/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=LOWLEXORDER --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_product34.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:00:39,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:00:39,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:00:39,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:00:39,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:00:39,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:00:39,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:00:39,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:00:39,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:00:39,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:00:39,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:00:39,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:00:39,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:00:39,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:00:39,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:00:39,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:00:39,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:00:39,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:00:39,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:00:39,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:00:39,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:00:39,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:00:39,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:00:39,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:00:39,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:00:39,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:00:39,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:00:39,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:00:39,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:00:39,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:00:39,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:00:39,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:00:39,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:00:39,699 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:00:39,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:00:39,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:00:39,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:00:39,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:00:39,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:00:39,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:00:39,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:00:39,704 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 18:00:39,726 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:00:39,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:00:39,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:00:39,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:00:39,728 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:00:39,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:00:39,729 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:00:39,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:00:39,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:00:39,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:00:39,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:00:39,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:00:39,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:00:39,730 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:00:39,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:00:39,730 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:00:39,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:00:39,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:00:39,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:00:39,731 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:00:39,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:00:39,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:00:39,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:00:39,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:00:39,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:00:39,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:00:39,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:00:39,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:00:39,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:00:39,733 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=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:00:40,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:00:40,072 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:00:40,079 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:00:40,081 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:00:40,081 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:00:40,082 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product34.cil.c [2020-08-21 18:00:40,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1876026f9/ac8f98d03ebe42b1b4359b3b98e38fdf/FLAG78b913c51 [2020-08-21 18:00:40,656 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:00:40,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product34.cil.c [2020-08-21 18:00:40,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1876026f9/ac8f98d03ebe42b1b4359b3b98e38fdf/FLAG78b913c51 [2020-08-21 18:00:40,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1876026f9/ac8f98d03ebe42b1b4359b3b98e38fdf [2020-08-21 18:00:40,960 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:00:40,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:00:40,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:00:40,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:00:40,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:00:40,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:00:40" (1/1) ... [2020-08-21 18:00:40,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@574fe713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:00:40, skipping insertion in model container [2020-08-21 18:00:40,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:00:40" (1/1) ... [2020-08-21 18:00:40,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:00:41,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:00:41,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:00:41,403 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:00:41,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:00:41,647 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:00:41,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:00:41 WrapperNode [2020-08-21 18:00:41,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:00:41,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:00:41,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:00:41,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:00:41,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:00:41" (1/1) ... [2020-08-21 18:00:41,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:00:41" (1/1) ... [2020-08-21 18:00:41,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:00:41" (1/1) ... [2020-08-21 18:00:41,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:00:41" (1/1) ... [2020-08-21 18:00:41,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:00:41" (1/1) ... [2020-08-21 18:00:41,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:00:41" (1/1) ... [2020-08-21 18:00:41,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:00:41" (1/1) ... [2020-08-21 18:00:41,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:00:41,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:00:41,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:00:41,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:00:41,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:00:41" (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 18:00:41,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:00:41,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:00:41,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 18:00:41,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-21 18:00:41,833 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 18:00:41,833 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 18:00:41,833 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 18:00:41,834 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 18:00:41,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:00:41,835 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 18:00:41,835 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 18:00:41,835 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 18:00:41,835 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 18:00:41,835 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 18:00:41,835 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 18:00:41,836 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 