/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --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 [2020-08-22 05:20:07,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 05:20:07,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 05:20:07,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 05:20:07,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 05:20:07,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 05:20:07,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 05:20:07,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 05:20:07,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 05:20:07,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 05:20:07,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 05:20:07,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 05:20:07,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 05:20:07,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 05:20:07,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 05:20:07,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 05:20:07,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 05:20:07,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 05:20:07,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 05:20:07,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 05:20:07,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 05:20:07,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 05:20:07,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 05:20:07,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 05:20:07,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 05:20:07,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 05:20:07,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 05:20:07,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 05:20:07,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 05:20:07,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 05:20:07,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 05:20:07,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 05:20:07,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 05:20:07,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 05:20:07,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 05:20:07,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 05:20:07,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 05:20:07,690 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 05:20:07,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 05:20:07,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 05:20:07,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 05:20:07,692 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 [2020-08-22 05:20:07,714 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 05:20:07,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 05:20:07,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 05:20:07,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 05:20:07,716 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 05:20:07,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 05:20:07,717 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 05:20:07,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 05:20:07,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 05:20:07,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 05:20:07,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 05:20:07,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 05:20:07,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 05:20:07,718 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 05:20:07,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 05:20:07,718 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 05:20:07,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 05:20:07,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 05:20:07,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 05:20:07,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 05:20:07,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 05:20:07,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:20:07,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 05:20:07,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 05:20:07,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 05:20:07,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 05:20:07,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 05:20:07,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 05:20:07,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 05:20:07,721 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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-08-22 05:20:08,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 05:20:08,066 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 05:20:08,069 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 05:20:08,071 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 05:20:08,071 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 05:20:08,072 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product34.cil.c [2020-08-22 05:20:08,143 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a29678ffb/d2fbe0c59b3644cf98e45854d1a9e68d/FLAGd9d8f465d [2020-08-22 05:20:08,694 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 05:20:08,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product34.cil.c [2020-08-22 05:20:08,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a29678ffb/d2fbe0c59b3644cf98e45854d1a9e68d/FLAGd9d8f465d [2020-08-22 05:20:08,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a29678ffb/d2fbe0c59b3644cf98e45854d1a9e68d [2020-08-22 05:20:08,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 05:20:08,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 05:20:08,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 05:20:08,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 05:20:08,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 05:20:08,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:20:08" (1/1) ... [2020-08-22 05:20:09,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27030054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:20:09, skipping insertion in model container [2020-08-22 05:20:09,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:20:08" (1/1) ... [2020-08-22 05:20:09,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 05:20:09,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 05:20:09,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:20:09,407 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 05:20:09,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:20:09,697 INFO L208 MainTranslator]: Completed translation [2020-08-22 05:20:09,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:20:09 WrapperNode [2020-08-22 05:20:09,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 05:20:09,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 05:20:09,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 05:20:09,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 05:20:09,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:20:09" (1/1) ... [2020-08-22 05:20:09,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:20:09" (1/1) ... [2020-08-22 05:20:09,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:20:09" (1/1) ... [2020-08-22 05:20:09,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:20:09" (1/1) ... [2020-08-22 05:20:09,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:20:09" (1/1) ... [2020-08-22 05:20:09,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:20:09" (1/1) ... [2020-08-22 05:20:09,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:20:09" (1/1) ... [2020-08-22 05:20:09,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 05:20:09,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 05:20:09,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 05:20:09,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 05:20:09,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:20:09" (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 [2020-08-22 05:20:09,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 05:20:09,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 05:20:09,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-22 05:20:09,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-22 05:20:09,857 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-22 05:20:09,858 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-22 05:20:09,858 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-22 05:20:09,858 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-22 05:20:09,858 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 05:20:09,858 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-22 05:20:09,859 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-22 05:20:09,859 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-22 05:20:09,859 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-22 05:20:09,859 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-22 05:20:09,859 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-22 05:20:09,859 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-22 05:20:09,860 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-22 05:20:09,860 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-22 05:20:09,860 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-22 05:20:09,860 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-22 05:20:09,860 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-22 05:20:09,860 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-22 05:20:09,860 