/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec3_product41.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:58:51,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:58:51,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:58:51,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:58:51,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:58:51,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:58:51,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:58:51,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:58:51,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:58:51,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:58:51,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:58:51,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:58:51,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:58:51,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:58:51,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:58:51,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:58:51,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:58:51,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:58:51,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:58:51,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:58:51,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:58:51,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:58:51,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:58:51,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:58:51,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:58:51,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:58:51,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:58:51,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:58:51,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:58:51,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:58:51,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:58:51,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:58:51,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:58:51,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:58:51,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:58:51,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:58:51,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:58:51,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:58:51,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:58:51,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:58:51,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:58:51,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 17:58:51,799 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:58:51,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:58:51,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:58:51,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:58:51,801 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:58:51,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:58:51,802 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:58:51,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:58:51,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:58:51,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:58:51,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:58:51,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:58:51,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:58:51,803 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:58:51,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:58:51,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:58:51,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:58:51,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:58:51,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:58:51,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:58:51,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:58:51,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:58:51,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:58:51,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:58:51,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:58:51,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:58:51,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:58:51,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:58:51,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:58:51,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 17:58:52,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:58:52,142 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:58:52,148 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:58:52,150 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:58:52,152 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:58:52,153 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product41.cil.c [2020-08-21 17:58:52,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49d122a8c/e3955b8c8c324462a779119ec3f871a9/FLAGe25705ba1 [2020-08-21 17:58:52,803 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:58:52,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product41.cil.c [2020-08-21 17:58:52,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49d122a8c/e3955b8c8c324462a779119ec3f871a9/FLAGe25705ba1 [2020-08-21 17:58:53,051 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49d122a8c/e3955b8c8c324462a779119ec3f871a9 [2020-08-21 17:58:53,059 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:58:53,061 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:58:53,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:58:53,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:58:53,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:58:53,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:58:53" (1/1) ... [2020-08-21 17:58:53,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be095dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:58:53, skipping insertion in model container [2020-08-21 17:58:53,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:58:53" (1/1) ... [2020-08-21 17:58:53,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:58:53,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:58:53,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:58:53,634 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:58:53,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:58:53,770 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:58:53,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:58:53 WrapperNode [2020-08-21 17:58:53,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:58:53,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:58:53,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:58:53,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:58:53,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:58:53" (1/1) ... [2020-08-21 17:58:53,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:58:53" (1/1) ... [2020-08-21 17:58:53,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:58:53" (1/1) ... [2020-08-21 17:58:53,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:58:53" (1/1) ... [2020-08-21 17:58:53,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:58:53" (1/1) ... [2020-08-21 17:58:53,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:58:53" (1/1) ... [2020-08-21 17:58:53,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:58:53" (1/1) ... [2020-08-21 17:58:53,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:58:53,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:58:53,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:58:53,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:58:53,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:58:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:58:53,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:58:53,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:58:53,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 17:58:53,954 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 17:58:53,954 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 17:58:53,955 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 17:58:53,955 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 17:58:53,956 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 17:58:53,956 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 17:58:53,957 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 17:58:53,957 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2020-08-21 17:58:53,957 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 17:58:53,957 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 17:58:53,957 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 17:58:53,957 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 17:58:53,958 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 17:58:53,958 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 17:58:53,959 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 17:58:53,959 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-21 17:58:53,959 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 17:58:53,959 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 17:58:53,959 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 17:58:53,959 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 17:58:53,960 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 17:58:53,960 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 17:58:53,960 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 17:58:53,961 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 17:58:53,961 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 17:58:53,961 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 17:58:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 17:58:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:58:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 17:58:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 17:58:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 17:58:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 17:58:53,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 17:58:53,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 17:58:53,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 17:58:53,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:58:53,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:58:53,963 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 17:58:53,963 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 17:58:53,964 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 17:58:53,964 