/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_spec4_product40.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:12:33,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:12:33,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:12:33,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:12:33,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:12:33,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:12:33,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:12:33,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:12:33,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:12:33,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:12:33,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:12:33,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:12:33,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:12:33,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:12:33,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:12:33,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:12:33,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:12:33,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:12:33,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:12:33,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:12:33,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:12:33,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:12:33,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:12:33,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:12:33,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:12:33,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:12:33,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:12:33,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:12:33,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:12:33,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:12:33,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:12:33,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:12:33,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:12:33,677 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:12:33,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:12:33,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:12:33,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:12:33,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:12:33,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:12:33,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:12:33,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:12:33,683 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 17:12:33,729 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:12:33,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:12:33,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:12:33,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:12:33,731 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:12:33,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:12:33,732 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:12:33,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:12:33,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:12:33,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:12:33,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:12:33,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:12:33,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:12:33,733 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:12:33,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:12:33,734 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:12:33,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:12:33,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:12:33,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:12:33,735 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:12:33,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:12:33,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:12:33,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:12:33,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:12:33,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:12:33,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:12:33,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:12:33,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:12:33,737 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:12:33,737 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 17:12:34,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:12:34,048 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:12:34,052 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:12:34,054 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:12:34,054 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:12:34,055 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product40.cil.c [2020-08-21 17:12:34,120 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0701480b2/58030724993a47588bef5a016c31ba15/FLAG5a5068470 [2020-08-21 17:12:34,659 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:12:34,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product40.cil.c [2020-08-21 17:12:34,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0701480b2/58030724993a47588bef5a016c31ba15/FLAG5a5068470 [2020-08-21 17:12:35,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0701480b2/58030724993a47588bef5a016c31ba15 [2020-08-21 17:12:35,032 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:12:35,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:12:35,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:12:35,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:12:35,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:12:35,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:12:35" (1/1) ... [2020-08-21 17:12:35,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37aeb972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:12:35, skipping insertion in model container [2020-08-21 17:12:35,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:12:35" (1/1) ... [2020-08-21 17:12:35,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:12:35,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:12:35,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:12:35,523 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:12:35,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:12:35,702 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:12:35,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:12:35 WrapperNode [2020-08-21 17:12:35,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:12:35,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:12:35,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:12:35,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:12:35,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:12:35" (1/1) ... [2020-08-21 17:12:35,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:12:35" (1/1) ... [2020-08-21 17:12:35,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:12:35" (1/1) ... [2020-08-21 17:12:35,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:12:35" (1/1) ... [2020-08-21 17:12:35,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:12:35" (1/1) ... [2020-08-21 17:12:35,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:12:35" (1/1) ... [2020-08-21 17:12:35,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:12:35" (1/1) ... [2020-08-21 17:12:35,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:12:35,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:12:35,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:12:35,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:12:35,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:12:35" (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 17:12:35,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:12:35,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:12:35,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 17:12:35,877 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 17:12:35,878 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 17:12:35,878 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 17:12:35,878 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 17:12:35,878 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 17:12:35,878 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 17:12:35,879 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 17:12:35,880 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 17:12:35,880 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 17:12:35,880 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 17:12:35,880 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 17:12:35,880 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 17:12:35,881 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 17:12:35,881 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 17:12:35,882 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 