/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product40.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:43:06,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:43:06,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:43:06,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:43:06,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:43:06,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:43:06,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:43:06,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:43:06,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:43:06,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:43:06,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:43:06,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:43:06,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:43:06,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:43:06,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:43:06,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:43:06,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:43:06,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:43:06,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:43:06,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:43:06,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:43:06,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:43:06,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:43:06,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:43:06,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:43:06,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:43:06,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:43:06,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:43:06,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:43:06,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 03:43:06,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 03:43:06,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 03:43:06,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 03:43:06,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 03:43:06,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 03:43:06,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 03:43:06,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 03:43:06,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 03:43:06,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:43:06,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:43:06,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:43:06,104 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 03:43:06,128 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:43:06,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:43:06,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:43:06,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:43:06,130 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:43:06,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:43:06,130 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:43:06,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:43:06,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:43:06,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:43:06,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:43:06,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:43:06,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:43:06,131 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:43:06,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:43:06,132 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:43:06,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:43:06,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:43:06,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:43:06,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:43:06,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:43:06,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:43:06,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:43:06,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:43:06,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:43:06,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:43:06,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:43:06,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:43:06,134 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:43:06,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-08-22 03:43:06,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:43:06,488 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:43:06,492 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:43:06,494 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:43:06,496 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:43:06,496 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product40.cil.c [2020-08-22 03:43:06,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c000de2d/9e8e469ac2774995a0dbd3cae89dfee4/FLAGa96eec445 [2020-08-22 03:43:07,138 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:43:07,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product40.cil.c [2020-08-22 03:43:07,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c000de2d/9e8e469ac2774995a0dbd3cae89dfee4/FLAGa96eec445 [2020-08-22 03:43:07,436 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c000de2d/9e8e469ac2774995a0dbd3cae89dfee4 [2020-08-22 03:43:07,444 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:43:07,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:43:07,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:43:07,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:43:07,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:43:07,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:43:07" (1/1) ... [2020-08-22 03:43:07,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73cebe9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:43:07, skipping insertion in model container [2020-08-22 03:43:07,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:43:07" (1/1) ... [2020-08-22 03:43:07,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:43:07,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:43:08,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:43:08,035 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:43:08,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:43:08,155 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:43:08,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:43:08 WrapperNode [2020-08-22 03:43:08,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:43:08,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:43:08,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:43:08,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:43:08,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:43:08" (1/1) ... [2020-08-22 03:43:08,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:43:08" (1/1) ... [2020-08-22 03:43:08,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:43:08" (1/1) ... [2020-08-22 03:43:08,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:43:08" (1/1) ... [2020-08-22 03:43:08,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:43:08" (1/1) ... [2020-08-22 03:43:08,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:43:08" (1/1) ... [2020-08-22 03:43:08,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:43:08" (1/1) ... [2020-08-22 03:43:08,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:43:08,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:43:08,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:43:08,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:43:08,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:43:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:43:08,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:43:08,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:43:08,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-22 03:43:08,323 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-22 03:43:08,323 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-22 03:43:08,323 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-22 03:43:08,324 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-22 03:43:08,324 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-22 03:43:08,324 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-22 03:43:08,325 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-22 03:43:08,325 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-22 03:43:08,325 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-22 03:43:08,325 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-22 03:43:08,325 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-22 03:43:08,326 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-22 03:43:08,326 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-22 03:43:08,327 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-22 03:43:08,327 