/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --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_product35.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:06:09,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:06:09,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:06:09,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:06:09,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:06:09,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:06:09,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:06:09,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:06:09,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:06:09,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:06:09,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:06:09,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:06:09,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:06:09,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:06:09,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:06:09,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:06:09,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:06:09,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:06:09,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:06:09,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:06:09,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:06:09,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:06:09,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:06:09,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:06:09,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:06:09,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:06:09,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:06:09,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:06:09,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:06:09,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:06:09,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:06:09,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:06:09,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:06:09,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:06:09,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:06:09,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:06:09,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:06:09,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:06:09,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:06:09,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:06:09,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:06:09,773 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 17:06:09,795 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:06:09,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:06:09,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:06:09,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:06:09,797 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:06:09,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:06:09,798 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:06:09,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:06:09,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:06:09,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:06:09,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:06:09,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:06:09,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:06:09,799 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:06:09,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:06:09,799 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:06:09,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:06:09,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:06:09,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:06:09,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:06:09,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:06:09,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:06:09,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:06:09,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:06:09,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:06:09,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:06:09,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:06:09,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:06:09,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:06:09,802 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:06:10,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:06:10,149 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:06:10,153 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:06:10,155 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:06:10,155 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:06:10,156 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product35.cil.c [2020-08-21 17:06:10,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d355ef80/fbfdc678a55146fb81404fec7347c1a4/FLAG822d8d826 [2020-08-21 17:06:10,763 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:06:10,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product35.cil.c [2020-08-21 17:06:10,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d355ef80/fbfdc678a55146fb81404fec7347c1a4/FLAG822d8d826 [2020-08-21 17:06:11,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d355ef80/fbfdc678a55146fb81404fec7347c1a4 [2020-08-21 17:06:11,090 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:06:11,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:06:11,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:06:11,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:06:11,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:06:11,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:06:11" (1/1) ... [2020-08-21 17:06:11,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b54cc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:11, skipping insertion in model container [2020-08-21 17:06:11,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:06:11" (1/1) ... [2020-08-21 17:06:11,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:06:11,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:06:11,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:06:11,536 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:06:11,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:06:11,769 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:06:11,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:11 WrapperNode [2020-08-21 17:06:11,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:06:11,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:06:11,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:06:11,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:06:11,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:11" (1/1) ... [2020-08-21 17:06:11,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:11" (1/1) ... [2020-08-21 17:06:11,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:11" (1/1) ... [2020-08-21 17:06:11,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:11" (1/1) ... [2020-08-21 17:06:11,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:11" (1/1) ... [2020-08-21 17:06:11,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:11" (1/1) ... [2020-08-21 17:06:11,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:11" (1/1) ... [2020-08-21 17:06:11,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:06:11,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:06:11,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:06:11,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:06:11,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:11" (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 17:06:11,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:06:11,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:06:11,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 17:06:11,934 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 17:06:11,935 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 17:06:11,935 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 17:06:11,935 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 17:06:11,935 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 17:06:11,935 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 17:06:11,935 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 17:06:11,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 