17:12:35,882 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 17:12:35,882 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 17:12:35,882 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 17:12:35,882 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:12:35,883 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 17:12:35,883 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 17:12:35,883 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 17:12:35,884 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 17:12:35,884 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 17:12:35,884 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 17:12:35,885 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 17:12:35,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 17:12:35,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 17:12:35,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 17:12:35,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 17:12:35,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 17:12:35,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 17:12:35,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-21 17:12:35,886 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 17:12:35,886 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 17:12:35,886 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 17:12:35,887 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 17:12:35,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:12:35,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:12:35,887 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 17:12:35,887 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 17:12:35,889 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 17:12:35,889 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 17:12:35,889 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 17:12:35,889 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 17:12:35,890 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 17:12:35,890 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 17:12:35,890 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 17:12:35,890 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 17:12:35,890 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 17:12:35,891 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 17:12:35,891 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 17:12:35,891 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 17:12:35,891 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 17:12:35,891 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 17:12:35,892 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-21 17:12:35,892 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 17:12:35,892 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 17:12:35,892 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 17:12:35,892 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 17:12:35,892 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 17:12:35,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 17:12:35,893 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 17:12:35,893 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 17:12:35,893 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 17:12:35,893 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 17:12:35,893 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 17:12:35,893 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 17:12:35,894 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 17:12:35,895 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:12:35,895 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 17:12:35,895 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 17:12:35,896 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 17:12:35,896 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 17:12:35,897 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 17:12:35,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 17:12:35,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 17:12:35,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 17:12:35,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 17:12:35,897 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 17:12:35,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 17:12:35,898 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 17:12:35,898 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 17:12:35,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 17:12:35,898 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 17:12:35,898 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 17:12:35,898 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 17:12:35,899 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 17:12:35,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:12:35,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 17:12:35,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:12:36,984 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:12:36,985 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 17:12:36,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:12:36 BoogieIcfgContainer [2020-08-21 17:12:36,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:12:36,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:12:36,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:12:36,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:12:36,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:12:35" (1/3) ... [2020-08-21 17:12:36,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b698e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:12:36, skipping insertion in model container [2020-08-21 17:12:36,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:12:35" (2/3) ... [2020-08-21 17:12:36,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b698e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:12:36, skipping insertion in model container [2020-08-21 17:12:36,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:12:36" (3/3) ... [2020-08-21 17:12:36,998 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product40.cil.c [2020-08-21 17:12:37,009 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:12:37,017 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:12:37,031 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:12:37,057 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:12:37,057 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:12:37,057 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:12:37,057 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:12:37,057 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:12:37,058 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:12:37,058 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:12:37,058 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:12:37,081 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states. [2020-08-21 17:12:37,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 17:12:37,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:12:37,093 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 17:12:37,094 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:12:37,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:12:37,099 INFO L82 PathProgramCache]: Analyzing trace with hash -656044244, now seen corresponding path program 1 times [2020-08-21 17:12:37,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:12:37,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304927434] [2020-08-21 17:12:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:12:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:37,748 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:12:37,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:12:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:37,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:12:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:37,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:12:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:37,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:12:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:37,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:12:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:37,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:12:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:37,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 17:12:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:37,894 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 17:12:37,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304927434] [2020-08-21 17:12:37,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:12:37,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:12:37,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363157062] [2020-08-21 