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-22 05:20:09,861 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-22 05:20:09,861 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-22 05:20:09,861 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-22 05:20:09,861 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-22 05:20:09,861 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-22 05:20:09,861 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-22 05:20:09,862 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-22 05:20:09,862 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-22 05:20:09,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-22 05:20:09,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-22 05:20:09,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-22 05:20:09,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-22 05:20:09,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-22 05:20:09,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-22 05:20:09,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-22 05:20:09,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 05:20:09,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 05:20:09,863 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-22 05:20:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-22 05:20:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-22 05:20:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-22 05:20:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-22 05:20:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-22 05:20:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-22 05:20:09,865 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-22 05:20:09,865 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-22 05:20:09,865 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-22 05:20:09,865 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-22 05:20:09,865 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-22 05:20:09,865 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-22 05:20:09,866 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-22 05:20:09,866 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-22 05:20:09,866 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-22 05:20:09,866 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-22 05:20:09,866 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 05:20:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-22 05:20:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-22 05:20:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-22 05:20:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-22 05:20:09,869 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-22 05:20:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-22 05:20:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-22 05:20:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-22 05:20:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-22 05:20:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-22 05:20:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-22 05:20:09,870 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-22 05:20:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 05:20:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-22 05:20:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 05:20:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 05:20:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-22 05:20:09,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 05:20:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 05:20:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 05:20:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 05:20:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-22 05:20:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 05:20:09,872 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-22 05:20:09,873 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-22 05:20:09,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 05:20:09,873 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-22 05:20:09,873 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-22 05:20:09,873 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-22 05:20:09,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 05:20:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-22 05:20:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 05:20:11,031 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 05:20:11,032 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-22 05:20:11,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:20:11 BoogieIcfgContainer [2020-08-22 05:20:11,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 05:20:11,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 05:20:11,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 05:20:11,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 05:20:11,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:20:08" (1/3) ... [2020-08-22 05:20:11,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f773af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:20:11, skipping insertion in model container [2020-08-22 05:20:11,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:20:09" (2/3) ... [2020-08-22 05:20:11,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f773af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:20:11, skipping insertion in model container [2020-08-22 05:20:11,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:20:11" (3/3) ... [2020-08-22 05:20:11,046 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product34.cil.c [2020-08-22 05:20:11,056 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 05:20:11,067 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 05:20:11,081 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 05:20:11,104 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 05:20:11,104 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 05:20:11,105 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 05:20:11,105 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 05:20:11,105 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 05:20:11,105 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 05:20:11,105 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 05:20:11,105 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 05:20:11,124 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-08-22 05:20:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 05:20:11,136 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:20:11,138 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] [2020-08-22 05:20:11,138 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:20:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:20:11,144 INFO L82 PathProgramCache]: Analyzing trace with hash -368094870, now seen corresponding path program 1 times [2020-08-22 05:20:11,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:20:11,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181646983] [2020-08-22 05:20:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:20:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:11,780 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 05:20:11,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:20:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:11,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:20:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:11,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:20:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:11,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:20:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:11,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 05:20:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:11,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 05:20:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:11,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 05:20:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:20:11,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181646983] [2020-08-22 05:20:11,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:20:11,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:20:11,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837709694] [2020-08-22 05:20:11,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:20:11,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:20:11,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:20:11,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:20:11,928 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 3 states. [2020-08-22 05:20:12,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:20:12,958 INFO L93 Difference]: Finished difference Result 258 states and 341 transitions. [2020-08-22 05:20:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:20:12,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-22 05:20:12,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:20:12,975 INFO L225 Difference]: With dead ends: 258 [2020-08-22 05:20:12,975 INFO L226 Difference]: Without dead ends: 140 [2020-08-22 05:20:12,979 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 [2020-08-22 05:20:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-22 05:20:13,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2020-08-22 05:20:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-22 05:20:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2020-08-22 05:20:13,073 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 46 [2020-08-22 