17:06:11,936 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-21 17:06:11,936 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 17:06:11,936 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 17:06:11,936 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 17:06:11,936 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 17:06:11,937 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 17:06:11,937 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 17:06:11,937 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 17:06:11,937 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 17:06:11,937 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 17:06:11,937 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 17:06:11,937 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 17:06:11,938 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 17:06:11,938 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 17:06:11,938 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 17:06:11,938 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 17:06:11,938 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 17:06:11,938 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 17:06:11,939 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 17:06:11,939 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 17:06:11,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:06:11,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 17:06:11,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 17:06:11,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 17:06:11,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 17:06:11,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 17:06:11,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 17:06:11,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:06:11,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:06:11,940 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 17:06:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 17:06:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 17:06:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 17:06:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 17:06:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 17:06:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 17:06:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 17:06:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 17:06:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 17:06:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 17:06:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-21 17:06:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 17:06:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 17:06:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 17:06:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 17:06:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 17:06:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 17:06:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 17:06:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 17:06:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 17:06:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 17:06:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 17:06:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 17:06:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 17:06:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 17:06:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 17:06:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 17:06:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 17:06:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 17:06:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:06:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 17:06:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 17:06:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 17:06:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 17:06:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 17:06:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 17:06:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 17:06:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 17:06:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 17:06:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 17:06:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 17:06:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 17:06:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 17:06:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 17:06:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 17:06:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 17:06:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:06:11,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 17:06:11,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:06:13,056 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:06:13,056 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 17:06:13,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:06:13 BoogieIcfgContainer [2020-08-21 17:06:13,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:06:13,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:06:13,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:06:13,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:06:13,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:06:11" (1/3) ... [2020-08-21 17:06:13,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b87486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:06:13, skipping insertion in model container [2020-08-21 17:06:13,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:11" (2/3) ... [2020-08-21 17:06:13,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b87486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:06:13, skipping insertion in model container [2020-08-21 17:06:13,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:06:13" (3/3) ... [2020-08-21 17:06:13,071 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product35.cil.c [2020-08-21 17:06:13,082 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:06:13,090 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:06:13,105 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:06:13,131 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:06:13,131 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:06:13,132 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:06:13,132 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:06:13,132 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:06:13,132 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:06:13,133 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:06:13,133 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:06:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-08-21 17:06:13,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 17:06:13,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:13,167 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 17:06:13,168 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:13,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:13,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1896668179, now seen corresponding path program 1 times [2020-08-21 17:06:13,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:13,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879730305] [2020-08-21 17:06:13,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:13,858 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:13,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:13,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:13,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:13,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:13,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:13,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:06:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:13,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 17:06:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:13,985 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 17:06:13,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879730305] [2020-08-21 17:06:13,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:13,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:06:13,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018165154] [2020-08-21 