17:12:37,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:12:37,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:12:37,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:12:37,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:12:37,922 INFO L87 Difference]: Start difference. First operand 179 states. Second operand 3 states. [2020-08-21 17:12:39,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:12:39,135 INFO L93 Difference]: Finished difference Result 316 states and 411 transitions. [2020-08-21 17:12:39,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:12:39,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 17:12:39,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:12:39,153 INFO L225 Difference]: With dead ends: 316 [2020-08-21 17:12:39,153 INFO L226 Difference]: Without dead ends: 171 [2020-08-21 17:12:39,158 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 17:12:39,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-08-21 17:12:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2020-08-21 17:12:39,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 17:12:39,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2020-08-21 17:12:39,260 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 46 [2020-08-21 17:12:39,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:12:39,261 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2020-08-21 17:12:39,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:12:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2020-08-21 17:12:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 17:12:39,265 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:12:39,265 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 17:12:39,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:12:39,266 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:12:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:12:39,266 INFO L82 PathProgramCache]: Analyzing trace with hash 679222766, now seen corresponding path program 1 times [2020-08-21 17:12:39,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:12:39,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046780010] [2020-08-21 17:12:39,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:12:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:39,605 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:12:39,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:12:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:39,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:12:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:39,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:12:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:39,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:12:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:39,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:12:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:39,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:12:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:39,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:12:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:39,662 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 17:12:39,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046780010] [2020-08-21 17:12:39,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:12:39,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:12:39,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148375004] [2020-08-21 17:12:39,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:12:39,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:12:39,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:12:39,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:12:39,666 INFO L87 Difference]: Start difference. First operand 136 states and 159 transitions. Second operand 4 states. [2020-08-21 17:12:40,055 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:12:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:12:40,997 INFO L93 Difference]: Finished difference Result 239 states and 290 transitions. [2020-08-21 17:12:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:12:40,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 17:12:40,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:12:41,001 INFO L225 Difference]: With dead ends: 239 [2020-08-21 17:12:41,001 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 17:12:41,003 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 17:12:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 17:12:41,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 127. [2020-08-21 17:12:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-21 17:12:41,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2020-08-21 17:12:41,043 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 47 [2020-08-21 17:12:41,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:12:41,043 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2020-08-21 17:12:41,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:12:41,043 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2020-08-21 17:12:41,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 17:12:41,045 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:12:41,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:12:41,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:12:41,046 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:12:41,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:12:41,047 INFO L82 PathProgramCache]: Analyzing trace with hash 496169114, now seen corresponding path program 1 times [2020-08-21 17:12:41,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:12:41,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366431155] [2020-08-21 17:12:41,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:12:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:41,356 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:12:41,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:12:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:41,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:12:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:41,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:12:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:41,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:12:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:41,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:12:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:41,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 17:12:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:41,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 17:12:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:41,428 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 17:12:41,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366431155] [2020-08-21 17:12:41,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:12:41,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:12:41,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197456645] [2020-08-21 17:12:41,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:12:41,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:12:41,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:12:41,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:12:41,432 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand 8 states. [2020-08-21 17:12:41,757 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:12:42,072 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:12:42,312 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:12:42,540 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:12:43,264 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:12:45,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:12:45,017 INFO L93 Difference]: Finished difference Result 436 states and 538 transitions. [2020-08-21 17:12:45,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:12:45,018 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 17:12:45,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:12:45,025 INFO L225 Difference]: With dead ends: 436 [2020-08-21 17:12:45,026 INFO L226 Difference]: Without dead ends: 333 [2020-08-21 17:12:45,031 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 17:12:45,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-08-21 17:12:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 268. [2020-08-21 17:12:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-21 17:12:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 322 transitions. [2020-08-21 17:12:45,121 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 322 transitions. Word has length 52 [2020-08-21 17:12:45,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:12:45,121 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 322 transitions. [2020-08-21 