05:20:13,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:20:13,073 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2020-08-22 05:20:13,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:20:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2020-08-22 05:20:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 05:20:13,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:20:13,077 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] [2020-08-22 05:20:13,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 05:20:13,078 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:20:13,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:20:13,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1630578526, now seen corresponding path program 1 times [2020-08-22 05:20:13,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:20:13,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552878691] [2020-08-22 05:20:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:20:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:13,424 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 05:20:13,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:20:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:13,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:20:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:13,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:20:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:13,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:20:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:13,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 05:20:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:13,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 05:20:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:13,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 05:20:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:20:13,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552878691] [2020-08-22 05:20:13,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:20:13,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 05:20:13,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272106018] [2020-08-22 05:20:13,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 05:20:13,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:20:13,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 05:20:13,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 05:20:13,477 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand 4 states. [2020-08-22 05:20:13,956 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 05:20:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:20:14,680 INFO L93 Difference]: Finished difference Result 187 states and 228 transitions. [2020-08-22 05:20:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 05:20:14,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-22 05:20:14,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:20:14,683 INFO L225 Difference]: With dead ends: 187 [2020-08-22 05:20:14,684 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 05:20:14,685 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 [2020-08-22 05:20:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 05:20:14,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2020-08-22 05:20:14,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-22 05:20:14,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2020-08-22 05:20:14,718 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 47 [2020-08-22 05:20:14,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:20:14,718 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2020-08-22 05:20:14,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 05:20:14,719 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2020-08-22 05:20:14,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 05:20:14,721 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:20:14,721 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] [2020-08-22 05:20:14,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 05:20:14,721 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:20:14,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:20:14,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1910957979, now seen corresponding path program 1 times [2020-08-22 05:20:14,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:20:14,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154433629] [2020-08-22 05:20:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:20:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:15,049 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 05:20:15,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:20:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:15,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:20:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:15,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:20:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:15,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:20:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:15,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 05:20:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:15,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 05:20:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:15,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 05:20:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:20:15,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154433629] [2020-08-22 05:20:15,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:20:15,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 05:20:15,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375904016] [2020-08-22 05:20:15,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 05:20:15,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:20:15,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 05:20:15,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:20:15,141 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand 8 states. [2020-08-22 05:20:15,571 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:20:15,900 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:20:16,156 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:20:16,411 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:20:17,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:20:17,389 INFO L93 Difference]: Finished difference Result 200 states and 246 transitions. [2020-08-22 05:20:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 05:20:17,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-22 05:20:17,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:20:17,393 INFO L225 Difference]: With dead ends: 200 [2020-08-22 05:20:17,394 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 05:20:17,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-22 05:20:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 05:20:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2020-08-22 05:20:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-22 05:20:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-08-22 05:20:17,427 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 52 [2020-08-22 05:20:17,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:20:17,428 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-08-22 05:20:17,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 05:20:17,428 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-08-22 05:20:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 05:20:17,429 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:20:17,430 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] [2020-08-22 05:20:17,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 05:20:17,430 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:20:17,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:20:17,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2015382800, now seen corresponding path program 1 times [2020-08-22 05:20:17,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:20:17,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844643863] [2020-08-22 05:20:17,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:20:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:17,728 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 05:20:17,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:20:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:17,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:20:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:17,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:20:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:17,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:20:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:17,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 05:20:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:17,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 05:20:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:17,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:17,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 05:20:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:17,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 05:20:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:20:17,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844643863] [2020-08-22 05:20:17,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:20:17,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 05:20:17,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084177787] [2020-08-22 