR isHighWaterSensorDry() [L217] tmp = isHighWaterSensorDry() [L219] COND FALSE !(\read(tmp)) [L222] tmp___0 = 1 [L224] retValue_acc = tmp___0 [L225] return (retValue_acc); [L93] RET, EXPR isHighWaterLevel() [L93] tmp = isHighWaterLevel() [L95] COND TRUE \read(tmp) [L97] CALL activatePump() [L142] pumpRunning = 1 [L97] RET activatePump() [L132] RET processEnvironment__wrappee__highWaterSensor() [L68] RET processEnvironment() [L74] CALL __utac_acc__Specification1_spec__1() [L327] int tmp ; [L328] int tmp___0 ; [L332] CALL, EXPR isMethaneLevelCritical() [L901] int retValue_acc ; [L904] retValue_acc = methaneLevelCritical [L905] return (retValue_acc); [L332] RET, EXPR isMethaneLevelCritical() [L332] tmp = isMethaneLevelCritical() [L334] COND TRUE \read(tmp) [L336] CALL, EXPR isPumpRunning() [L166] int retValue_acc ; [L169] retValue_acc = pumpRunning [L170] return (retValue_acc); [L336] RET, EXPR isPumpRunning() [L336] tmp___0 = isPumpRunning() [L338] COND TRUE \read(tmp___0) [L340] CALL __automaton_fail() [L490] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 40 procedures, 235 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 29.8s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 24.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 943 SDtfs, 1824 SDslu, 1196 SDs, 0 SdLazy, 5496 SolverSat, 1255 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 269 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1331occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 1514 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 603 NumberOfCodeBlocks, 603 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 507 ConstructedInterpolants, 0 QuantifiedInterpolants, 150284 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...