17:12:45,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:12:45,121 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 322 transitions. [2020-08-21 17:12:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:12:45,124 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:12:45,124 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 17:12:45,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:12:45,124 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:12:45,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:12:45,125 INFO L82 PathProgramCache]: Analyzing trace with hash 987448314, now seen corresponding path program 1 times [2020-08-21 17:12:45,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:12:45,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147567494] [2020-08-21 17:12:45,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:12:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:45,416 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:12:45,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:12:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:45,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:12:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:45,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:12:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:45,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:12:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:45,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:12:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:45,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:12:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:45,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:12:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:45,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 17:12:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:45,533 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 17:12:45,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147567494] [2020-08-21 17:12:45,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:12:45,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 17:12:45,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350971712] [2020-08-21 17:12:45,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:12:45,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:12:45,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:12:45,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:12:45,536 INFO L87 Difference]: Start difference. First operand 268 states and 322 transitions. Second operand 12 states. [2020-08-21 17:12:45,894 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:12:46,187 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:12:46,468 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:12:46,698 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:12:47,217 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:12:47,968 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:12:48,337 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:12:48,641 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:12:48,930 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:12:49,305 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:12:49,731 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:12:50,043 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:12:50,302 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:12:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:12:52,246 INFO L93 Difference]: Finished difference Result 1085 states and 1492 transitions. [2020-08-21 17:12:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 17:12:52,247 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-21 17:12:52,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:12:52,257 INFO L225 Difference]: With dead ends: 1085 [2020-08-21 17:12:52,258 INFO L226 Difference]: Without dead ends: 841 [2020-08-21 17:12:52,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-21 17:12:52,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2020-08-21 17:12:52,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 744. [2020-08-21 17:12:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-08-21 17:12:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 944 transitions. [2020-08-21 17:12:52,481 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 944 transitions. Word has length 57 [2020-08-21 17:12:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:12:52,481 INFO L479 AbstractCegarLoop]: Abstraction has 744 states and 944 transitions. [2020-08-21 17:12:52,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:12:52,482 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 944 transitions. [2020-08-21 17:12:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 17:12:52,491 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:12:52,491 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 17:12:52,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:12:52,492 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:12:52,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:12:52,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1158385600, now seen corresponding path program 1 times [2020-08-21 17:12:52,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:12:52,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806848409] [2020-08-21 17:12:52,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:12:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:52,742 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:12:52,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:12:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:52,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:12:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:52,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:12:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:52,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:12:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:52,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:12:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:52,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:12:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:52,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:12:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:52,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:12:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:52,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 17:12:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:52,827 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 17:12:52,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806848409] [2020-08-21 17:12:52,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:12:52,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:12:52,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683040194] [2020-08-21 17:12:52,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:12:52,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:12:52,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:12:52,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:12:52,830 INFO L87 Difference]: Start difference. First operand 744 states and 944 transitions. Second operand 6 states. [2020-08-21 17:12:53,085 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:12:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:12:54,556 INFO L93 Difference]: Finished difference Result 1799 states and 2451 transitions. [2020-08-21 17:12:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:12:54,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-21 17:12:54,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:12:54,568 INFO L225 Difference]: With dead ends: 1799 [2020-08-21 17:12:54,568 INFO L226 Difference]: Without dead ends: 1079 [2020-08-21 17:12:54,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:12:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2020-08-21 17:12:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 988. [2020-08-21 17:12:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2020-08-21 17:12:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1244 transitions. [2020-08-21 17:12:54,800 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1244 transitions. Word has length 61 [2020-08-21 17:12:54,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:12:54,801 INFO L479 AbstractCegarLoop]: Abstraction has 988 states and 1244 transitions. [2020-08-21 17:12:54,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:12:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1244 transitions. [2020-08-21 17:12:54,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 17:12:54,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:12:54,806 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:12:54,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:12:54,806 