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 17:58:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 17:58:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 17:58:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 17:58:53,965 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 17:58:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 17:58:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 17:58:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 17:58:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 17:58:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 17:58:53,966 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 17:58:53,967 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-21 17:58:53,967 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 17:58:53,967 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 17:58:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 17:58:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2020-08-21 17:58:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 17:58:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 17:58:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 17:58:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 17:58:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 17:58:53,969 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 17:58:53,969 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 17:58:53,969 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 17:58:53,969 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 17:58:53,969 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 17:58:53,969 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 17:58:53,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:58:53,970 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 17:58:53,970 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 17:58:53,971 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 17:58:53,971 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 17:58:53,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 17:58:53,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 17:58:53,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 17:58:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 17:58:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 17:58:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 17:58:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 17:58:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 17:58:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 17:58:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 17:58:53,974 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 17:58:53,974 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 17:58:53,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:58:53,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 17:58:53,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:58:55,076 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:58:55,076 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 17:58:55,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:58:55 BoogieIcfgContainer [2020-08-21 17:58:55,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:58:55,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:58:55,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:58:55,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:58:55,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:58:53" (1/3) ... [2020-08-21 17:58:55,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbe4147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:58:55, skipping insertion in model container [2020-08-21 17:58:55,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:58:53" (2/3) ... [2020-08-21 17:58:55,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbe4147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:58:55, skipping insertion in model container [2020-08-21 17:58:55,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:58:55" (3/3) ... [2020-08-21 17:58:55,091 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product41.cil.c [2020-08-21 17:58:55,102 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:58:55,110 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:58:55,125 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:58:55,150 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:58:55,151 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:58:55,151 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:58:55,151 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:58:55,152 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:58:55,152 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:58:55,152 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:58:55,152 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:58:55,175 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states. [2020-08-21 17:58:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 17:58:55,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:58:55,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:58:55,186 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:58:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:58:55,193 INFO L82 PathProgramCache]: Analyzing trace with hash 177325019, now seen corresponding path program 1 times [2020-08-21 17:58:55,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:58:55,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690324489] [2020-08-21 17:58:55,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:58:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:55,930 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:58:55,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:58:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:56,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:58:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:56,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:58:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:56,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:58:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:56,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:58:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:56,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:58:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:56,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 17:58:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:56,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 17:58:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:58:56,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690324489] [2020-08-21 17:58:56,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:58:56,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:58:56,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119337962] [2020-08-21 17:58:56,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:58:56,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:58:56,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:58:56,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:58:56,130 INFO L87 Difference]: Start difference. First operand 166 states. Second operand 3 states. [2020-08-21 17:58:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:58:57,247 INFO L93 Difference]: Finished difference Result 287 states and 375 transitions. [2020-08-21 17:58:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:58:57,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-21 17:58:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:58:57,268 INFO L225 Difference]: With dead ends: 287 [2020-08-21 17:58:57,268 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 17:58:57,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:58:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 17:58:57,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 123. [2020-08-21 17:58:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-21 17:58:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2020-08-21 17:58:57,366 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 52 [2020-08-21 17:58:57,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:58:57,366 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2020-08-21 17:58:57,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:58:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2020-08-21 17:58:57,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 17:58:57,370 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:58:57,370 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] [2020-08-21 17:58:57,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:58:57,371 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:58:57,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:58:57,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1842882407, now seen corresponding path program 1 times [2020-08-21 17:58:57,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:58:57,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915497830] [2020-08-21 17:58:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:58:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:57,723 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:58:57,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:58:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:57,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:58:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:57,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:58:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:57,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:58:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:57,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:58:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:57,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:58:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:57,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:58:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:57,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 17:58:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:58:57,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915497830] [2020-08-21 17:58:57,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:58:57,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:58:57,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599990985] [2020-08-21 