18:00:41,836 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 18:00:41,837 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 18:00:41,837 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 18:00:41,837 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 18:00:41,837 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 18:00:41,837 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 18:00:41,837 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 18:00:41,838 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 18:00:41,838 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 18:00:41,839 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 18:00:41,839 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 18:00:41,840 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 18:00:41,840 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 18:00:41,840 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 18:00:41,840 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 18:00:41,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 18:00:41,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 18:00:41,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 18:00:41,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 18:00:41,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 18:00:41,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 18:00:41,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 18:00:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:00:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:00:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 18:00:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 18:00:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 18:00:41,842 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 18:00:41,844 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-21 18:00:41,845 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 18:00:41,845 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 18:00:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 18:00:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 18:00:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 18:00:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 18:00:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 18:00:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 18:00:41,847 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 18:00:41,847 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 18:00:41,847 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 18:00:41,847 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 18:00:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:00:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 18:00:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 18:00:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 18:00:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 18:00:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 18:00:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 18:00:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 18:00:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 18:00:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 18:00:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 18:00:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 18:00:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 18:00:41,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 18:00:41,851 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 18:00:41,851 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 18:00:41,851 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 18:00:41,852 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 18:00:41,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 18:00:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 18:00:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 18:00:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 18:00:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 18:00:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 18:00:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 18:00:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 18:00:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 18:00:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 18:00:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 18:00:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 18:00:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:00:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 18:00:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:00:42,893 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:00:42,894 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 18:00:42,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:00:42 BoogieIcfgContainer [2020-08-21 18:00:42,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:00:42,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:00:42,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:00:42,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:00:42,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:00:40" (1/3) ... [2020-08-21 18:00:42,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a5203a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:00:42, skipping insertion in model container [2020-08-21 18:00:42,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:00:41" (2/3) ... [2020-08-21 18:00:42,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a5203a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:00:42, skipping insertion in model container [2020-08-21 18:00:42,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:00:42" (3/3) ... [2020-08-21 18:00:42,913 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product34.cil.c [2020-08-21 18:00:42,924 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:00:42,933 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:00:42,946 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:00:42,971 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:00:42,971 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:00:42,972 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:00:42,972 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:00:42,972 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:00:42,972 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:00:42,972 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:00:42,973 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:00:42,996 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-08-21 18:00:43,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 18:00:43,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:00:43,007 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 18:00:43,008 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:00:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:00:43,014 INFO L82 PathProgramCache]: Analyzing trace with hash -368094870, now seen corresponding path program 1 times [2020-08-21 18:00:43,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:00:43,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908005563] [2020-08-21 18:00:43,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:00:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:43,737 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:00:43,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:00:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:43,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:00:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:43,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:00:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:43,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:00:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:43,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:00:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:43,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 18:00:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:43,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 18:00:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:43,822 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 18:00:43,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908005563] [2020-08-21 18:00:43,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:00:43,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:00:43,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98457856] [2020-08-21 18:00:43,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:00:43,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:00:43,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:00:43,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:00:43,851 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 3 states. [2020-08-21 