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-22 03:43:08,327 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-22 03:43:08,327 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-22 03:43:08,327 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-22 03:43:08,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:43:08,327 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-22 03:43:08,328 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-22 03:43:08,328 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-22 03:43:08,329 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-22 03:43:08,329 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-22 03:43:08,329 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-22 03:43:08,329 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-22 03:43:08,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-22 03:43:08,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-22 03:43:08,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-22 03:43:08,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-22 03:43:08,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-22 03:43:08,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-22 03:43:08,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-22 03:43:08,331 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-22 03:43:08,331 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-22 03:43:08,331 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-22 03:43:08,331 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-22 03:43:08,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:43:08,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 03:43:08,331 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-22 03:43:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-22 03:43:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-22 03:43:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-22 03:43:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-22 03:43:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-22 03:43:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-22 03:43:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-22 03:43:08,333 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-22 03:43:08,333 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-22 03:43:08,333 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-22 03:43:08,333 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-22 03:43:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-22 03:43:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-22 03:43:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-22 03:43:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-22 03:43:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-22 03:43:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-22 03:43:08,335 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-22 03:43:08,335 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-22 03:43:08,335 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-22 03:43:08,335 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-22 03:43:08,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 03:43:08,335 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-22 03:43:08,335 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-22 03:43:08,336 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-22 03:43:08,336 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-22 03:43:08,336 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-22 03:43:08,336 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-22 03:43:08,337 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-22 03:43:08,338 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:43:08,338 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-22 03:43:08,339 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-22 03:43:08,339 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 03:43:08,339 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 03:43:08,339 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-22 03:43:08,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 03:43:08,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 03:43:08,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 03:43:08,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 03:43:08,341 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-22 03:43:08,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 03:43:08,341 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-22 03:43:08,341 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-22 03:43:08,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 03:43:08,341 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-22 03:43:08,342 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-22 03:43:08,342 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-22 03:43:08,342 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-22 03:43:08,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:43:08,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-22 03:43:08,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:43:09,364 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:43:09,364 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-22 03:43:09,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:43:09 BoogieIcfgContainer [2020-08-22 03:43:09,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:43:09,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:43:09,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:43:09,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:43:09,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:43:07" (1/3) ... [2020-08-22 03:43:09,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53dd70c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:43:09, skipping insertion in model container [2020-08-22 03:43:09,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:43:08" (2/3) ... [2020-08-22 03:43:09,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53dd70c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:43:09, skipping insertion in model container [2020-08-22 03:43:09,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:43:09" (3/3) ... [2020-08-22 03:43:09,378 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product40.cil.c [2020-08-22 03:43:09,389 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:43:09,397 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:43:09,411 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:43:09,436 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:43:09,436 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:43:09,436 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:43:09,436 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:43:09,437 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:43:09,437 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:43:09,437 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:43:09,437 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:43:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states. [2020-08-22 03:43:09,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 03:43:09,469 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:43:09,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:43:09,470 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:43:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:43:09,476 INFO L82 PathProgramCache]: Analyzing trace with hash -656044244, now seen corresponding path program 1 times [2020-08-22 03:43:09,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:43:09,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835726398] [2020-08-22 03:43:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:43:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:10,163 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:43:10,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:43:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:10,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:43:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:10,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:43:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:10,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:43:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:10,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:43:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:10,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 03:43:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:10,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 03:43:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:43:10,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835726398] [2020-08-22 03:43:10,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:43:10,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:43:10,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247226190] [2020-08-22 