05:20:17,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:20:17,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:20:17,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:20:17,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:20:17,832 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 6 states. [2020-08-22 05:20:18,151 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:20:19,292 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 05:20:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:20:19,745 INFO L93 Difference]: Finished difference Result 288 states and 356 transitions. [2020-08-22 05:20:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 05:20:19,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-08-22 05:20:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:20:19,750 INFO L225 Difference]: With dead ends: 288 [2020-08-22 05:20:19,751 INFO L226 Difference]: Without dead ends: 212 [2020-08-22 05:20:19,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:20:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-08-22 05:20:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 169. [2020-08-22 05:20:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-08-22 05:20:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 193 transitions. [2020-08-22 05:20:19,795 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 193 transitions. Word has length 60 [2020-08-22 05:20:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:20:19,796 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 193 transitions. [2020-08-22 05:20:19,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:20:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 193 transitions. [2020-08-22 05:20:19,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 05:20:19,798 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:20:19,798 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] [2020-08-22 05:20:19,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 05:20:19,799 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:20:19,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:20:19,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2082850905, now seen corresponding path program 1 times [2020-08-22 05:20:19,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:20:19,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768852104] [2020-08-22 05:20:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:20:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:20,132 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 05:20:20,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:20:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:20,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:20:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:20,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:20:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:20,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:20:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:20,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 05:20:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:20,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 05:20:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:20,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:20,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:20:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:20,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 05:20:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:20,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 05:20:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:20,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 05:20:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:20:20,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768852104] [2020-08-22 05:20:20,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:20:20,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 05:20:20,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965003725] [2020-08-22 05:20:20,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 05:20:20,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:20:20,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 05:20:20,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-22 05:20:20,298 INFO L87 Difference]: Start difference. First operand 169 states and 193 transitions. Second operand 12 states. [2020-08-22 05:20:20,743 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:20:21,060 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:20:21,313 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:20:21,578 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:20:22,083 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 05:20:22,903 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:20:23,168 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 05:20:23,407 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 05:20:23,637 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 05:20:23,904 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 05:20:24,195 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 05:20:25,021 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:20:25,301 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:20:25,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:20:25,901 INFO L93 Difference]: Finished difference Result 604 states and 790 transitions. [2020-08-22 05:20:25,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 05:20:25,902 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-22 05:20:25,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:20:25,908 INFO L225 Difference]: With dead ends: 604 [2020-08-22 05:20:25,908 INFO L226 Difference]: Without dead ends: 459 [2020-08-22 05:20:25,910 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 [2020-08-22 05:20:25,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-08-22 05:20:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 397. [2020-08-22 05:20:25,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-08-22 05:20:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 467 transitions. [2020-08-22 05:20:25,999 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 467 transitions. Word has length 74 [2020-08-22 05:20:25,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:20:25,999 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 467 transitions. [2020-08-22 05:20:25,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 05:20:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 467 transitions. [2020-08-22 05:20:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-22 05:20:26,004 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:20:26,004 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] [2020-08-22 05:20:26,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 05:20:26,005 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:20:26,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:20:26,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2117624429, now seen corresponding path program 1 times [2020-08-22 05:20:26,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:20:26,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156911489] [2020-08-22 05:20:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:20:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,318 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 05:20:26,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:20:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:20:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:20:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:20:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 05:20:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 05:20:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 05:20:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:20:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 05:20:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 05:20:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:20:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 05:20:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 05:20:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 05:20:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-22 05:20:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-22 05:20:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 05:20:26,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156911489] [2020-08-22 05:20:26,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:20:26,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 05:20:26,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652515327] [2020-08-22 05:20:26,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 05:20:26,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:20:26,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 05:20:26,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 05:20:26,621 INFO L87 Difference]: Start difference. First operand 397 states and 467 transitions. Second operand 13 states. [2020-08-22 05:20:27,350 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:20:27,961 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:20:28,499 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 05:20:28,760 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-22 05:20:29,025 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 05:20:29,274 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 05:20:29,537 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 05:20:29,784 