17:58:57,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:58:57,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:58:57,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:58:57,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:58:57,771 INFO L87 Difference]: Start difference. First operand 123 states and 144 transitions. Second operand 4 states. [2020-08-21 17:58:58,304 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:58:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:58:59,106 INFO L93 Difference]: Finished difference Result 220 states and 266 transitions. [2020-08-21 17:58:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:58:59,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-21 17:58:59,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:58:59,111 INFO L225 Difference]: With dead ends: 220 [2020-08-21 17:58:59,111 INFO L226 Difference]: Without dead ends: 139 [2020-08-21 17:58:59,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:58:59,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-21 17:58:59,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 114. [2020-08-21 17:58:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 17:58:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2020-08-21 17:58:59,148 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 53 [2020-08-21 17:58:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:58:59,148 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2020-08-21 17:58:59,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:58:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2020-08-21 17:58:59,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:58:59,150 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:58:59,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:58:59,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:58:59,151 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:58:59,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:58:59,151 INFO L82 PathProgramCache]: Analyzing trace with hash 774651483, now seen corresponding path program 1 times [2020-08-21 17:58:59,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:58:59,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227034517] [2020-08-21 17:58:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:58:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:59,464 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:58:59,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:58:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:59,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:58:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:59,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:58:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:59,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:58:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:59,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:58:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:59,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:58:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:59,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:58:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:59,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 17:58:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:58:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:58:59,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227034517] [2020-08-21 17:58:59,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:58:59,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:58:59,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442050803] [2020-08-21 17:58:59,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:58:59,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:58:59,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:58:59,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:58:59,648 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand 8 states. [2020-08-21 17:59:00,030 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:59:00,307 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:59:00,589 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:59:00,826 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:59:01,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:59:01,867 INFO L93 Difference]: Finished difference Result 229 states and 280 transitions. [2020-08-21 17:59:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 17:59:01,869 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-21 17:59:01,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:59:01,872 INFO L225 Difference]: With dead ends: 229 [2020-08-21 17:59:01,872 INFO L226 Difference]: Without dead ends: 139 [2020-08-21 17:59:01,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:59:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-21 17:59:01,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 114. [2020-08-21 17:59:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 17:59:01,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2020-08-21 17:59:01,905 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 57 [2020-08-21 17:59:01,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:59:01,905 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2020-08-21 17:59:01,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:59:01,906 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2020-08-21 17:59:01,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 17:59:01,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:59:01,907 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] [2020-08-21 17:59:01,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:59:01,908 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:59:01,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:59:01,908 INFO L82 PathProgramCache]: Analyzing trace with hash -771193848, now seen corresponding path program 1 times [2020-08-21 17:59:01,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:59:01,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716726342] [2020-08-21 17:59:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:59:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:02,175 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:59:02,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:59:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:02,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:59:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:02,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:59:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:02,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:59:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:02,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:59:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:02,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 17:59:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:02,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:59:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:02,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 17:59:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:02,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 17:59:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:02,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 17:59:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:59:02,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716726342] [2020-08-21 17:59:02,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:59:02,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:59:02,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218435658] [2020-08-21 17:59:02,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:59:02,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:59:02,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:59:02,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:59:02,278 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand 6 states. [2020-08-21 17:59:02,604 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:59:03,687 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:59:04,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:59:04,319 INFO L93 Difference]: Finished difference Result 324 states and 398 transitions. [2020-08-21 17:59:04,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:59:04,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-21 17:59:04,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:59:04,322 INFO L225 Difference]: With dead ends: 324 [2020-08-21 17:59:04,323 INFO L226 Difference]: Without dead ends: 234 [2020-08-21 17:59:04,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:59:04,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-21 17:59:04,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 193. [2020-08-21 17:59:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-08-21 17:59:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 222 transitions. [2020-08-21 17:59:04,378 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 222 transitions. Word has length 65 [2020-08-21 17:59:04,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:59:04,379 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 222 transitions. [2020-08-21 17:59:04,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:59:04,379 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 222 transitions. [2020-08-21 17:59:04,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 17:59:04,380 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:59:04,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:59:04,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:59:04,381 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:59:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:59:04,381 INFO L82 PathProgramCache]: Analyzing trace with hash -913158347, now seen corresponding path program 1 times [2020-08-21 17:59:04,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:59:04,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735927238] [2020-08-21 17:59:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:59:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:04,667 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:59:04,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:59:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:04,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:59:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:04,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:59:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:04,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:59:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:04,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:59:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:04,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 