18:00:44,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:00:44,932 INFO L93 Difference]: Finished difference Result 258 states and 341 transitions. [2020-08-21 18:00:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:00:44,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 18:00:44,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:00:44,951 INFO L225 Difference]: With dead ends: 258 [2020-08-21 18:00:44,951 INFO L226 Difference]: Without dead ends: 140 [2020-08-21 18:00:44,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:00:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-21 18:00:45,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2020-08-21 18:00:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-21 18:00:45,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2020-08-21 18:00:45,102 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 46 [2020-08-21 18:00:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:00:45,103 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2020-08-21 18:00:45,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:00:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2020-08-21 18:00:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 18:00:45,110 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:00:45,110 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 18:00:45,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:00:45,111 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:00:45,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:00:45,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1630578526, now seen corresponding path program 1 times [2020-08-21 18:00:45,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:00:45,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557947893] [2020-08-21 18:00:45,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:00:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:45,432 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:00:45,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:00:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:45,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:00:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:45,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:00:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:45,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:00:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:45,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:00:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:45,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 18:00:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:45,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 18:00:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:45,476 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 18:00:45,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557947893] [2020-08-21 18:00:45,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:00:45,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 18:00:45,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127872945] [2020-08-21 18:00:45,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:00:45,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:00:45,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:00:45,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:00:45,481 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand 4 states. [2020-08-21 18:00:45,931 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:00:46,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:00:46,578 INFO L93 Difference]: Finished difference Result 187 states and 228 transitions. [2020-08-21 18:00:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:00:46,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 18:00:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:00:46,582 INFO L225 Difference]: With dead ends: 187 [2020-08-21 18:00:46,582 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 18:00:46,584 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 18:00:46,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 18:00:46,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2020-08-21 18:00:46,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-21 18:00:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2020-08-21 18:00:46,614 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 47 [2020-08-21 18:00:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:00:46,615 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2020-08-21 18:00:46,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:00:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2020-08-21 18:00:46,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 18:00:46,617 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:00:46,617 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 18:00:46,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:00:46,618 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:00:46,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:00:46,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1910957979, now seen corresponding path program 1 times [2020-08-21 18:00:46,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:00:46,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179626183] [2020-08-21 18:00:46,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:00:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:46,922 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:00:46,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:00:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:46,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:00:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:46,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:00:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:46,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:00:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:47,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:00:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:47,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 18:00:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:47,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 18:00:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:47,024 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 18:00:47,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179626183] [2020-08-21 18:00:47,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:00:47,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 18:00:47,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091607094] [2020-08-21 18:00:47,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:00:47,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:00:47,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:00:47,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:00:47,028 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand 8 states. [2020-08-21 18:00:47,425 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:00:47,718 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:00:47,961 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:00:48,199 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:00:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:00:49,107 INFO L93 Difference]: Finished difference Result 200 states and 246 transitions. [2020-08-21 18:00:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:00:49,108 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 18:00:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:00:49,110 INFO L225 Difference]: With dead ends: 200 [2020-08-21 18:00:49,111 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 18:00:49,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:00:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 18:00:49,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2020-08-21 18:00:49,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-21 18:00:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-08-21 18:00:49,142 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 52 [2020-08-21 18:00:49,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:00:49,143 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-08-21 18:00:49,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:00:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-08-21 18:00:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 18:00:49,145 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:00:49,145 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] [2020-08-21 18:00:49,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:00:49,146 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:00:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:00:49,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2015382800, now