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:12:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:12:54,807 INFO L82 PathProgramCache]: Analyzing trace with hash -623744306, now seen corresponding path program 1 times [2020-08-21 17:12:54,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:12:54,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629872850] [2020-08-21 17:12:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:12:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:55,078 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:12:55,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:12:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:55,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:12:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:55,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:12:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:55,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:12:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:55,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:12:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:55,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:12:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:55,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:12:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:55,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 17:12:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:55,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:12:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:55,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:12:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:55,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 17:12:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:55,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 17:12:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:55,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 17:12:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:12:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 17:12:55,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629872850] [2020-08-21 17:12:55,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:12:55,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:12:55,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407773640] [2020-08-21 17:12:55,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:12:55,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:12:55,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:12:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:12:55,250 INFO L87 Difference]: Start difference. First operand 988 states and 1244 transitions. Second operand 10 states. [2020-08-21 17:12:55,981 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-21 17:12:56,554 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:12:58,538 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:00,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:00,326 INFO L93 Difference]: Finished difference Result 1921 states and 2525 transitions. [2020-08-21 17:13:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 17:13:00,327 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-21 17:13:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:00,335 INFO L225 Difference]: With dead ends: 1921 [2020-08-21 17:13:00,336 INFO L226 Difference]: Without dead ends: 1208 [2020-08-21 17:13:00,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-21 17:13:00,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2020-08-21 17:13:00,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1095. [2020-08-21 17:13:00,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1095 states. [2020-08-21 17:13:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1355 transitions. [2020-08-21 17:13:00,588 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1355 transitions. Word has length 89 [2020-08-21 17:13:00,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:00,591 INFO L479 AbstractCegarLoop]: Abstraction has 1095 states and 1355 transitions. [2020-08-21 17:13:00,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:13:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1355 transitions. [2020-08-21 17:13:00,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-21 17:13:00,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:00,597 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:13:00,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:13:00,597 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:00,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:00,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1382968030, now seen corresponding path program 1 times [2020-08-21 17:13:00,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:00,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955936512] [2020-08-21 17:13:00,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:00,875 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:00,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:00,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:00,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:00,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:00,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:00,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:13:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:00,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:00,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:00,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:00,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:01,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:13:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:01,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:13:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:01,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:01,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 17:13:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:01,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 17:13:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:01,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 17:13:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:01,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:01,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:01,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 17:13:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:01,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 17:13:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:01,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-21 17:13:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 17:13:01,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955936512] [2020-08-21 17:13:01,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:13:01,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 17:13:01,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148461802] [2020-08-21 17:13:01,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:13:01,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:01,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:13:01,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:13:01,102 INFO L87 Difference]: Start difference. First operand 1095 states and 1355 transitions. Second operand 12 states. [2020-08-21 17:13:01,628 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:01,870 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:02,135 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:02,852 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:03,091 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:03,315 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:04,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:04,438 INFO L93 Difference]: Finished difference Result 2280 states and 2962 transitions. [2020-08-21 17:13:04,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 17:13:04,439 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 132 [2020-08-21 17:13:04,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:04,447 INFO L225 Difference]: With dead ends: 2280 [2020-08-21 17:13:04,447 INFO L226 Difference]: Without dead ends: 1209 [2020-08-21 17:13:04,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 17:13:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2020-08-21 17:13:04,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1095. [2020-08-21 17:13:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1095 states. [2020-08-21 17:13:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1351 transitions. [2020-08-21 17:13:04,692 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1351 transitions. Word has length 132 [2020-08-21 17:13:04,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:04,693 