17:59:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:04,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:59:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:04,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:59:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:04,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:59:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:04,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 17:59:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:04,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 17:59:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:04,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 17:59:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:59:04,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735927238] [2020-08-21 17:59:04,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:59:04,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:59:04,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688851805] [2020-08-21 17:59:04,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:59:04,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:59:04,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:59:04,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:59:04,751 INFO L87 Difference]: Start difference. First operand 193 states and 222 transitions. Second operand 8 states. [2020-08-21 17:59:05,205 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:59:06,546 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:59:06,836 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:59:07,079 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:59:07,294 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:59:07,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:59:07,879 INFO L93 Difference]: Finished difference Result 528 states and 662 transitions. [2020-08-21 17:59:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:59:07,879 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-08-21 17:59:07,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:59:07,882 INFO L225 Difference]: With dead ends: 528 [2020-08-21 17:59:07,883 INFO L226 Difference]: Without dead ends: 359 [2020-08-21 17:59:07,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:59:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-08-21 17:59:07,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 319. [2020-08-21 17:59:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-08-21 17:59:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 373 transitions. [2020-08-21 17:59:07,950 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 373 transitions. Word has length 79 [2020-08-21 17:59:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:59:07,951 INFO L479 AbstractCegarLoop]: Abstraction has 319 states and 373 transitions. [2020-08-21 17:59:07,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:59:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 373 transitions. [2020-08-21 17:59:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 17:59:07,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:59:07,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:59:07,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:59:07,954 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:59:07,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:59:07,954 INFO L82 PathProgramCache]: Analyzing trace with hash 421166267, now seen corresponding path program 1 times [2020-08-21 17:59:07,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:59:07,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947863340] [2020-08-21 17:59:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:59:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:08,253 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:59:08,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:59:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:08,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:59:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:08,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:59:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:08,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:59:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:08,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:59:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:08,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:59:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:08,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:59:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:08,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:59:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:08,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:59:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:08,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:59:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:08,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 17:59:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:08,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 17:59:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:08,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 17:59:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:59:08,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947863340] [2020-08-21 17:59:08,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:59:08,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:59:08,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292370294] [2020-08-21 17:59:08,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:59:08,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:59:08,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:59:08,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:59:08,380 INFO L87 Difference]: Start difference. First operand 319 states and 373 transitions. Second operand 9 states. [2020-08-21 17:59:08,792 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:59:09,324 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:59:10,803 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:59:12,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:59:12,201 INFO L93 Difference]: Finished difference Result 770 states and 989 transitions. [2020-08-21 17:59:12,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 17:59:12,202 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-08-21 17:59:12,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:59:12,208 INFO L225 Difference]: With dead ends: 770 [2020-08-21 17:59:12,208 INFO L226 Difference]: Without dead ends: 590 [2020-08-21 17:59:12,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-08-21 17:59:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-08-21 17:59:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 524. [2020-08-21 17:59:12,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-08-21 17:59:12,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 634 transitions. [2020-08-21 17:59:12,307 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 634 transitions. Word has length 83 [2020-08-21 17:59:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:59:12,307 INFO L479 AbstractCegarLoop]: Abstraction has 524 states and 634 transitions. [2020-08-21 17:59:12,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:59:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 634 transitions. [2020-08-21 17:59:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 17:59:12,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:59:12,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:59:12,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:59:12,310 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:59:12,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:59:12,310 INFO L82 PathProgramCache]: Analyzing trace with hash 750932028, now seen corresponding path program 1 times [2020-08-21 17:59:12,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:59:12,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747679725] [2020-08-21 17:59:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:59:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:12,529 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:59:12,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:59:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:12,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:59:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:12,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:59:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:12,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:59:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:12,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:59:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:12,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:59:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:12,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:59:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:12,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:59:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:12,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:59:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:12,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:59:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:12,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 17:59:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:12,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 17:59:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:12,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 17:59:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:59:12,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747679725] [2020-08-21 17:59:12,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:59:12,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:59:12,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864898147] [2020-08-21 17:59:12,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:59:12,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:59:12,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:59:12,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:59:12,677 