seen corresponding path program 1 times [2020-08-21 18:00:49,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:00:49,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038671434] [2020-08-21 18:00:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:00:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:49,419 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:00:49,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:00:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:49,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:00:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:49,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:00:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:49,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:00:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:49,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:00:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:49,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 18:00:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:49,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:00:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:49,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 18:00:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:49,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-21 18:00:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:49,506 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 18:00:49,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038671434] [2020-08-21 18:00:49,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:00:49,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 18:00:49,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63686008] [2020-08-21 18:00:49,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:00:49,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:00:49,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:00:49,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:00:49,509 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 6 states. [2020-08-21 18:00:49,847 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:00:50,929 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:00:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:00:51,355 INFO L93 Difference]: Finished difference Result 288 states and 356 transitions. [2020-08-21 18:00:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:00:51,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-08-21 18:00:51,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:00:51,359 INFO L225 Difference]: With dead ends: 288 [2020-08-21 18:00:51,359 INFO L226 Difference]: Without dead ends: 212 [2020-08-21 18:00:51,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:00:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-08-21 18:00:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 169. [2020-08-21 18:00:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-08-21 18:00:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 193 transitions. [2020-08-21 18:00:51,400 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 193 transitions. Word has length 60 [2020-08-21 18:00:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:00:51,401 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 193 transitions. [2020-08-21 18:00:51,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:00:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 193 transitions. [2020-08-21 18:00:51,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-21 18:00:51,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:00:51,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:00:51,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:00:51,403 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:00:51,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:00:51,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2082850905, now seen corresponding path program 1 times [2020-08-21 18:00:51,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:00:51,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269862468] [2020-08-21 18:00:51,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:00:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:51,734 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:00:51,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:00:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:51,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:00:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:51,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:00:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:51,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:00:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:51,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:00:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:51,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 18:00:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:51,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:00:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:51,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:00:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:51,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:00:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:51,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 18:00:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:51,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 18:00:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:51,873 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 18:00:51,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269862468] [2020-08-21 18:00:51,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:00:51,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 18:00:51,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146306626] [2020-08-21 18:00:51,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 18:00:51,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:00:51,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 18:00:51,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:00:51,875 INFO L87 Difference]: Start difference. First operand 169 states and 193 transitions. Second operand 12 states. [2020-08-21 18:00:52,369 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:00:52,668 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:00:52,914 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:00:53,197 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:00:53,697 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:00:54,489 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:00:54,775 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:00:55,024 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:00:55,244 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:00:55,500 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:00:55,763 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:00:56,657 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:00:56,954 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:00:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:00:57,552 INFO L93 Difference]: Finished difference Result 604 states and 790 transitions. [2020-08-21 18:00:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 18:00:57,553 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-21 18:00:57,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:00:57,559 INFO L225 Difference]: With dead ends: 604 [2020-08-21 18:00:57,559 INFO L226 Difference]: Without dead ends: 459 [2020-08-21 18:00:57,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-21 18:00:57,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-08-21 18:00:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 397. [2020-08-21 18:00:57,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-08-21 18:00:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 467 transitions. [2020-08-21 18:00:57,661 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 467 transitions. Word has length 74 [2020-08-21 18:00:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:00:57,662 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 467 transitions. [2020-08-21 18:00:57,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 18:00:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 467 transitions. [2020-08-21 18:00:57,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-21 18:00:57,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:00:57,666 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, 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] [2020-08-21 18:00:57,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:00:57,666 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:00:57,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:00:57,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2117624429, now