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-22 05:20:30,064 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 05:20:30,308 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 05:20:31,874 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:20:32,116 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 05:20:32,349 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 05:20:32,584 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 05:20:33,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:20:33,056 INFO L93 Difference]: Finished difference Result 831 states and 1058 transitions. [2020-08-22 05:20:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 05:20:33,057 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 119 [2020-08-22 05:20:33,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:20:33,062 INFO L225 Difference]: With dead ends: 831 [2020-08-22 05:20:33,062 INFO L226 Difference]: Without dead ends: 458 [2020-08-22 05:20:33,064 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 [2020-08-22 05:20:33,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-22 05:20:33,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 391. [2020-08-22 05:20:33,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-08-22 05:20:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 461 transitions. [2020-08-22 05:20:33,166 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 461 transitions. Word has length 119 [2020-08-22 05:20:33,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:20:33,166 INFO L479 AbstractCegarLoop]: Abstraction has 391 states and 461 transitions. [2020-08-22 05:20:33,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 05:20:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 461 transitions. [2020-08-22 05:20:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-08-22 05:20:33,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:20:33,170 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] [2020-08-22 05:20:33,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 05:20:33,171 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:20:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:20:33,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1622369259, now seen corresponding path program 1 times [2020-08-22 05:20:33,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:20:33,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054352500] [2020-08-22 05:20:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:20:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,438 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 05:20:33,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:20:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:20:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:20:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:20:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 05:20:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 05:20:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:20:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 05:20:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 05:20:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:20:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 05:20:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 05:20:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 05:20:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 05:20:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 05:20:33,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054352500] [2020-08-22 05:20:33,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:20:33,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 05:20:33,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366970949] [2020-08-22 05:20:33,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 05:20:33,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:20:33,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 05:20:33,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-22 05:20:33,598 INFO L87 Difference]: Start difference. First operand 391 states and 461 transitions. Second operand 12 states. [2020-08-22 05:20:34,435 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 05:20:34,707 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 05:20:34,937 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 05:20:35,511 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 05:20:35,749 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 05:20:35,961 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 05:20:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:20:36,632 INFO L93 Difference]: Finished difference Result 709 states and 866 transitions. [2020-08-22 05:20:36,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 05:20:36,633 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2020-08-22 05:20:36,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:20:36,636 INFO L225 Difference]: With dead ends: 709 [2020-08-22 05:20:36,636 INFO L226 Difference]: Without dead ends: 342 [2020-08-22 05:20:36,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-22 05:20:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-08-22 05:20:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 316. [2020-08-22 05:20:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-08-22 05:20:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 370 transitions. [2020-08-22 05:20:36,703 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 370 transitions. Word has length 111 [2020-08-22 05:20:36,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:20:36,704 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 370 transitions. [2020-08-22 05:20:36,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 05:20:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 370 transitions. [2020-08-22 05:20:36,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 05:20:36,706 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:20:36,706 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] [2020-08-22 05:20:36,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 05:20:36,707 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:20:36,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:20:36,707 INFO L82 PathProgramCache]: Analyzing trace with hash 782485200, now seen corresponding path program 1 times [2020-08-22 05:20:36,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:20:36,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263864854] [2020-08-22 05:20:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:20:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,035 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 05:20:37,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:20:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:20:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:20:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:20:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 05:20:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 05:20:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 05:20:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:20:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 05:20:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 05:20:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:20:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 05:20:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 05:20:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 05:20:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 05:20:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 05:20:37,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263864854] [2020-08-22 05:20:37,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:20:37,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 05:20:37,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259837114] [2020-08-22 05:20:37,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 05:20:37,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:20:37,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 05:20:37,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-22 05:20:37,219 INFO L87 Difference]: Start difference. First operand 316 states and 370 transitions. Second operand 12 states. [2020-08-22 05:20:38,123 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 05:20:38,963 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:20:39,445 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 05:20:39,710 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 05:20:39,962 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 05:20:40,190 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:20:40,438 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 05:20:40,698 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 05:20:41,693 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:20:41,966 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:20:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:20:42,479 INFO L93 Difference]: Finished difference Result 739 states and 931 transitions. [2020-08-22 05:20:42,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 05:20:42,479 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 115 [2020-08-22 05:20:42,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:20:42,483 INFO L225 Difference]: With dead ends: 739 [2020-08-22 05:20:42,483 INFO L226 Difference]: Without dead ends: 505 [2020-08-22 05:20:42,484 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 [2020-08-22 05:20:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-08-22 