INFO L87 Difference]: Start difference. First operand 524 states and 634 transitions. Second operand 8 states. [2020-08-21 17:59:13,540 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:59:13,750 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:59:14,014 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:59:14,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:59:14,912 INFO L93 Difference]: Finished difference Result 947 states and 1187 transitions. [2020-08-21 17:59:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 17:59:14,915 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-08-21 17:59:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:59:14,918 INFO L225 Difference]: With dead ends: 947 [2020-08-21 17:59:14,919 INFO L226 Difference]: Without dead ends: 566 [2020-08-21 17:59:14,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:59:14,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-08-21 17:59:15,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 524. [2020-08-21 17:59:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-08-21 17:59:15,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 633 transitions. [2020-08-21 17:59:15,046 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 633 transitions. Word has length 83 [2020-08-21 17:59:15,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:59:15,047 INFO L479 AbstractCegarLoop]: Abstraction has 524 states and 633 transitions. [2020-08-21 17:59:15,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:59:15,047 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 633 transitions. [2020-08-21 17:59:15,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 17:59:15,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:59:15,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:59:15,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:59:15,051 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:59:15,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:59:15,052 INFO L82 PathProgramCache]: Analyzing trace with hash 678545470, now seen corresponding path program 1 times [2020-08-21 17:59:15,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:59:15,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540583728] [2020-08-21 17:59:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:59:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:15,310 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:59:15,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:59:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:15,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:59:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:15,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:59:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:15,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:59:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:15,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:59:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:15,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:59:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:15,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:59:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:15,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:59:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:15,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:59:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:15,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:59:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:15,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 17:59:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:15,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 17:59:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:15,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 17:59:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:59:15,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540583728] [2020-08-21 17:59:15,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:59:15,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 17:59:15,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855862693] [2020-08-21 17:59:15,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:59:15,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:59:15,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:59:15,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:59:15,444 INFO L87 Difference]: Start difference. First operand 524 states and 633 transitions. Second operand 12 states. [2020-08-21 17:59:15,937 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:59:16,176 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:59:16,397 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:59:17,036 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:59:17,268 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:59:17,517 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:59:17,739 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:59:18,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:59:18,808 INFO L93 Difference]: Finished difference Result 1071 states and 1335 transitions. [2020-08-21 17:59:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 17:59:18,809 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-08-21 17:59:18,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:59:18,812 INFO L225 Difference]: With dead ends: 1071 [2020-08-21 17:59:18,813 INFO L226 Difference]: Without dead ends: 571 [2020-08-21 17:59:18,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-08-21 17:59:18,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-08-21 17:59:18,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 531. [2020-08-21 17:59:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2020-08-21 17:59:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 640 transitions. [2020-08-21 17:59:18,917 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 640 transitions. Word has length 83 [2020-08-21 17:59:18,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:59:18,918 INFO L479 AbstractCegarLoop]: Abstraction has 531 states and 640 transitions. [2020-08-21 17:59:18,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:59:18,918 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 640 transitions. [2020-08-21 17:59:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-21 17:59:18,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:59:18,922 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:59:18,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:59:18,923 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:59:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:59:18,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1174041569, now seen corresponding path program 1 times [2020-08-21 17:59:18,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:59:18,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447002878] [2020-08-21 17:59:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:59:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,225 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:59:19,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:59:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:59:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:59:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:59:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:59:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:59:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:59:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:59:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:59:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:59:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:59:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:59:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 17:59:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 17:59:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 17:59:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 17:59:19,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447002878] [2020-08-21 17:59:19,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:59:19,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 17:59:19,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773141320] [2020-08-21 17:59:19,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:59:19,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:59:19,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:59:19,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:59:19,523 INFO L87 Difference]: Start difference. First operand 531 states and 640 transitions. Second operand 12 states. [2020-08-21 17:59:20,742 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:59:21,430 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:59:22,206 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:59:22,517 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:59:22,796 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:59:23,044 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:59:23,318 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:59:23,579 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:59:24,045 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 191 [2020-08-21 17:59:24,294 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:59:24,569 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:59:24,849 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 17:59:26,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:59:26,897 INFO L93 Difference]: Finished difference Result 1563 states and 1960 transitions. [2020-08-21 17:59:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 17:59:26,898 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 95 [2020-08-21 17:59:26,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:59:26,906 INFO L225 Difference]: With dead ends: 1563 [2020-08-21 17:59:26,906 INFO L226 Difference]: Without dead ends: 1056 [2020-08-21 17:59:26,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2020-08-21 17:59:26,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2020-08-21 17:59:27,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 998. [2020-08-21 17:59:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 998 states. [2020-08-21 17:59:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1189 