seen corresponding path program 1 times [2020-08-21 18:00:57,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:00:57,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066804981] [2020-08-21 18:00:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:00:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,013 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:00:58,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:00:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:00:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:00:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:00:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:00:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:00:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:00:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:00:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:00:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:00:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:00:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 18:00:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:00:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 18:00:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 18:00:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 18:00:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:00:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 18:00:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-21 18:00:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:00:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 18:00:58,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066804981] [2020-08-21 18:00:58,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:00:58,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 18:00:58,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177378943] [2020-08-21 18:00:58,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 18:00:58,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:00:58,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 18:00:58,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:00:58,223 INFO L87 Difference]: Start difference. First operand 397 states and 467 transitions. Second operand 13 states. [2020-08-21 18:00:59,082 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:00:59,671 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:00,231 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:00,484 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-21 18:01:00,756 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:01,006 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:01,233 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:01,479 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-21 18:01:01,790 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:02,074 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:03,429 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:03,685 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 18:01:03,915 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:04,152 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:01:04,609 INFO L93 Difference]: Finished difference Result 831 states and 1058 transitions. [2020-08-21 18:01:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 18:01:04,609 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 119 [2020-08-21 18:01:04,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:01:04,618 INFO L225 Difference]: With dead ends: 831 [2020-08-21 18:01:04,620 INFO L226 Difference]: Without dead ends: 458 [2020-08-21 18:01:04,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 18:01:04,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-21 18:01:04,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 391. [2020-08-21 18:01:04,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-08-21 18:01:04,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 461 transitions. [2020-08-21 18:01:04,733 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 461 transitions. Word has length 119 [2020-08-21 18:01:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:01:04,733 INFO L479 AbstractCegarLoop]: Abstraction has 391 states and 461 transitions. [2020-08-21 18:01:04,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 18:01:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 461 transitions. [2020-08-21 18:01:04,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-08-21 18:01:04,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:01:04,736 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] [2020-08-21 18:01:04,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:01:04,736 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:01:04,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:01:04,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1622369259, now seen corresponding path program 1 times [2020-08-21 18:01:04,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:01:04,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137560582] [2020-08-21 18:01:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:01:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:04,985 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:01:04,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:01:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:01:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:01:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:01:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 18:01:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:01:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 18:01:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-21 18:01:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 18:01:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 18:01:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-21 18:01:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:05,153 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 18:01:05,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137560582] [2020-08-21 18:01:05,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:01:05,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 18:01:05,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645703884] [2020-08-21 18:01:05,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 18:01:05,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:01:05,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 18:01:05,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:01:05,156 INFO L87 Difference]: Start difference. First operand 391 states and 461 transitions. Second operand 12 states. [2020-08-21 18:01:05,949 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:06,178 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:06,397 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:06,942 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:07,169 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:07,384 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:01:08,084 INFO L93 Difference]: Finished difference Result 709 states and 866 transitions. [2020-08-21 18:01:08,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 18:01:08,085 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2020-08-21 18:01:08,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:01:08,088 INFO L225 Difference]: With dead ends: 709 [2020-08-21 18:01:08,088 INFO L226 Difference]: Without dead ends: 342 [2020-08-21 18:01:08,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 18:01:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-08-21 18:01:08,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 316. [2020-08-21 18:01:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-08-21 18:01:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 370 transitions. [2020-08-21 18:01:08,152 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 370 transitions. Word has length 111 [2020-08-21 18:01:08,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:01:08,153 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 370 transitions. [2020-08-21 18:01:08,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 18:01:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 370 transitions. [2020-08-21 18:01:08,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 18:01:08,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:01:08,155 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] [2020-08-21 18:01:08,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:01:08,155 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:01:08,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:01:08,156 INFO L82 PathProgramCache]: Analyzing trace with hash 782485200, now seen corresponding path program 1 times [2020-08-21 