INFO L479 AbstractCegarLoop]: Abstraction has 1095 states and 1351 transitions. [2020-08-21 17:13:04,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:13:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1351 transitions. [2020-08-21 17:13:04,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-21 17:13:04,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:04,699 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:13:04,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:13:04,700 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:04,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1689143082, now seen corresponding path program 1 times [2020-08-21 17:13:04,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:04,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777313966] [2020-08-21 17:13:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:04,965 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:04,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:04,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:04,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:04,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:04,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:13:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:13:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:13:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 17:13:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 17:13:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 17:13:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 17:13:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-21 17:13:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 17:13:05,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777313966] [2020-08-21 17:13:05,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:13:05,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:13:05,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171479253] [2020-08-21 17:13:05,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:13:05,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:05,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:13:05,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:13:05,135 INFO L87 Difference]: Start difference. First operand 1095 states and 1351 transitions. Second operand 10 states. [2020-08-21 17:13:06,162 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:06,453 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:13:06,712 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:06,942 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:07,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:07,740 INFO L93 Difference]: Finished difference Result 2085 states and 2647 transitions. [2020-08-21 17:13:07,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:13:07,741 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 128 [2020-08-21 17:13:07,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:07,748 INFO L225 Difference]: With dead ends: 2085 [2020-08-21 17:13:07,748 INFO L226 Difference]: Without dead ends: 1014 [2020-08-21 17:13:07,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:13:07,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2020-08-21 17:13:07,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 956. [2020-08-21 17:13:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956 states. [2020-08-21 17:13:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1156 transitions. [2020-08-21 17:13:07,983 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1156 transitions. Word has length 128 [2020-08-21 17:13:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:07,984 INFO L479 AbstractCegarLoop]: Abstraction has 956 states and 1156 transitions. [2020-08-21 17:13:07,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:13:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1156 transitions. [2020-08-21 17:13:07,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-21 17:13:07,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:07,990 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:13:07,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:13:07,991 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:07,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:07,991 INFO L82 PathProgramCache]: Analyzing trace with hash -855657151, now seen corresponding path program 1 times [2020-08-21 17:13:07,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:07,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62294586] [2020-08-21 17:13:07,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,271 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:08,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:13:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:13:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:13:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:13:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 17:13:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 17:13:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 17:13:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 17:13:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-21 17:13:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 17:13:08,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62294586] [2020-08-21 17:13:08,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:13:08,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 17:13:08,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848073268] [2020-08-21 17:13:08,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 17:13:08,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:08,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 17:13:08,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:13:08,502 INFO L87 Difference]: Start difference. First operand 956 states and 1156 transitions. Second operand 13 states. [2020-08-21 17:13:09,158 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:10,064 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:12,161 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:12,437 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:12,687 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:12,927 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:13:13,187 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:13,428 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:13:13,655 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:13,884 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:13:14,140 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:13:14,423 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:13:15,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:15,108 INFO L93 Difference]: Finished difference Result 2764 states and 3470 transitions. [2020-08-21 17:13:15,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 17:13:15,109 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 132 [2020-08-21 17:13:15,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:15,120 INFO L225 Difference]: With dead ends: 2764 [2020-08-21 17:13:15,120 INFO L226 Difference]: Without dead ends: 1832 [2020-08-21 17:13:15,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 17:13:15,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2020-08-21 17:13:15,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1727. [2020-08-21 17:13:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1727 states. [2020-08-21 17:13:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2059 transitions. [2020-08-21 17:13:15,485 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2059 transitions. Word has length 132 [2020-08-21 17:13:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:15,486 INFO L479 AbstractCegarLoop]: Abstraction has 1727 states and 2059 transitions. [2020-08-21 17:13:15,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 17:13:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2059 transitions. [2020-08-21 17:13:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-21 17:13:15,492 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:15,492 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:13:15,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:13:15,492 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash -242335011, now seen corresponding path program 1 times [2020-08-21 17:13:15,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:15,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937778965] [2020-08-21 17:13:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,822 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:15,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:13:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 17:13:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 