03:43:10,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:43:10,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:43:10,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:43:10,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:43:10,298 INFO L87 Difference]: Start difference. First operand 179 states. Second operand 3 states. [2020-08-22 03:43:11,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:43:11,523 INFO L93 Difference]: Finished difference Result 316 states and 411 transitions. [2020-08-22 03:43:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:43:11,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-22 03:43:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:43:11,546 INFO L225 Difference]: With dead ends: 316 [2020-08-22 03:43:11,547 INFO L226 Difference]: Without dead ends: 171 [2020-08-22 03:43:11,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:43:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-08-22 03:43:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2020-08-22 03:43:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-22 03:43:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2020-08-22 03:43:11,657 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 46 [2020-08-22 03:43:11,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:43:11,658 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2020-08-22 03:43:11,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:43:11,658 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2020-08-22 03:43:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 03:43:11,662 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:43:11,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:43:11,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:43:11,663 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:43:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:43:11,663 INFO L82 PathProgramCache]: Analyzing trace with hash 679222766, now seen corresponding path program 1 times [2020-08-22 03:43:11,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:43:11,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347840753] [2020-08-22 03:43:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:43:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:11,977 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:43:11,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:43:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:12,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:43:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:12,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:43:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:12,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:43:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:12,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:43:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:12,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 03:43:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:12,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 03:43:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:43:12,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347840753] [2020-08-22 03:43:12,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:43:12,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:43:12,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599576793] [2020-08-22 03:43:12,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:43:12,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:43:12,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:43:12,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:43:12,021 INFO L87 Difference]: Start difference. First operand 136 states and 159 transitions. Second operand 4 states. [2020-08-22 03:43:12,411 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:43:13,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:43:13,269 INFO L93 Difference]: Finished difference Result 239 states and 290 transitions. [2020-08-22 03:43:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:43:13,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-22 03:43:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:43:13,273 INFO L225 Difference]: With dead ends: 239 [2020-08-22 03:43:13,274 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 03:43:13,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:43:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 03:43:13,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 127. [2020-08-22 03:43:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-22 03:43:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2020-08-22 03:43:13,320 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 47 [2020-08-22 03:43:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:43:13,320 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2020-08-22 03:43:13,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:43:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2020-08-22 03:43:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 03:43:13,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:43:13,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:43:13,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:43:13,323 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:43:13,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:43:13,324 INFO L82 PathProgramCache]: Analyzing trace with hash 496169114, now seen corresponding path program 1 times [2020-08-22 03:43:13,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:43:13,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423895569] [2020-08-22 03:43:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:43:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:13,643 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:43:13,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:43:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:13,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:43:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:13,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:43:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:13,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:43:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:13,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:43:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:13,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 03:43:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:13,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 03:43:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:43:13,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423895569] [2020-08-22 03:43:13,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:43:13,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 03:43:13,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273377526] [2020-08-22 03:43:13,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:43:13,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:43:13,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:43:13,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:43:13,765 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand 8 states. [2020-08-22 03:43:14,095 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:43:14,409 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:14,640 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:14,868 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:15,584 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:43:17,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:43:17,377 INFO L93 Difference]: Finished difference Result 436 states and 538 transitions. [2020-08-22 03:43:17,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:43:17,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-22 03:43:17,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:43:17,385 INFO L225 Difference]: With dead ends: 436 [2020-08-22 03:43:17,386 INFO L226 Difference]: Without dead ends: 333 [2020-08-22 03:43:17,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:43:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-08-22 03:43:17,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 268. [2020-08-22 03:43:17,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-22 03:43:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 322 transitions. [2020-08-22 03:43:17,475 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 322 transitions. Word has length 52 [2020-08-22 03:43:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:43:17,476 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 322 transitions. [2020-08-22 03:43:17,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:43:17,476 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 322 transitions. [2020-08-22 