18:01:08,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:01:08,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956999584] [2020-08-21 18:01:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:01:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,442 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:01:08,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:01:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:01:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:01:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:01:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:01:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:01:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:01:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 18:01:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 18:01:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 18:01:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 18:01:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 18:01:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 18:01:08,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956999584] [2020-08-21 18:01:08,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:01:08,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 18:01:08,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089608754] [2020-08-21 18:01:08,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 18:01:08,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:01:08,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 18:01:08,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:01:08,625 INFO L87 Difference]: Start difference. First operand 316 states and 370 transitions. Second operand 12 states. [2020-08-21 18:01:09,073 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 18:01:09,875 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:10,387 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 18:01:10,645 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:10,885 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:11,133 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:11,403 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:11,666 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:12,728 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:12,986 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:13,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:01:13,518 INFO L93 Difference]: Finished difference Result 739 states and 931 transitions. [2020-08-21 18:01:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 18:01:13,518 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 115 [2020-08-21 18:01:13,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:01:13,522 INFO L225 Difference]: With dead ends: 739 [2020-08-21 18:01:13,522 INFO L226 Difference]: Without dead ends: 505 [2020-08-21 18:01:13,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2020-08-21 18:01:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-08-21 18:01:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 421. [2020-08-21 18:01:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-08-21 18:01:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 500 transitions. [2020-08-21 18:01:13,608 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 500 transitions. Word has length 115 [2020-08-21 18:01:13,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:01:13,609 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 500 transitions. [2020-08-21 18:01:13,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 18:01:13,609 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 500 transitions. [2020-08-21 18:01:13,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-08-21 18:01:13,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:01:13,612 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, 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] [2020-08-21 18:01:13,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:01:13,613 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:01:13,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:01:13,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1084902701, now seen corresponding path program 2 times [2020-08-21 18:01:13,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:01:13,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381740578] [2020-08-21 18:01:13,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:01:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:13,921 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 18:01:13,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:01:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:13,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:01:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:13,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:01:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:13,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:01:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:13,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 18:01:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:13,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:01:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:13,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:01:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:01:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 18:01:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-21 18:01:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:01:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-21 18:01:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:01:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-21 18:01:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-21 18:01:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-21 18:01:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:01:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-21 18:01:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-21 18:01:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:01:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-21 18:01:14,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381740578] [2020-08-21 18:01:14,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:01:14,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 18:01:14,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021450377] [2020-08-21 18:01:14,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 18:01:14,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:01:14,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 18:01:14,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-08-21 18:01:14,294 INFO L87 Difference]: Start difference. First operand 421 states and 500 transitions. Second operand 14 states. [2020-08-21 18:01:14,858 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:15,465 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:16,289 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:16,571 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:16,832 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:17,092 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:17,358 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:17,616 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 18:01:18,529 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 18:01:18,786 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 18:01:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:01:19,752 INFO L93 Difference]: Finished difference Result 1024 states and 1341 transitions. [2020-08-21 18:01:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 18:01:19,753 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 155 [2020-08-21 18:01:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:01:19,759 INFO L225 Difference]: With dead ends: 1024 [2020-08-21 18:01:19,759 INFO L226 Difference]: Without dead ends: 685 [2020-08-21 18:01:19,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 18:01:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2020-08-21 18:01:19,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 422. [2020-08-21 18:01:19,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-08-21 18:01:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 502 transitions. [2020-08-21 18:01:19,881 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 502 transitions. Word has length 155 [2020-08-21 18:01:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:01:19,882 INFO L479 AbstractCegarLoop]: Abstraction has 422 states and 502 transitions. [2020-08-21 18:01:19,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 18:01:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 502 transitions. [2020-08-21 18:01:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 