17:06:14,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:06:14,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:14,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:06:14,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:06:14,024 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 3 states. [2020-08-21 17:06:15,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:15,122 INFO L93 Difference]: Finished difference Result 269 states and 354 transitions. [2020-08-21 17:06:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:06:15,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 17:06:15,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:15,139 INFO L225 Difference]: With dead ends: 269 [2020-08-21 17:06:15,139 INFO L226 Difference]: Without dead ends: 146 [2020-08-21 17:06:15,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:06:15,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-21 17:06:15,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 114. [2020-08-21 17:06:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 17:06:15,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 133 transitions. [2020-08-21 17:06:15,226 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 133 transitions. Word has length 46 [2020-08-21 17:06:15,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:15,227 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 133 transitions. [2020-08-21 17:06:15,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:06:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 133 transitions. [2020-08-21 17:06:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 17:06:15,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:15,231 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 17:06:15,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:06:15,231 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:15,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:15,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1220507007, now seen corresponding path program 1 times [2020-08-21 17:06:15,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:15,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500879320] [2020-08-21 17:06:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:15,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:15,596 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:15,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:15,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:15,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:15,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:15,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:15,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:06:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:15,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:06:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:15,635 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 17:06:15,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500879320] [2020-08-21 17:06:15,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:15,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:06:15,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936635581] [2020-08-21 17:06:15,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:06:15,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:15,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:06:15,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:06:15,639 INFO L87 Difference]: Start difference. First operand 114 states and 133 transitions. Second operand 4 states. [2020-08-21 17:06:16,056 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:16,806 INFO L93 Difference]: Finished difference Result 193 states and 235 transitions. [2020-08-21 17:06:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:06:16,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 17:06:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:16,811 INFO L225 Difference]: With dead ends: 193 [2020-08-21 17:06:16,811 INFO L226 Difference]: Without dead ends: 130 [2020-08-21 17:06:16,813 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 17:06:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-21 17:06:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2020-08-21 17:06:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 17:06:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2020-08-21 17:06:16,848 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 47 [2020-08-21 17:06:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:16,848 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2020-08-21 17:06:16,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:06:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2020-08-21 17:06:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 17:06:16,851 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:16,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:06:16,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:06:16,852 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:16,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:16,852 INFO L82 PathProgramCache]: Analyzing trace with hash -421022276, now seen corresponding path program 1 times [2020-08-21 17:06:16,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:16,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140384902] [2020-08-21 17:06:16,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,146 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:17,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:06:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:06:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,229 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 17:06:17,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140384902] [2020-08-21 17:06:17,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:17,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:06:17,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432782446] [2020-08-21 17:06:17,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:06:17,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:17,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:06:17,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:06:17,232 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand 8 states. [2020-08-21 17:06:17,631 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:06:17,927 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:18,161 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:18,425 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:19,139 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:20,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:20,630 INFO L93 Difference]: Finished difference Result 363 states and 449 transitions. [2020-08-21 17:06:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:06:20,631 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-21 17:06:20,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:20,637 INFO L225 Difference]: With dead ends: 363 [2020-08-21 17:06:20,638 INFO L226 Difference]: Without dead ends: 282 [2020-08-21 17:06:20,639 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 17:06:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-21 17:06:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 216. [2020-08-21 17:06:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-21 17:06:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 258 transitions. [2020-08-21 17:06:20,704 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 258 transitions. Word has length 51 [2020-08-21 17:06:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:20,704 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 258 transitions. [2020-08-21 17:06:20,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:06:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 258 transitions. [2020-08-21 17:06:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:06:20,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:20,708 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 17:06:20,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:06:20,708 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:20,708 INFO L82 PathProgramCache]: Analyzing trace with hash 498542477, now seen corresponding path program 1 times [2020-08-21 