03:43:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 03:43:17,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:43:17,482 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] [2020-08-22 03:43:17,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:43:17,483 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:43:17,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:43:17,483 INFO L82 PathProgramCache]: Analyzing trace with hash 987448314, now seen corresponding path program 1 times [2020-08-22 03:43:17,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:43:17,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820888476] [2020-08-22 03:43:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:43:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:17,837 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:43:17,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:43:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:17,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:43:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:17,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:43:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:17,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:43:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:17,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:43:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:17,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 03:43:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:17,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 03:43:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:17,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 03:43:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:43:17,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820888476] [2020-08-22 03:43:17,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:43:17,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 03:43:17,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112060791] [2020-08-22 03:43:17,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 03:43:17,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:43:17,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 03:43:17,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:43:17,944 INFO L87 Difference]: Start difference. First operand 268 states and 322 transitions. Second operand 12 states. [2020-08-22 03:43:18,329 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:43:18,658 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:18,939 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:19,225 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:19,783 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:43:20,563 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:20,928 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 03:43:21,245 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 03:43:21,543 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:43:21,890 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 03:43:22,384 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 03:43:22,715 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 03:43:22,972 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:24,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:43:24,944 INFO L93 Difference]: Finished difference Result 1085 states and 1492 transitions. [2020-08-22 03:43:24,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 03:43:24,952 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-22 03:43:24,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:43:24,962 INFO L225 Difference]: With dead ends: 1085 [2020-08-22 03:43:24,962 INFO L226 Difference]: Without dead ends: 841 [2020-08-22 03:43:24,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-22 03:43:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2020-08-22 03:43:25,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 744. [2020-08-22 03:43:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-08-22 03:43:25,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 944 transitions. [2020-08-22 03:43:25,195 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 944 transitions. Word has length 57 [2020-08-22 03:43:25,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:43:25,196 INFO L479 AbstractCegarLoop]: Abstraction has 744 states and 944 transitions. [2020-08-22 03:43:25,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 03:43:25,196 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 944 transitions. [2020-08-22 03:43:25,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 03:43:25,199 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:43:25,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:43:25,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:43:25,200 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:43:25,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:43:25,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1158385600, now seen corresponding path program 1 times [2020-08-22 03:43:25,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:43:25,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114104858] [2020-08-22 03:43:25,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:43:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:25,497 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:43:25,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:43:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:25,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:43:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:25,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:43:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:25,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:43:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:25,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:43:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:25,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 03:43:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:25,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 03:43:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:25,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 03:43:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:25,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 03:43:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:43:25,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114104858] [2020-08-22 03:43:25,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:43:25,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 03:43:25,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785441979] [2020-08-22 03:43:25,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:43:25,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:43:25,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:43:25,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:43:25,619 INFO L87 Difference]: Start difference. First operand 744 states and 944 transitions. Second operand 6 states. [2020-08-22 03:43:25,926 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:43:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:43:27,428 INFO L93 Difference]: Finished difference Result 1799 states and 2451 transitions. [2020-08-22 03:43:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 03:43:27,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-22 03:43:27,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:43:27,437 INFO L225 Difference]: With dead ends: 1799 [2020-08-22 03:43:27,438 INFO L226 Difference]: Without dead ends: 1079 [2020-08-22 03:43:27,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:43:27,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2020-08-22 03:43:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 988. [2020-08-22 03:43:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2020-08-22 03:43:27,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1244 transitions. [2020-08-22 03:43:27,636 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1244 transitions. Word has length 61 [2020-08-22 03:43:27,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:43:27,637 INFO L479 AbstractCegarLoop]: Abstraction has 988 states and 1244 transitions. [2020-08-22 03:43:27,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:43:27,637 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1244 transitions. [2020-08-22 03:43:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 03:43:27,640 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:43:27,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:43:27,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:43:27,641 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:43:27,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:43:27,641 INFO L82 PathProgramCache]: Analyzing trace with hash -623744306, now seen