18:01:19,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:01:19,885 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, 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] [2020-08-21 18:01:19,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:01:19,885 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:01:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:01:19,886 INFO L82 PathProgramCache]: Analyzing trace with hash 218697075, now seen corresponding path program 3 times [2020-08-21 18:01:19,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:01:19,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490893448] [2020-08-21 18:01:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:01:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:01:19,966 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:01:19,967 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:01:19,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:01:20,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:01:20 BoogieIcfgContainer [2020-08-21 18:01:20,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:01:20,027 INFO L168 Benchmark]: Toolchain (without parser) took 39061.62 ms. Allocated memory was 138.9 MB in the beginning and 666.9 MB in the end (delta: 528.0 MB). Free memory was 101.6 MB in the beginning and 446.9 MB in the end (delta: -345.3 MB). Peak memory consumption was 182.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:01:20,029 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 18:01:20,031 INFO L168 Benchmark]: CACSL2BoogieTranslator took 685.38 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.4 MB in the beginning and 170.3 MB in the end (delta: -68.9 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-08-21 18:01:20,035 INFO L168 Benchmark]: Boogie Preprocessor took 89.12 ms. Allocated memory is still 201.9 MB. Free memory was 170.3 MB in the beginning and 166.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:01:20,036 INFO L168 Benchmark]: RCFGBuilder took 1165.96 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 166.1 MB in the beginning and 199.2 MB in the end (delta: -33.1 MB). Peak memory consumption was 84.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:01:20,038 INFO L168 Benchmark]: TraceAbstraction took 37116.51 ms. Allocated memory was 234.4 MB in the beginning and 666.9 MB in the end (delta: 432.5 MB). Free memory was 199.2 MB in the beginning and 446.9 MB in the end (delta: -247.7 MB). Peak memory consumption was 184.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:01:20,047 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 685.38 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.4 MB in the beginning and 170.3 MB in the end (delta: -68.9 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 89.12 ms. Allocated memory is still 201.9 MB. Free memory was 170.3 MB in the beginning and 166.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1165.96 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 166.1 MB in the beginning and 199.2 MB in the end (delta: -33.1 MB). Peak memory consumption was 84.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 37116.51 ms. Allocated memory was 234.4 MB in the beginning and 666.9 MB in the end (delta: 432.5 MB). Free memory was 199.2 MB in the beginning and 446.9 MB in the end (delta: -247.7 MB). Peak memory consumption was 184.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 540]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L69] int cleanupTimeShifts = 4; [L282] int pumpRunning = 0; [L283] int systemActive = 1; [L442] int waterLevel = 1; [L443] int methaneLevelCritical = 0; [L714] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L150] int retValue_acc ; [L151] int tmp ; [L155] FCALL select_helpers() [L156] FCALL select_features() [L157] CALL, EXPR valid_product() [L199] int retValue_acc ; [L202] retValue_acc = 1 [L203] return (retValue_acc); [L157] RET, EXPR valid_product() [L157] tmp = valid_product() [L159] COND TRUE \read(tmp) [L161] FCALL setup() [L162] CALL runTest() [L141] CALL test() [L210] int splverifierCounter ; [L211] int tmp ; [L212] int tmp___0 ; [L213] int tmp___1 ; [L214] int tmp___2 ; [L217] splverifierCounter = 0 [L219] COND TRUE 1 [L221] COND TRUE splverifierCounter < 4 [L227] tmp = __VERIFIER_nondet_int() [L229] COND TRUE \read(tmp) [L231] CALL waterRise() [L460] COND TRUE waterLevel < 2 [L461] waterLevel = waterLevel + 1 [L231] RET waterRise() [L237] tmp___0 = __VERIFIER_nondet_int() [L239] COND FALSE !(\read(tmp___0)) [L247] tmp___2 = __VERIFIER_nondet_int() [L249] COND FALSE !(\read(tmp___2)) [L255] tmp___1 = __VERIFIER_nondet_int() [L257] COND TRUE \read(tmp___1) [L264] CALL timeShift() [L289] COND FALSE !(\read(pumpRunning)) [L296] COND TRUE \read(systemActive) [L298] CALL processEnvironment() [L318] int tmp ; [L321] COND TRUE ! pumpRunning [L323] CALL, EXPR isHighWaterLevel() [L415] int retValue_acc ; [L416] int tmp ; [L417] int tmp___0 ; [L421] CALL, EXPR isHighWaterSensorDry() [L522] int retValue_acc ; [L525] COND FALSE !(waterLevel < 2) [L529] retValue_acc = 0 [L530] return (retValue_acc); [L421] RET, EXPR isHighWaterSensorDry() [L421] tmp = isHighWaterSensorDry() [L423] COND FALSE !(\read(tmp)) [L426] tmp___0 = 1 [L428] retValue_acc = tmp___0 [L429] return (retValue_acc); [L323] RET, EXPR isHighWaterLevel() [L323] tmp = isHighWaterLevel() [L325] COND TRUE \read(tmp) [L327] CALL activatePump() [L346] pumpRunning = 1 [L327] RET activatePump() [L298] RET processEnvironment() [L304] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L513] int retValue_acc ; [L516] retValue_acc = waterLevel [L517] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND FALSE !(tmp == 0) [L304] RET __utac_acc__Specification4_spec__1() [L264] RET timeShift() [L219] COND TRUE 1 [L221] COND TRUE splverifierCounter < 4 [L227] tmp = __VERIFIER_nondet_int() [L229] COND FALSE !(\read(tmp)) [L237] tmp___0 = __VERIFIER_nondet_int() [L239] COND FALSE !(\read(tmp___0)) [L247] tmp___2 = __VERIFIER_nondet_int() [L249] COND FALSE !(\read(tmp___2)) [L255] tmp___1 = __VERIFIER_nondet_int() [L257] COND TRUE \read(tmp___1) [L264] CALL timeShift() [L289] COND TRUE \read(pumpRunning) [L291] CALL lowerWaterLevel() [L448] COND TRUE waterLevel > 0 [L449] waterLevel = waterLevel - 1 [L291] RET lowerWaterLevel() [L296] COND TRUE \read(systemActive) [L298] CALL processEnvironment() [L318] int tmp ; [L321] COND FALSE !(! pumpRunning) [L336] FCALL processEnvironment__wrappee__base() [L298] RET processEnvironment() [L304] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L513] int retValue_acc ; [L516] retValue_acc = waterLevel [L517] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND FALSE !(tmp == 0) [L304] RET __utac_acc__Specification4_spec__1() [L264] RET timeShift() [L219] COND TRUE 1 [L221] COND TRUE splverifierCounter < 4 [L227] tmp = __VERIFIER_nondet_int() [L229] COND FALSE !(\read(tmp)) [L237] tmp___0 = __VERIFIER_nondet_int() [L239] COND FALSE !(\read(tmp___0)) [L247] tmp___2 = __VERIFIER_nondet_int() [L249] COND FALSE !(\read(tmp___2)) [L255] tmp___1 = __VERIFIER_nondet_int() [L257] COND TRUE \read(tmp___1) [L264] CALL timeShift() [L289] COND TRUE \read(pumpRunning) [L291] CALL lowerWaterLevel() [L448] COND TRUE waterLevel > 0 [L449] waterLevel = waterLevel - 1 [L291] RET lowerWaterLevel() [L296] COND TRUE \read(systemActive) [L298] CALL processEnvironment() [L318] int tmp ; [L321] COND FALSE !(! pumpRunning) [L336] FCALL processEnvironment__wrappee__base() [L298] RET processEnvironment() [L304] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L513] int retValue_acc ; [L516] retValue_acc = waterLevel [L517] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND TRUE tmp == 0 [L53] CALL, EXPR isPumpRunning() [L370] int retValue_acc ; [L373] retValue_acc = pumpRunning [L374] return (retValue_acc); [L53] RET, EXPR isPumpRunning() [L53] tmp___0 = isPumpRunning() [L55] COND TRUE \read(tmp___0) [L57] CALL __automaton_fail() [L540] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 38 procedures, 219 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 37.0s, OverallIterations: 10, TraceHistogramMax: 3, AutomataDifference: 31.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 970 SDtfs, 2437 SDslu, 1384 SDs, 0 SdLazy, 6710 SolverSat, 1763 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 439 GetRequests, 275 SyntacticMatches, 10 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 16.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=422occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 9 MinimizatonAttempts, 624 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 930 NumberOfCodeBlocks, 930 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 770 ConstructedInterpolants, 0 QuantifiedInterpolants, 286969 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 141/169 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...