17:06:20,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:20,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913365091] [2020-08-21 17:06:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:20,982 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:20,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:21,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:21,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:21,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:21,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:21,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:06:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:21,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:06:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:21,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 17:06:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:21,070 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 17:06:21,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913365091] [2020-08-21 17:06:21,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:21,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:06:21,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26313866] [2020-08-21 17:06:21,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:06:21,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:21,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:06:21,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:06:21,072 INFO L87 Difference]: Start difference. First operand 216 states and 258 transitions. Second operand 8 states. [2020-08-21 17:06:21,464 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:06:22,550 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:22,863 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:23,178 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:23,454 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:06:23,787 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:24,527 INFO L93 Difference]: Finished difference Result 698 states and 907 transitions. [2020-08-21 17:06:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 17:06:24,529 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-21 17:06:24,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:24,535 INFO L225 Difference]: With dead ends: 698 [2020-08-21 17:06:24,535 INFO L226 Difference]: Without dead ends: 506 [2020-08-21 17:06:24,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:06:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-21 17:06:24,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 387. [2020-08-21 17:06:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-08-21 17:06:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 466 transitions. [2020-08-21 17:06:24,674 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 466 transitions. Word has length 57 [2020-08-21 17:06:24,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:24,675 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 466 transitions. [2020-08-21 17:06:24,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:06:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 466 transitions. [2020-08-21 17:06:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 17:06:24,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:24,678 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 17:06:24,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:06:24,679 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:24,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:24,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1390027601, now seen corresponding path program 1 times [2020-08-21 17:06:24,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:24,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287316055] [2020-08-21 17:06:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:24,999 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:24,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:06:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:06:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:06:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 17:06:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,121 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 17:06:25,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287316055] [2020-08-21 17:06:25,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:25,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:06:25,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536440576] [2020-08-21 17:06:25,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:06:25,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:25,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:06:25,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:06:25,123 INFO L87 Difference]: Start difference. First operand 387 states and 466 transitions. Second operand 9 states. [2020-08-21 17:06:25,480 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:06:26,465 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:26,741 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:26,997 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:27,448 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:06:27,737 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:28,464 INFO L93 Difference]: Finished difference Result 1120 states and 1488 transitions. [2020-08-21 17:06:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 17:06:28,471 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-21 17:06:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:28,476 INFO L225 Difference]: With dead ends: 1120 [2020-08-21 17:06:28,476 INFO L226 Difference]: Without dead ends: 757 [2020-08-21 17:06:28,478 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 17:06:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2020-08-21 17:06:28,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 599. [2020-08-21 17:06:28,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-08-21 17:06:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 735 transitions. [2020-08-21 17:06:28,605 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 735 transitions. Word has length 61 [2020-08-21 17:06:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:28,606 INFO L479 AbstractCegarLoop]: Abstraction has 599 states and 735 transitions. [2020-08-21 17:06:28,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:06:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 735 transitions. [2020-08-21 17:06:28,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 17:06:28,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:28,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:06:28,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:06:28,610 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:28,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:28,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1223870708, now seen corresponding path program 1 times [2020-08-21 17:06:28,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:28,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600930549] [2020-08-21 17:06:28,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:28,947 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:28,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:28,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:28,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:28,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:28,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:06:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:06:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:06:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:06:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:06:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 17:06:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 17:06:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,149 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 17:06:29,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600930549] [2020-08-21 17:06:29,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:29,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:06:29,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036564526] [2020-08-21 