corresponding path program 1 times [2020-08-22 03:43:27,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:43:27,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321407027] [2020-08-22 03:43:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:43:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:27,925 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:43:27,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:43:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:27,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:43:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:27,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:43:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:27,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:43:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:27,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:43:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:27,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 03:43:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:28,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 03:43:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:28,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 03:43:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:28,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:28,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:28,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 03:43:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:28,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 03:43:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:28,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 03:43:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 03:43:28,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321407027] [2020-08-22 03:43:28,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:43:28,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:43:28,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494963566] [2020-08-22 03:43:28,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:43:28,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:43:28,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:43:28,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:43:28,113 INFO L87 Difference]: Start difference. First operand 988 states and 1244 transitions. Second operand 10 states. [2020-08-22 03:43:28,861 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-22 03:43:29,441 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:43:31,313 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:43:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:43:33,153 INFO L93 Difference]: Finished difference Result 1921 states and 2525 transitions. [2020-08-22 03:43:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 03:43:33,154 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-22 03:43:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:43:33,162 INFO L225 Difference]: With dead ends: 1921 [2020-08-22 03:43:33,162 INFO L226 Difference]: Without dead ends: 1208 [2020-08-22 03:43:33,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-22 03:43:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2020-08-22 03:43:33,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1095. [2020-08-22 03:43:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1095 states. [2020-08-22 03:43:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1355 transitions. [2020-08-22 03:43:33,343 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1355 transitions. Word has length 89 [2020-08-22 03:43:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:43:33,343 INFO L479 AbstractCegarLoop]: Abstraction has 1095 states and 1355 transitions. [2020-08-22 03:43:33,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:43:33,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1355 transitions. [2020-08-22 03:43:33,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-22 03:43:33,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:43:33,348 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:43:33,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:43:33,348 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:43:33,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:43:33,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1382968030, now seen corresponding path program 1 times [2020-08-22 03:43:33,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:43:33,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835897447] [2020-08-22 03:43:33,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:43:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,607 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:43:33,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:43:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:43:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:43:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:43:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:43:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 03:43:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 03:43:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 03:43:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 03:43:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 03:43:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 03:43:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 03:43:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 03:43:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-22 03:43:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 03:43:33,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835897447] [2020-08-22 03:43:33,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:43:33,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 03:43:33,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853169138] [2020-08-22 03:43:33,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 03:43:33,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:43:33,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 03:43:33,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:43:33,883 INFO L87 Difference]: Start difference. First operand 1095 states and 1355 transitions. Second operand 12 states. [2020-08-22 03:43:34,537 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:43:34,766 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:43:34,983 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:43:35,649 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:43:35,893 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:43:36,135 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:43:37,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:43:37,214 INFO L93 Difference]: Finished difference Result 2280 states and 2962 transitions. [2020-08-22 03:43:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 03:43:37,215 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 132 [2020-08-22 03:43:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:43:37,224 INFO L225 Difference]: With dead ends: 2280 [2020-08-22 03:43:37,224 INFO L226 Difference]: Without dead ends: 1209 [2020-08-22 03:43:37,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-22 03:43:37,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2020-08-22 03:43:37,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1095. [2020-08-22 03:43:37,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1095 states. [2020-08-22 03:43:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1351 transitions. [2020-08-22 03:43:37,406 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1351 transitions. Word has length 132 [2020-08-22 03:43:37,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:43:37,407 INFO L479 AbstractCegarLoop]: Abstraction has 1095 states and 1351 transitions. [2020-08-22 03:43:37,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 03:43:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1351 transitions. [2020-08-22 03:43:37,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 03:43:37,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:43:37,412 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:43:37,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:43:37,412 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:43:37,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:43:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1689143082, now seen corresponding path program 1 times [2020-08-22 03:43:37,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:43:37,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972309338] [2020-08-22 03:43:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:43:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,680 