17:13:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:13:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:13:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 17:13:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 17:13:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 17:13:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-21 17:13:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:15,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-21 17:13:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 17:13:16,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937778965] [2020-08-21 17:13:16,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:13:16,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 17:13:16,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491971028] [2020-08-21 17:13:16,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 17:13:16,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:16,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 17:13:16,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:13:16,012 INFO L87 Difference]: Start difference. First operand 1727 states and 2059 transitions. Second operand 11 states. [2020-08-21 17:13:16,548 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:18,820 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:19,043 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:19,288 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:19,582 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:19,824 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:13:20,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:20,277 INFO L93 Difference]: Finished difference Result 2058 states and 2631 transitions. [2020-08-21 17:13:20,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 17:13:20,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-21 17:13:20,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:20,289 INFO L225 Difference]: With dead ends: 2058 [2020-08-21 17:13:20,290 INFO L226 Difference]: Without dead ends: 2055 [2020-08-21 17:13:20,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-08-21 17:13:20,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2020-08-21 17:13:20,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 1727. [2020-08-21 17:13:20,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1727 states. [2020-08-21 17:13:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2049 transitions. [2020-08-21 17:13:20,695 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2049 transitions. Word has length 136 [2020-08-21 17:13:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:20,696 INFO L479 AbstractCegarLoop]: Abstraction has 1727 states and 2049 transitions. [2020-08-21 17:13:20,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 17:13:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2049 transitions. [2020-08-21 17:13:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-21 17:13:20,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:20,702 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:13:20,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:13:20,703 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:20,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2128978130, now seen corresponding path program 1 times [2020-08-21 17:13:20,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:20,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032026724] [2020-08-21 17:13:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:20,995 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:13:20,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:13:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:13:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:13:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:13:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:13:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:13:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:13:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:13:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:13:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 17:13:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 17:13:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:13:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-21 17:13:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:13:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-21 17:13:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-21 17:13:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:13:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 17:13:21,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032026724] [2020-08-21 17:13:21,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:13:21,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 17:13:21,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613428876] [2020-08-21 17:13:21,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:13:21,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:13:21,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:13:21,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:13:21,180 INFO L87 Difference]: Start difference. First operand 1727 states and 2049 transitions. Second operand 12 states. [2020-08-21 17:13:21,739 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:22,334 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:22,884 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:23,156 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:23,392 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:23,658 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:13:23,952 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:13:24,211 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:13:26,072 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:13:26,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:13:26,826 INFO L93 Difference]: Finished difference Result 4160 states and 5347 transitions. [2020-08-21 17:13:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 17:13:26,827 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 136 [2020-08-21 17:13:26,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:13:26,843 INFO L225 Difference]: With dead ends: 4160 [2020-08-21 17:13:26,843 INFO L226 Difference]: Without dead ends: 2775 [2020-08-21 17:13:26,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-08-21 17:13:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-08-21 17:13:27,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2303. [2020-08-21 17:13:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2303 states. [2020-08-21 17:13:27,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2786 transitions. [2020-08-21 17:13:27,297 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2786 transitions. Word has length 136 [2020-08-21 17:13:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:13:27,301 INFO L479 AbstractCegarLoop]: Abstraction has 2303 states and 2786 transitions. [2020-08-21 17:13:27,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:13:27,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2786 transitions. [2020-08-21 17:13:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-08-21 17:13:27,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:13:27,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:13:27,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:13:27,313 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:13:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:13:27,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2052523815, now seen corresponding path program 2 times [2020-08-21 17:13:27,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:13:27,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922401744] [2020-08-21 17:13:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:13:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 17:13:27,419 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 17:13:27,419 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 17:13:27,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 17:13:27,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:13:27 BoogieIcfgContainer [2020-08-21 17:13:27,500 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:13:27,502 INFO L168 Benchmark]: Toolchain (without parser) took 52468.07 ms. Allocated memory was 141.6 MB in the beginning and 964.7 MB in the end (delta: 823.1 MB). Free memory was 102.7 MB in the beginning and 95.8 MB in the end (delta: 6.9 MB). Peak memory consumption was 830.0 MB. Max. memory is 7.1 GB. [2020-08-21 17:13:27,503 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 17:13:27,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 668.03 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 102.5 MB in the beginning and 171.3 MB in the end (delta: -68.