05:20:42,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 421. [2020-08-22 05:20:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-08-22 05:20:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 500 transitions. [2020-08-22 05:20:42,604 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 500 transitions. Word has length 115 [2020-08-22 05:20:42,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:20:42,604 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 500 transitions. [2020-08-22 05:20:42,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 05:20:42,605 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 500 transitions. [2020-08-22 05:20:42,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-08-22 05:20:42,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:20:42,611 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] [2020-08-22 05:20:42,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 05:20:42,611 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:20:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:20:42,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1084902701, now seen corresponding path program 2 times [2020-08-22 05:20:42,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:20:42,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302929066] [2020-08-22 05:20:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:20:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,030 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 05:20:43,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:20:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:20:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:20:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:20:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 05:20:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 05:20:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 05:20:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:20:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 05:20:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 05:20:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:20:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 05:20:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:20:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:20:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-22 05:20:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 05:20:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-22 05:20:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 05:20:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-22 05:20:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:20:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-22 05:20:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-22 05:20:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:20:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 05:20:43,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302929066] [2020-08-22 05:20:43,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:20:43,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 05:20:43,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652812482] [2020-08-22 05:20:43,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 05:20:43,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:20:43,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 05:20:43,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-08-22 05:20:43,374 INFO L87 Difference]: Start difference. First operand 421 states and 500 transitions. Second operand 14 states. [2020-08-22 05:20:44,269 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:20:45,026 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:20:45,818 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:20:46,084 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 05:20:46,314 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 05:20:46,540 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:20:46,791 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 05:20:47,058 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 05:20:47,965 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:20:48,229 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:20:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:20:49,145 INFO L93 Difference]: Finished difference Result 1024 states and 1341 transitions. [2020-08-22 05:20:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 05:20:49,146 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 155 [2020-08-22 05:20:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:20:49,152 INFO L225 Difference]: With dead ends: 1024 [2020-08-22 05:20:49,152 INFO L226 Difference]: Without dead ends: 685 [2020-08-22 05:20:49,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 05:20:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2020-08-22 05:20:49,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 422. [2020-08-22 05:20:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-08-22 05:20:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 502 transitions. [2020-08-22 05:20:49,287 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 502 transitions. Word has length 155 [2020-08-22 05:20:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:20:49,287 INFO L479 AbstractCegarLoop]: Abstraction has 422 states and 502 transitions. [2020-08-22 05:20:49,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 05:20:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 502 transitions. [2020-08-22 05:20:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-22 05:20:49,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:20:49,290 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] [2020-08-22 05:20:49,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 05:20:49,291 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:20:49,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:20:49,291 INFO L82 PathProgramCache]: Analyzing trace with hash 218697075, now seen corresponding path program 3 times [2020-08-22 05:20:49,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:20:49,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142121177] [2020-08-22 05:20:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:20:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 05:20:49,365 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 05:20:49,365 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 05:20:49,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 05:20:49,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 05:20:49 BoogieIcfgContainer [2020-08-22 05:20:49,416 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 05:20:49,425 INFO L168 Benchmark]: Toolchain (without parser) took 40425.00 ms. Allocated memory was 144.2 MB in the beginning and 638.6 MB in the end (delta: 494.4 MB). Free memory was 101.7 MB in the beginning and 542.1 MB in the end (delta: -440.4 MB). Peak memory consumption was 54.0 MB. Max. memory is 7.1 GB. [2020-08-22 05:20:49,427 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.2 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 05:20:49,430 INFO L168 Benchmark]: CACSL2BoogieTranslator took 704.04 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 101.4 MB in the beginning and 172.8 MB in the end (delta: -71.3 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-08-22 05:20:49,432 INFO L168 Benchmark]: Boogie Preprocessor took 95.66 ms. Allocated memory is still 202.4 MB. Free memory was 172.8 MB in the beginning and 168.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-08-22 05:20:49,433 INFO L168 Benchmark]: RCFGBuilder took 1242.85 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 168.5 MB in the beginning and 202.2 MB in the end (delta: -33.6 MB). Peak memory consumption was 87.2 MB. Max. memory is 7.1 GB. [2020-08-22 05:20:49,433 INFO L168 Benchmark]: TraceAbstraction took 38377.53 ms. Allocated memory was 234.4 MB in the beginning and 638.6 MB in the end (delta: 404.2 MB). Free memory was 200.7 MB in the beginning and 542.1 MB in the end (delta: -341.4 MB). Peak memory consumption was 62.9 MB. Max. memory is 7.1 GB. [2020-08-22 05:20:49,445 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.2 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 704.04 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 101.4 MB in the beginning and 172.8 MB in the end (delta: -71.3 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 95.66 ms. Allocated memory is still 202.4 MB. Free memory was 172.8 MB in the beginning and 168.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1242.85 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 168.5 MB in the beginning and 202.2 MB in the end (delta: -33.6 MB). Peak memory consumption was 87.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 38377.53 ms. Allocated memory was 234.4 MB in the beginning and 638.6 MB in the end (delta: 404.2 MB). Free memory was 200.7 MB in the beginning and 542.1 MB in the end (delta: -341.4 MB). Peak memory consumption was 62.9 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: 38.2s, OverallIterations: 10, TraceHistogramMax: 3, AutomataDifference: 32.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 972 SDtfs, 2437 SDslu, 1394 SDs, 0 SdLazy, 6712 SolverSat, 1762 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 439 GetRequests, 275 SyntacticMatches, 10 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 16.9s 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, 4.0s 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...