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:43:37,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:43:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:43:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:43:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:43:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:43:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 03:43:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 03:43:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 03:43:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 03:43:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 03:43:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 03:43:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 03:43:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-22 03:43:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 03:43:37,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972309338] [2020-08-22 03:43:37,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:43:37,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:43:37,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623848835] [2020-08-22 03:43:37,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:43:37,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:43:37,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:43:37,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:43:37,862 INFO L87 Difference]: Start difference. First operand 1095 states and 1351 transitions. Second operand 10 states. [2020-08-22 03:43:39,151 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:39,394 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-22 03:43:39,652 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:43:39,890 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:43:40,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:43:40,705 INFO L93 Difference]: Finished difference Result 2085 states and 2647 transitions. [2020-08-22 03:43:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:43:40,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 128 [2020-08-22 03:43:40,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:43:40,713 INFO L225 Difference]: With dead ends: 2085 [2020-08-22 03:43:40,713 INFO L226 Difference]: Without dead ends: 1014 [2020-08-22 03:43:40,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:43:40,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2020-08-22 03:43:40,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 956. [2020-08-22 03:43:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956 states. [2020-08-22 03:43:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1156 transitions. [2020-08-22 03:43:40,973 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1156 transitions. Word has length 128 [2020-08-22 03:43:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:43:40,974 INFO L479 AbstractCegarLoop]: Abstraction has 956 states and 1156 transitions. [2020-08-22 03:43:40,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:43:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1156 transitions. [2020-08-22 03:43:40,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-22 03:43:40,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:43:40,982 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:43:40,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:43:40,983 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:43:40,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:43:40,984 INFO L82 PathProgramCache]: Analyzing trace with hash -855657151, now seen corresponding path program 1 times [2020-08-22 03:43:40,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:43:40,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435377950] [2020-08-22 03:43:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:43:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,271 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:43:41,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:43:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:43:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:43:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:43:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:43:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 03:43:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 03:43:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 03:43:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 03:43:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 03:43:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 03:43:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 03:43:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 03:43:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-22 03:43:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 03:43:41,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435377950] [2020-08-22 03:43:41,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:43:41,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:43:41,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800982380] [2020-08-22 03:43:41,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:43:41,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:43:41,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:43:41,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:43:41,502 INFO L87 Difference]: Start difference. First operand 956 states and 1156 transitions. Second operand 13 states. [2020-08-22 03:43:41,982 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:43:42,703 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:43:44,879 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:45,152 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:45,413 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:45,670 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 03:43:45,985 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:46,235 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 03:43:46,474 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:46,718 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 03:43:46,995 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 03:43:47,228 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 03:43:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:43:47,946 INFO L93 Difference]: Finished difference Result 2764 states and 3470 transitions. [2020-08-22 03:43:47,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 03:43:47,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 132 [2020-08-22 03:43:47,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:43:47,958 INFO L225 Difference]: With dead ends: 2764 [2020-08-22 03:43:47,958 INFO L226 Difference]: Without dead ends: 1832 [2020-08-22 03:43:47,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 03:43:47,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2020-08-22 03:43:48,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1727. [2020-08-22 03:43:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1727 states. [2020-08-22 03:43:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2059 transitions. [2020-08-22 03:43:48,335 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2059 transitions. Word has length 132 [2020-08-22 03:43:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:43:48,337 INFO L479 AbstractCegarLoop]: Abstraction has 1727 states and 2059 transitions. [2020-08-22 03:43:48,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:43:48,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2059 transitions. [2020-08-22 03:43:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 03:43:48,342 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:43:48,342 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:43:48,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:43:48,343 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:43:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:43:48,343 INFO L82 PathProgramCache]: Analyzing trace with hash -242335011, now seen corresponding path program 1 times [2020-08-22 03:43:48,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:43:48,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451547163] [2020-08-22 03:43:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:43:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,659 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:43:48,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:43:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:43:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:43:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:43:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:43:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 03:43:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 03:43:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 03:43:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 03:43:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 03:43:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 