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-08-21 17:13:27,505 INFO L168 Benchmark]: Boogie Preprocessor took 93.71 ms. Allocated memory is still 205.0 MB. Free memory was 171.3 MB in the beginning and 166.8 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 7.1 GB. [2020-08-21 17:13:27,510 INFO L168 Benchmark]: RCFGBuilder took 1192.93 ms. Allocated memory was 205.0 MB in the beginning and 235.4 MB in the end (delta: 30.4 MB). Free memory was 166.8 MB in the beginning and 191.3 MB in the end (delta: -24.5 MB). Peak memory consumption was 78.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:13:27,510 INFO L168 Benchmark]: TraceAbstraction took 50508.41 ms. Allocated memory was 235.4 MB in the beginning and 964.7 MB in the end (delta: 729.3 MB). Free memory was 189.9 MB in the beginning and 95.8 MB in the end (delta: 94.1 MB). Peak memory consumption was 823.4 MB. Max. memory is 7.1 GB. [2020-08-21 17:13:27,518 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 668.03 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 102.5 MB in the beginning and 171.3 MB in the end (delta: -68.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 93.71 ms. Allocated memory is still 205.0 MB. Free memory was 171.3 MB in the beginning and 166.8 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1192.93 ms. Allocated memory was 205.0 MB in the beginning and 235.4 MB in the end (delta: 30.4 MB). Free memory was 166.8 MB in the beginning and 191.3 MB in the end (delta: -24.5 MB). Peak memory consumption was 78.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 50508.41 ms. Allocated memory was 235.4 MB in the beginning and 964.7 MB in the end (delta: 729.3 MB). Free memory was 189.9 MB in the beginning and 95.8 MB in the end (delta: 94.1 MB). Peak memory consumption was 823.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 329]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L123] int pumpRunning = 0; [L124] int systemActive = 1; [L334] int cleanupTimeShifts = 4; [L434] int waterLevel = 1; [L435] int methaneLevelCritical = 0; [L697] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L410] int retValue_acc ; [L411] int tmp ; [L415] FCALL select_helpers() [L416] FCALL select_features() [L417] CALL, EXPR valid_product() [L946] int retValue_acc ; [L949] retValue_acc = 1 [L950] return (retValue_acc); [L417] RET, EXPR valid_product() [L417] tmp = valid_product() [L419] COND TRUE \read(tmp) [L421] FCALL setup() [L422] CALL runTest() [L401] CALL test() [L47] int splverifierCounter ; [L48] int tmp ; [L49] int tmp___0 ; [L50] int tmp___1 ; [L51] int tmp___2 ; [L54] splverifierCounter = 0 [L56] COND TRUE 1 [L58] COND TRUE splverifierCounter < 4 [L64] tmp = __VERIFIER_nondet_int() [L66] COND TRUE \read(tmp) [L68] CALL waterRise() [L452] COND TRUE waterLevel < 2 [L453] waterLevel = waterLevel + 1 [L68] RET waterRise() [L74] tmp___0 = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp___0)) [L84] tmp___2 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___2)) [L92] tmp___1 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___1)) [L103] CALL timeShift() [L131] COND FALSE !(\read(pumpRunning)) [L138] COND TRUE \read(systemActive) [L140] CALL processEnvironment() [L186] int tmp ; [L189] COND FALSE !(\read(pumpRunning)) [L204] CALL processEnvironment__wrappee__highWaterSensor() [L160] int tmp ; [L163] COND TRUE ! pumpRunning [L165] CALL, EXPR isHighWaterLevel() [L283] int retValue_acc ; [L284] int tmp ; [L285] int tmp___0 ; [L289] CALL, EXPR isHighWaterSensorDry() [L514] int retValue_acc ; [L517] COND FALSE !(waterLevel < 2) [L521] retValue_acc = 0 [L522] return (retValue_acc); [L289] RET, EXPR isHighWaterSensorDry() [L289] tmp = isHighWaterSensorDry() [L291] COND FALSE !(\read(tmp)) [L294] tmp___0 = 1 [L296] retValue_acc = tmp___0 [L297] return (retValue_acc); [L165] RET, EXPR isHighWaterLevel() [L165] tmp = isHighWaterLevel() [L167] COND TRUE \read(tmp) [L169] CALL activatePump() [L214] pumpRunning = 1 [L169] RET activatePump() [L204] RET processEnvironment__wrappee__highWaterSensor() [L140] RET processEnvironment() [L146] CALL __utac_acc__Specification4_spec__1() [L895] int tmp ; [L896] int tmp___0 ; [L900] CALL, EXPR getWaterLevel() [L505] int retValue_acc ; [L508] retValue_acc = waterLevel [L509] return (retValue_acc); [L900] RET, EXPR getWaterLevel() [L900] tmp = getWaterLevel() [L902] COND FALSE !(tmp == 0) [L146] RET __utac_acc__Specification4_spec__1() [L103] RET timeShift() [L56] COND TRUE 1 [L58] COND TRUE splverifierCounter < 4 [L64] tmp = __VERIFIER_nondet_int() [L66] COND FALSE !(\read(tmp)) [L74] tmp___0 = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp___0)) [L84] tmp___2 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___2)) [L92] tmp___1 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___1)) [L103] CALL timeShift() [L131] COND TRUE \read(pumpRunning) [L133] CALL lowerWaterLevel() [L440] COND TRUE waterLevel > 0 [L441] waterLevel = waterLevel - 1 [L133] RET lowerWaterLevel() [L138] COND TRUE \read(systemActive) [L140] CALL processEnvironment() [L186] int tmp ; [L189] COND TRUE \read(pumpRunning) [L191] CALL, EXPR isMethaneAlarm() [L227] int retValue_acc ; [L231] CALL, EXPR isMethaneLevelCritical() [L473] int retValue_acc ; [L476] retValue_acc = methaneLevelCritical [L477] return (retValue_acc); [L231] RET, EXPR isMethaneLevelCritical() [L231] retValue_acc = isMethaneLevelCritical() [L233] return (retValue_acc); [L191] RET, EXPR isMethaneAlarm() [L191] tmp = isMethaneAlarm() [L193] COND FALSE !(\read(tmp)) [L199] CALL processEnvironment__wrappee__highWaterSensor() [L160] int tmp ; [L163] COND FALSE !(! pumpRunning) [L178] FCALL processEnvironment__wrappee__base() [L199] RET processEnvironment__wrappee__highWaterSensor() [L140] RET processEnvironment() [L146] CALL __utac_acc__Specification4_spec__1() [L895] int tmp ; [L896] int tmp___0 ; [L900] CALL, EXPR getWaterLevel() [L505] int retValue_acc ; [L508] retValue_acc = waterLevel [L509] return (retValue_acc); [L900] RET, EXPR getWaterLevel() [L900] tmp = getWaterLevel() [L902] COND FALSE !(tmp == 0) [L146] RET __utac_acc__Specification4_spec__1() [L103] RET timeShift() [L56] COND TRUE 1 [L58] COND TRUE splverifierCounter < 4 [L64] tmp = __VERIFIER_nondet_int() [L66] COND FALSE !(\read(tmp)) [L74] tmp___0 = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp___0)) [L84] tmp___2 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___2)) [L92] tmp___1 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___1)) [L103] CALL timeShift() [L131] COND TRUE \read(pumpRunning) [L133] CALL lowerWaterLevel() [L440] COND TRUE waterLevel > 0 [L441] waterLevel = waterLevel - 1 [L133] RET lowerWaterLevel() [L138] COND TRUE \read(systemActive) [L140] CALL processEnvironment() [L186] int tmp ; [L189] COND TRUE \read(pumpRunning) [L191] CALL, EXPR isMethaneAlarm() [L227] int retValue_acc ; [L231] CALL, EXPR isMethaneLevelCritical() [L473] int retValue_acc ; [L476] retValue_acc = methaneLevelCritical [L477] return (retValue_acc); [L231] RET, EXPR isMethaneLevelCritical() [L231] retValue_acc = isMethaneLevelCritical() [L233] return (retValue_acc); [L191] RET, EXPR isMethaneAlarm() [L191] tmp = isMethaneAlarm() [L193] COND FALSE !(\read(tmp)) [L199] CALL processEnvironment__wrappee__highWaterSensor() [L160] int tmp ; [L163] COND FALSE !(! pumpRunning) [L178] FCALL processEnvironment__wrappee__base() [L199] RET processEnvironment__wrappee__highWaterSensor() [L140] RET processEnvironment() [L146] CALL __utac_acc__Specification4_spec__1() [L895] int tmp ; [L896] int tmp___0 ; [L900] CALL, EXPR getWaterLevel() [L505] int retValue_acc ; [L508] retValue_acc = waterLevel [L509] return (retValue_acc); [L900] RET, EXPR getWaterLevel() [L900] tmp = getWaterLevel() [L902] COND TRUE tmp == 0 [L904] CALL, EXPR isPumpRunning() [L238] int retValue_acc ; [L241] retValue_acc = pumpRunning [L242] return (retValue_acc); [L904] RET, EXPR isPumpRunning() [L904] tmp___0 = isPumpRunning() [L906] COND TRUE \read(tmp___0) [L908] CALL __automaton_fail() [L329] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 40 procedures, 235 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 50.3s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 42.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1503 SDtfs, 4060 SDslu, 1841 SDs, 0 SdLazy, 10936 SolverSat, 2953 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 547 GetRequests, 356 SyntacticMatches, 7 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 17.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2303occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 11 MinimizatonAttempts, 1506 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 1204 NumberOfCodeBlocks, 1204 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1005 ConstructedInterpolants, 0 QuantifiedInterpolants, 359743 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 134/153 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...