17:06:29,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:06:29,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:29,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:06:29,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:06:29,151 INFO L87 Difference]: Start difference. First operand 599 states and 735 transitions. Second operand 9 states. [2020-08-21 17:06:29,962 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:06:30,880 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:31,142 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:06:31,465 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:31,737 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:06:33,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:33,370 INFO L93 Difference]: Finished difference Result 2076 states and 2949 transitions. [2020-08-21 17:06:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 17:06:33,370 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-08-21 17:06:33,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:33,384 INFO L225 Difference]: With dead ends: 2076 [2020-08-21 17:06:33,384 INFO L226 Difference]: Without dead ends: 1501 [2020-08-21 17:06:33,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-21 17:06:33,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2020-08-21 17:06:33,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1127. [2020-08-21 17:06:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1127 states. [2020-08-21 17:06:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1380 transitions. [2020-08-21 17:06:33,687 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1380 transitions. Word has length 78 [2020-08-21 17:06:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:33,688 INFO L479 AbstractCegarLoop]: Abstraction has 1127 states and 1380 transitions. [2020-08-21 17:06:33,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:06:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1380 transitions. [2020-08-21 17:06:33,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 17:06:33,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:33,695 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] [2020-08-21 17:06:33,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:06:33,696 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:33,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1060992747, now seen corresponding path program 1 times [2020-08-21 17:06:33,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:33,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534948415] [2020-08-21 17:06:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,941 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:33,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:06:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:06:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:34,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:06:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:34,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:06:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:34,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:06:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:34,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 17:06:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:34,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 17:06:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:34,073 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 17:06:34,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534948415] [2020-08-21 17:06:34,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:34,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:06:34,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787217762] [2020-08-21 17:06:34,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:06:34,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:34,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:06:34,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:06:34,076 INFO L87 Difference]: Start difference. First operand 1127 states and 1380 transitions. Second operand 9 states. [2020-08-21 17:06:35,195 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:35,475 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:06:35,746 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:35,982 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:37,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:37,053 INFO L93 Difference]: Finished difference Result 2617 states and 3478 transitions. [2020-08-21 17:06:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:06:37,053 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-08-21 17:06:37,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:37,064 INFO L225 Difference]: With dead ends: 2617 [2020-08-21 17:06:37,064 INFO L226 Difference]: Without dead ends: 1514 [2020-08-21 17:06:37,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 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 17:06:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-21 17:06:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1167. [2020-08-21 17:06:37,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1167 states. [2020-08-21 17:06:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1420 transitions. [2020-08-21 17:06:37,294 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1420 transitions. Word has length 78 [2020-08-21 17:06:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:37,294 INFO L479 AbstractCegarLoop]: Abstraction has 1167 states and 1420 transitions. [2020-08-21 17:06:37,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:06:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1420 transitions. [2020-08-21 17:06:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 17:06:37,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:37,298 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] [2020-08-21 17:06:37,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:06:37,298 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:37,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:37,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1570465837, now seen corresponding path program 1 times [2020-08-21 17:06:37,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:37,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228410967] [2020-08-21 17:06:37,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:37,544 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:37,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:37,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:37,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:37,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:37,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:37,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:06:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:37,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:06:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:37,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:06:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:37,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:06:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:37,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:06:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:37,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 17:06:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:37,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 17:06:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:37,673 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 17:06:37,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228410967] [2020-08-21 17:06:37,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:37,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 17:06:37,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966849673] [2020-08-21 17:06:37,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 17:06:37,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:37,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 17:06:37,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:06:37,679 INFO L87 Difference]: Start difference. First operand 1167 states and 1420 transitions. Second operand 11 states. [2020-08-21 17:06:38,504 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:38,753 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:38,973 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:39,612 