03:43:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 03:43:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 03:43:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 03:43:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-22 03:43:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-22 03:43:48,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451547163] [2020-08-22 03:43:48,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:43:48,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 03:43:48,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74424791] [2020-08-22 03:43:48,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 03:43:48,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:43:48,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 03:43:48,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:43:48,878 INFO L87 Difference]: Start difference. First operand 1727 states and 2059 transitions. Second operand 11 states. [2020-08-22 03:43:49,453 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:43:51,787 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:52,015 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:43:52,265 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:52,510 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:52,759 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 03:43:53,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:43:53,234 INFO L93 Difference]: Finished difference Result 2058 states and 2631 transitions. [2020-08-22 03:43:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 03:43:53,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-22 03:43:53,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:43:53,247 INFO L225 Difference]: With dead ends: 2058 [2020-08-22 03:43:53,247 INFO L226 Difference]: Without dead ends: 2055 [2020-08-22 03:43:53,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-08-22 03:43:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2020-08-22 03:43:53,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 1727. [2020-08-22 03:43:53,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1727 states. [2020-08-22 03:43:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2049 transitions. [2020-08-22 03:43:53,714 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2049 transitions. Word has length 136 [2020-08-22 03:43:53,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:43:53,714 INFO L479 AbstractCegarLoop]: Abstraction has 1727 states and 2049 transitions. [2020-08-22 03:43:53,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 03:43:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2049 transitions. [2020-08-22 03:43:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 03:43:53,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:43:53,719 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:43:53,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:43:53,720 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:43:53,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:43:53,720 INFO L82 PathProgramCache]: Analyzing trace with hash 2128978130, now seen corresponding path program 1 times [2020-08-22 03:43:53,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:43:53,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164228612] [2020-08-22 03:43:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:43:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,010 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 03:43:54,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:43:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 03:43:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:43:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 03:43:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 03:43:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 03:43:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 03:43:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 03:43:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 03:43:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 03:43:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 03:43:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 03:43:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 03:43:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:43:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 03:43:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-22 03:43:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:43:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 03:43:54,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164228612] [2020-08-22 03:43:54,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:43:54,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 03:43:54,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152099950] [2020-08-22 03:43:54,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 03:43:54,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:43:54,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 03:43:54,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:43:54,235 INFO L87 Difference]: Start difference. First operand 1727 states and 2049 transitions. Second operand 12 states. [2020-08-22 03:43:54,671 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:43:55,271 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:43:55,801 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:56,067 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:56,357 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:56,615 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 03:43:56,894 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 03:43:57,136 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 03:43:59,057 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 03:43:59,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:43:59,923 INFO L93 Difference]: Finished difference Result 4160 states and 5347 transitions. [2020-08-22 03:43:59,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 03:43:59,923 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 136 [2020-08-22 03:43:59,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:43:59,939 INFO L225 Difference]: With dead ends: 4160 [2020-08-22 03:43:59,940 INFO L226 Difference]: Without dead ends: 2775 [2020-08-22 03:43:59,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-08-22 03:43:59,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-08-22 03:44:00,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2303. [2020-08-22 03:44:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2303 states. [2020-08-22 03:44:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2786 transitions. [2020-08-22 03:44:00,400 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2786 transitions. Word has length 136 [2020-08-22 03:44:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:44:00,403 INFO L479 AbstractCegarLoop]: Abstraction has 2303 states and 2786 transitions. [2020-08-22 03:44:00,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 03:44:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2786 transitions. [2020-08-22 03:44:00,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-08-22 03:44:00,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:44:00,412 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:44:00,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:44:00,413 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:44:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:44:00,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2052523815, now seen corresponding path program 2 times [2020-08-22 03:44:00,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:44:00,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673591134] [2020-08-22 03:44:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:44:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 03:44:00,504 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 03:44:00,504 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 03:44:00,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 03:44:00,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:44:00 BoogieIcfgContainer [2020-08-22 03:44:00,544 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:44:00,546 INFO L168 Benchmark]: Toolchain (without parser) took 53100.56 ms. Allocated memory was 147.8 MB in the beginning and 958.4 MB in the end (delta: 810.5 MB). Free memory was 101.7 MB in the beginning and 352.1 MB in the end (delta: -250.4 MB). Peak memory consumption was 560.1 MB. Max. memory is 7.1 GB. [2020-08-22 03:44:00,547 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 03:44:00,547 INFO L168 Benchmark]: CACSL2BoogieTranslator took 708.81 ms. Allocated memory was 147.8 MB in the beginning and 202.9 MB in the end (delta: 55.1 MB). Free memory was 101.5 MB in the beginning and 168.7 MB in