transitions. [2020-08-21 17:59:27,083 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1189 transitions. Word has length 95 [2020-08-21 17:59:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:59:27,083 INFO L479 AbstractCegarLoop]: Abstraction has 998 states and 1189 transitions. [2020-08-21 17:59:27,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:59:27,084 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1189 transitions. [2020-08-21 17:59:27,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 17:59:27,087 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:59:27,087 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:59:27,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:59:27,087 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:59:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:59:27,088 INFO L82 PathProgramCache]: Analyzing trace with hash 175480453, now seen corresponding path program 1 times [2020-08-21 17:59:27,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:59:27,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267783707] [2020-08-21 17:59:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:59:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,397 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:59:27,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:59:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:59:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:59:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:59:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:59:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:59:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 17:59:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:59:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:59:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:59:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:59:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:59:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:59:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 17:59:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 17:59:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 17:59:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 17:59:27,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267783707] [2020-08-21 17:59:27,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:59:27,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 17:59:27,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952909971] [2020-08-21 17:59:27,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 17:59:27,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:59:27,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 17:59:27,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:59:27,546 INFO L87 Difference]: Start difference. First operand 998 states and 1189 transitions. Second operand 14 states. [2020-08-21 17:59:28,549 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:59:28,784 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:59:29,007 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:59:29,540 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:59:30,236 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:59:30,584 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:59:31,230 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:59:31,478 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:59:31,728 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:59:33,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:59:33,195 INFO L93 Difference]: Finished difference Result 2050 states and 2569 transitions. [2020-08-21 17:59:33,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 17:59:33,196 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2020-08-21 17:59:33,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:59:33,203 INFO L225 Difference]: With dead ends: 2050 [2020-08-21 17:59:33,203 INFO L226 Difference]: Without dead ends: 1076 [2020-08-21 17:59:33,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2020-08-21 17:59:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2020-08-21 17:59:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 914. [2020-08-21 17:59:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 914 states. [2020-08-21 17:59:33,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1085 transitions. [2020-08-21 17:59:33,347 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1085 transitions. Word has length 99 [2020-08-21 17:59:33,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:59:33,347 INFO L479 AbstractCegarLoop]: Abstraction has 914 states and 1085 transitions. [2020-08-21 17:59:33,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 17:59:33,348 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1085 transitions. [2020-08-21 17:59:33,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 17:59:33,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:59:33,350 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:59:33,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:59:33,350 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:59:33,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:59:33,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1676429373, now seen corresponding path program 1 times [2020-08-21 17:59:33,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:59:33,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715884031] [2020-08-21 17:59:33,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:59:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,687 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:59:33,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:59:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:59:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:59:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:59:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:59:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 17:59:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:59:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:59:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:59:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:59:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:59:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:59:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:59:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 17:59:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 17:59:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 17:59:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:59:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 17:59:33,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715884031] [2020-08-21 17:59:33,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:59:33,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 17:59:33,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627356383] [2020-08-21 17:59:33,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 17:59:33,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:59:33,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 17:59:33,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:59:33,828 INFO L87 Difference]: Start difference. First operand 914 states and 1085 transitions. Second operand 13 states. [2020-08-21 17:59:34,371 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:59:34,622 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:59:34,877 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:59:35,874 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:59:36,369 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:59:36,674 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:59:36,937 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 17:59:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:59:37,585 INFO L93 Difference]: Finished difference Result 1575 states and 1874 transitions. [2020-08-21 17:59:37,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 17:59:37,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 99 [2020-08-21 17:59:37,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:59:37,587 INFO L225 Difference]: With dead ends: 1575 [2020-08-21 17:59:37,587 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 17:59:37,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-08-21 17:59:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 17:59:37,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 17:59:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 17:59:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 17:59:37,593 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 99 [2020-08-21 17:59:37,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:59:37,593 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 17:59:37,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 17:59:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 17:59:37,593 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 17:59:37,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:59:37,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 17:59:38,592 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 248 [2020-08-21 17:59:40,132 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 244 [2020-08-21 17:59:40,573 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 248 [2020-08-21 17:59:42,276 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 244 [2020-08-21 17:59:43,295 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 26 [2020-08-21 17:59:44,446 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 162 DAG size of output: 30 [2020-08-21 17:59:45,244 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 39 [2020-08-21 17:59:45,402 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 1 [2020-08-21 17:59:45,561 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 22 [2020-08-21 17:59:45,716 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 1 [2020-08-21 17:59:46,342 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 33 [2020-08-21 17:59:47,461 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 170 DAG size of output: 38 [2020-08-21 17:59:48,018 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 30 [2020-08-21 17:59:48,180 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 1 [2020-08-21 17:59:48,354 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 22 [2020-08-21 17:59:48,916 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 30