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:39,859 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:40,109 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:41,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:41,246 INFO L93 Difference]: Finished difference Result 2323 states and 3044 transitions. [2020-08-21 17:06:41,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 17:06:41,247 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-08-21 17:06:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:41,254 INFO L225 Difference]: With dead ends: 2323 [2020-08-21 17:06:41,254 INFO L226 Difference]: Without dead ends: 1180 [2020-08-21 17:06:41,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 17:06:41,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2020-08-21 17:06:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 949. [2020-08-21 17:06:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 949 states. [2020-08-21 17:06:41,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1124 transitions. [2020-08-21 17:06:41,445 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1124 transitions. Word has length 78 [2020-08-21 17:06:41,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:41,446 INFO L479 AbstractCegarLoop]: Abstraction has 949 states and 1124 transitions. [2020-08-21 17:06:41,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 17:06:41,446 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1124 transitions. [2020-08-21 17:06:41,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-21 17:06:41,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:41,449 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] [2020-08-21 17:06:41,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:06:41,450 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:41,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:41,450 INFO L82 PathProgramCache]: Analyzing trace with hash -341045236, now seen corresponding path program 1 times [2020-08-21 17:06:41,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:41,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868412977] [2020-08-21 17:06:41,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 17:06:41,546 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 17:06:41,547 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 17:06:41,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:06:41,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:06:41 BoogieIcfgContainer [2020-08-21 17:06:41,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:06:41,599 INFO L168 Benchmark]: Toolchain (without parser) took 30507.23 ms. Allocated memory was 140.5 MB in the beginning and 641.2 MB in the end (delta: 500.7 MB). Free memory was 102.4 MB in the beginning and 469.1 MB in the end (delta: -366.7 MB). Peak memory consumption was 134.0 MB. Max. memory is 7.1 GB. [2020-08-21 17:06:41,605 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 17:06:41,607 INFO L168 Benchmark]: CACSL2BoogieTranslator took 678.19 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 102.2 MB in the beginning and 173.5 MB in the end (delta: -71.3 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-08-21 17:06:41,612 INFO L168 Benchmark]: Boogie Preprocessor took 96.38 ms. Allocated memory is still 203.4 MB. Free memory was 173.5 MB in the beginning and 169.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-08-21 17:06:41,614 INFO L168 Benchmark]: RCFGBuilder took 1192.21 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 168.8 MB in the beginning and 199.1 MB in the end (delta: -30.2 MB). Peak memory consumption was 82.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:06:41,615 INFO L168 Benchmark]: TraceAbstraction took 28533.40 ms. Allocated memory was 235.4 MB in the beginning and 641.2 MB in the end (delta: 405.8 MB). Free memory was 197.6 MB in the beginning and 469.1 MB in the end (delta: -271.4 MB). Peak memory consumption was 134.4 MB. Max. memory is 7.1 GB. [2020-08-21 17:06:41,622 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 678.19 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 102.2 MB in the beginning and 173.5 MB in the end (delta: -71.3 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 96.38 ms. Allocated memory is still 203.4 MB. Free memory was 173.5 MB in the beginning and 169.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1192.21 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 168.8 MB in the beginning and 199.1 MB in the end (delta: -30.2 MB). Peak memory consumption was 82.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28533.40 ms. Allocated memory was 235.4 MB in the beginning and 641.2 MB in the end (delta: 405.8 MB). Free memory was 197.6 MB in the beginning and 469.1 MB in the end (delta: -271.4 MB). Peak memory consumption was 134.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 145]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L47] int waterLevel = 1; [L48] int methaneLevelCritical = 0; [L250] int pumpRunning = 0; [L251] int systemActive = 1; [L455] int cleanupTimeShifts = 4; [L720] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L528] int retValue_acc ; [L529] int tmp ; [L533] FCALL select_helpers() [L534] FCALL select_features() [L535] CALL, EXPR valid_product() [L446] int retValue_acc ; [L449] retValue_acc = 1 [L450] return (retValue_acc); [L535] RET, EXPR valid_product() [L535] tmp = valid_product() [L537] COND TRUE \read(tmp) [L539] FCALL setup() [L540] CALL runTest() [L522] CALL test() [L181] int splverifierCounter ; [L182] int tmp ; [L183] int tmp___0 ; [L184] int tmp___1 ; [L185] int tmp___2 ; [L188] splverifierCounter = 0 [L190] COND TRUE 1 [L192] COND TRUE splverifierCounter < 4 [L198] tmp = __VERIFIER_nondet_int() [L200] COND TRUE \read(tmp) [L202] CALL waterRise() [L65] COND TRUE waterLevel < 2 [L66] waterLevel = waterLevel + 1 [L202] RET waterRise() [L208] tmp___0 = __VERIFIER_nondet_int() [L210] COND TRUE \read(tmp___0) [L212] CALL changeMethaneLevel() [L77] COND FALSE !(\read(methaneLevelCritical)) [L80] methaneLevelCritical = 1 [L212] RET changeMethaneLevel() [L218] tmp___2 = __VERIFIER_nondet_int() [L220] COND TRUE \read(tmp___2) [L235] CALL timeShift() [L257] COND FALSE !(\read(pumpRunning)) [L264] COND TRUE \read(systemActive) [L266] CALL processEnvironment() [L286] int tmp ; [L289] COND TRUE ! pumpRunning [L291] CALL, EXPR isHighWaterLevel() [L383] int retValue_acc ; [L384] int tmp ; [L385] int tmp___0 ; [L389] CALL, EXPR isHighWaterSensorDry() [L127] int retValue_acc ; [L130] COND FALSE !(waterLevel < 2) [L134] retValue_acc = 0 [L135] return (retValue_acc); [L389] RET, EXPR isHighWaterSensorDry() [L389] tmp = isHighWaterSensorDry() [L391] COND FALSE !(\read(tmp)) [L394] tmp___0 = 1 [L396] retValue_acc = tmp___0 [L397] return (retValue_acc); [L291] RET, EXPR isHighWaterLevel() [L291] tmp = isHighWaterLevel() [L293] COND TRUE \read(tmp) [L295] CALL activatePump() [L314] pumpRunning = 1 [L295] RET activatePump() [L266] RET processEnvironment() [L272] CALL __utac_acc__Specification1_spec__1() [L152] int tmp ; [L153] int tmp___0 ; [L157] CALL, EXPR isMethaneLevelCritical() [L86] int retValue_acc ; [L89] retValue_acc = methaneLevelCritical [L90] return (retValue_acc); [L157] RET, EXPR isMethaneLevelCritical() [L157] tmp = isMethaneLevelCritical() [L159] COND TRUE \read(tmp) [L161] CALL, EXPR isPumpRunning() [L338] int retValue_acc ; [L341] retValue_acc = pumpRunning [L342] return (retValue_acc); [L161] RET, EXPR isPumpRunning() [L161] tmp___0 = isPumpRunning() [L163] COND TRUE \read(tmp___0) [L165] CALL __automaton_fail() [L145] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 38 procedures, 221 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.4s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 23.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 798 SDtfs, 1497 SDslu, 1045 SDs, 0 SdLazy, 4671 SolverSat, 936 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 260 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1167occurred 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: 1.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 1352 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 578 NumberOfCodeBlocks, 578 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 488 ConstructedInterpolants, 0 QuantifiedInterpolants, 143632 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...