the end (delta: -67.2 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-08-22 03:44:00,548 INFO L168 Benchmark]: Boogie Preprocessor took 88.15 ms. Allocated memory is still 202.9 MB. Free memory was 168.7 MB in the beginning and 164.2 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB. [2020-08-22 03:44:00,548 INFO L168 Benchmark]: RCFGBuilder took 1124.74 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 164.2 MB in the beginning and 192.1 MB in the end (delta: -28.0 MB). Peak memory consumption was 79.2 MB. Max. memory is 7.1 GB. [2020-08-22 03:44:00,549 INFO L168 Benchmark]: TraceAbstraction took 51173.62 ms. Allocated memory was 235.4 MB in the beginning and 958.4 MB in the end (delta: 723.0 MB). Free memory was 192.1 MB in the beginning and 352.1 MB in the end (delta: -160.0 MB). Peak memory consumption was 563.0 MB. Max. memory is 7.1 GB. [2020-08-22 03:44:00,551 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 708.81 ms. Allocated memory was 147.8 MB in the beginning and 202.9 MB in the end (delta: 55.1 MB). Free memory was 101.5 MB in the beginning and 168.7 MB in the end (delta: -67.2 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 88.15 ms. Allocated memory is still 202.9 MB. Free memory was 168.7 MB in the beginning and 164.2 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1124.74 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 164.2 MB in the beginning and 192.1 MB in the end (delta: -28.0 MB). Peak memory consumption was 79.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 51173.62 ms. Allocated memory was 235.4 MB in the beginning and 958.4 MB in the end (delta: 723.0 MB). Free memory was 192.1 MB in the beginning and 352.1 MB in the end (delta: -160.0 MB). Peak memory consumption was 563.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 329]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L123] int pumpRunning = 0; [L124] int systemActive = 1; [L334] int cleanupTimeShifts = 4; [L434] int waterLevel = 1; [L435] int methaneLevelCritical = 0; [L697] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L410] int retValue_acc ; [L411] int tmp ; [L415] FCALL select_helpers() [L416] FCALL select_features() [L417] CALL, EXPR valid_product() [L946] int retValue_acc ; [L949] retValue_acc = 1 [L950] return (retValue_acc); [L417] RET, EXPR valid_product() [L417] tmp = valid_product() [L419] COND TRUE \read(tmp) [L421] FCALL setup() [L422] CALL runTest() [L401] CALL test() [L47] int splverifierCounter ; [L48] int tmp ; [L49] int tmp___0 ; [L50] int tmp___1 ; [L51] int tmp___2 ; [L54] splverifierCounter = 0 [L56] COND TRUE 1 [L58] COND TRUE splverifierCounter < 4 [L64] tmp = __VERIFIER_nondet_int() [L66] COND TRUE \read(tmp) [L68] CALL waterRise() [L452] COND TRUE waterLevel < 2 [L453] waterLevel = waterLevel + 1 [L68] RET waterRise() [L74] tmp___0 = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp___0)) [L84] tmp___2 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___2)) [L92] tmp___1 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___1)) [L103] CALL timeShift() [L131] COND FALSE !(\read(pumpRunning)) [L138] COND TRUE \read(systemActive) [L140] CALL processEnvironment() [L186] int tmp ; [L189] COND FALSE !(\read(pumpRunning)) [L204] CALL processEnvironment__wrappee__highWaterSensor() [L160] int tmp ; [L163] COND TRUE ! pumpRunning [L165] CALL, EXPR isHighWaterLevel() [L283] int retValue_acc ; [L284] int tmp ; [L285] int tmp___0 ; [L289] CALL, EXPR isHighWaterSensorDry() [L514] int retValue_acc ; [L517] COND FALSE !(waterLevel < 2) [L521] retValue_acc = 0 [L522] return (retValue_acc); [L289] RET, EXPR isHighWaterSensorDry() [L289] tmp = isHighWaterSensorDry() [L291] COND FALSE !(\read(tmp)) [L294] tmp___0 = 1 [L296] retValue_acc = tmp___0 [L297] return (retValue_acc); [L165] RET, EXPR isHighWaterLevel() [L165] tmp = isHighWaterLevel() [L167] COND TRUE \read(tmp) [L169] CALL activatePump() [L214] pumpRunning = 1 [L169] RET activatePump() [L204] RET processEnvironment__wrappee__highWaterSensor() [L140] RET processEnvironment() [L146] CALL __utac_acc__Specification4_spec__1() [L895] int tmp ; [L896] int tmp___0 ; [L900] CALL, EXPR getWaterLevel() [L505] int retValue_acc ; [L508] retValue_acc = waterLevel [L509] return (retValue_acc); [L900] RET, EXPR getWaterLevel() [L900] tmp = getWaterLevel() [L902] COND FALSE !(tmp == 0) [L146] RET __utac_acc__Specification4_spec__1() [L103] RET timeShift() [L56] COND TRUE 1 [L58] COND TRUE splverifierCounter < 4 [L64] tmp = __VERIFIER_nondet_int() [L66] COND FALSE !(\read(tmp)) [L74] tmp___0 = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp___0)) [L84] tmp___2 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___2)) [L92] tmp___1 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___1)) [L103] CALL timeShift() [L131] COND TRUE \read(pumpRunning) [L133] CALL lowerWaterLevel() [L440] COND TRUE waterLevel > 0 [L441] waterLevel = waterLevel - 1 [L133] RET lowerWaterLevel() [L138] COND TRUE \read(systemActive) [L140] CALL processEnvironment() [L186] int tmp ; [L189] COND TRUE \read(pumpRunning) [L191] CALL, EXPR isMethaneAlarm() [L227] int retValue_acc ; [L231] CALL, EXPR isMethaneLevelCritical() [L473] int retValue_acc ; [L476] retValue_acc = methaneLevelCritical [L477] return (retValue_acc); [L231] RET, EXPR isMethaneLevelCritical() [L231] retValue_acc = isMethaneLevelCritical() [L233] return (retValue_acc); [L191] RET, EXPR isMethaneAlarm() [L191] tmp = isMethaneAlarm() [L193] COND FALSE !(\read(tmp)) [L199] CALL processEnvironment__wrappee__highWaterSensor() [L160] int tmp ; [L163] COND FALSE !(! pumpRunning) [L178] FCALL processEnvironment__wrappee__base() [L199] RET processEnvironment__wrappee__highWaterSensor() [L140] RET processEnvironment() [L146] CALL __utac_acc__Specification4_spec__1() [L895] int tmp ; [L896] int tmp___0 ; [L900] CALL, EXPR getWaterLevel() [L505] int retValue_acc ; [L508] retValue_acc = waterLevel [L509] return (retValue_acc); [L900] RET, EXPR getWaterLevel() [L900] tmp = getWaterLevel() [L902] COND FALSE !(tmp == 0) [L146] RET __utac_acc__Specification4_spec__1() [L103] RET timeShift() [L56] COND TRUE 1 [L58] COND TRUE splverifierCounter < 4 [L64] tmp = __VERIFIER_nondet_int() [L66] COND FALSE !(\read(tmp)) [L74] tmp___0 = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp___0)) [L84] tmp___2 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___2)) [L92] tmp___1 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___1)) [L103] CALL timeShift() [L131] COND TRUE \read(pumpRunning) [L133] CALL lowerWaterLevel() [L440] COND TRUE waterLevel > 0 [L441] waterLevel = waterLevel - 1 [L133] RET lowerWaterLevel() [L138] COND TRUE \read(systemActive) [L140] CALL processEnvironment() [L186] int tmp ; [L189] COND TRUE \read(pumpRunning) [L191] CALL, EXPR isMethaneAlarm() [L227] int retValue_acc ; [L231] CALL, EXPR isMethaneLevelCritical() [L473] int retValue_acc ; [L476] retValue_acc = methaneLevelCritical [L477] return (retValue_acc); [L231] RET, EXPR isMethaneLevelCritical() [L231] retValue_acc = isMethaneLevelCritical() [L233] return (retValue_acc); [L191] RET, EXPR isMethaneAlarm() [L191] tmp = isMethaneAlarm() [L193] COND FALSE !(\read(tmp)) [L199] CALL processEnvironment__wrappee__highWaterSensor() [L160] int tmp ; [L163] COND FALSE !(! pumpRunning) [L178] FCALL processEnvironment__wrappee__base() [L199] RET processEnvironment__wrappee__highWaterSensor() [L140] RET processEnvironment() [L146] CALL __utac_acc__Specification4_spec__1() [L895] int tmp ; [L896] int tmp___0 ; [L900] CALL, EXPR getWaterLevel() [L505] int retValue_acc ; [L508] retValue_acc = waterLevel [L509] return (retValue_acc); [L900] RET, EXPR getWaterLevel() [L900] tmp = getWaterLevel() [L902] COND TRUE tmp == 0 [L904] CALL, EXPR isPumpRunning() [L238] int retValue_acc ; [L241] retValue_acc = pumpRunning [L242] return (retValue_acc); [L904] RET, EXPR isPumpRunning() [L904] tmp___0 = isPumpRunning() [L906] COND TRUE \read(tmp___0) [L908] CALL __automaton_fail() [L329] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 40 procedures, 235 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 51.0s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 42.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1504 SDtfs, 4060 SDslu, 1842 SDs, 0 SdLazy, 10940 SolverSat, 2957 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 547 GetRequests, 356 SyntacticMatches, 7 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 17.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2303occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 11 MinimizatonAttempts, 1506 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 1204 NumberOfCodeBlocks, 1204 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1005 ConstructedInterpolants, 0 QuantifiedInterpolants, 359743 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 134/153 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...