/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=WIDEST --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_spec1_product41.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:56:27,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:56:27,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:56:27,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:56:27,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:56:27,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:56:27,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:56:27,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:56:27,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:56:27,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:56:27,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:56:27,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:56:27,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:56:27,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:56:27,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:56:27,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:56:27,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:56:27,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:56:27,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:56:27,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:56:27,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:56:27,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:56:27,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:56:27,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:56:27,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:56:27,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:56:27,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:56:27,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:56:27,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:56:27,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 21:56:27,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:56:27,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:56:27,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:56:27,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:56:27,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:56:27,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:56:27,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:56:27,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:56:27,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:56:27,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:56:27,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:56:27,377 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:56:27,403 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:56:27,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:56:27,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:56:27,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:56:27,405 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:56:27,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:56:27,406 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:56:27,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:56:27,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:56:27,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:56:27,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:56:27,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:56:27,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:56:27,407 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:56:27,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:56:27,407 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:56:27,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:56:27,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:56:27,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:56:27,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:56:27,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:56:27,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:56:27,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:56:27,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:56:27,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:56:27,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:56:27,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:56:27,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:56:27,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:56:27,410 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=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 21:56:27,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:56:27,715 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:56:27,720 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:56:27,722 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:56:27,723 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:56:27,723 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product41.cil.c [2020-08-21 21:56:27,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/addcdcf9b/790e1cbee29d4dee94b9c3436e5b41fb/FLAG0921bd9a0 [2020-08-21 21:56:28,384 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:56:28,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product41.cil.c [2020-08-21 21:56:28,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/addcdcf9b/790e1cbee29d4dee94b9c3436e5b41fb/FLAG0921bd9a0 [2020-08-21 21:56:28,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/addcdcf9b/790e1cbee29d4dee94b9c3436e5b41fb [2020-08-21 21:56:28,723 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:56:28,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:56:28,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:56:28,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:56:28,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:56:28,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:56:28" (1/1) ... [2020-08-21 21:56:28,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@531a9e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:56:28, skipping insertion in model container [2020-08-21 21:56:28,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:56:28" (1/1) ... [2020-08-21 21:56:28,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:56:28,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:56:29,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:56:29,225 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:56:29,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:56:29,347 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:56:29,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:56:29 WrapperNode [2020-08-21 21:56:29,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:56:29,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:56:29,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:56:29,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:56:29,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:56:29" (1/1) ... [2020-08-21 21:56:29,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:56:29" (1/1) ... [2020-08-21 21:56:29,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:56:29" (1/1) ... [2020-08-21 21:56:29,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:56:29" (1/1) ... [2020-08-21 21:56:29,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:56:29" (1/1) ... [2020-08-21 21:56:29,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:56:29" (1/1) ... [2020-08-21 21:56:29,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:56:29" (1/1) ... [2020-08-21 21:56:29,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:56:29,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:56:29,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:56:29,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:56:29,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:56:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:56:29,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:56:29,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:56:29,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 21:56:29,500 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 21:56:29,500 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 21:56:29,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 21:56:29,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 21:56:29,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 21:56:29,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 21:56:29,501 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 21:56:29,501 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 21:56:29,502 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 21:56:29,502 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 21:56:29,502 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 21:56:29,502 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 21:56:29,502 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 21:56:29,502 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 21:56:29,503 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 21:56:29,503 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 21:56:29,503 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 21:56:29,503 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2020-08-21 21:56:29,503 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 21:56:29,503 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 21:56:29,504 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 21:56:29,504 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 21:56:29,504 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 21:56:29,504 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 21:56:29,504 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 21:56:29,504 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 21:56:29,505 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 21:56:29,505 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 21:56:29,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:56:29,505 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 21:56:29,505 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 21:56:29,505 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 21:56:29,506 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 21:56:29,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 21:56:29,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-21 21:56:29,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:56:29,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:56:29,506 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 21:56:29,507 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 21:56:29,507 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 21:56:29,507 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 21:56:29,507 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 21:56:29,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 21:56:29,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 21:56:29,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 21:56:29,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 21:56:29,508 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 21:56:29,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 21:56:29,508 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 21:56:29,508 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 21:56:29,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 21:56:29,508 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 21:56:29,509 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 21:56:29,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 21:56:29,509 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 21:56:29,509 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 21:56:29,509 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 21:56:29,509 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 21:56:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 21:56:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 21:56:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 21:56:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 21:56:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 21:56:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 21:56:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 21:56:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 21:56:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 21:56:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 21:56:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 21:56:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-21 21:56:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 21:56:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 21:56:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 21:56:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2020-08-21 21:56:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 21:56:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 21:56:29,514 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 21:56:29,514 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 21:56:29,515 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 21:56:29,515 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 21:56:29,515 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 21:56:29,515 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:56:29,515 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 21:56:29,515 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 21:56:29,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:56:29,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 21:56:29,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:56:30,602 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:56:30,602 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 21:56:30,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:56:30 BoogieIcfgContainer [2020-08-21 21:56:30,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:56:30,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:56:30,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:56:30,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:56:30,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:56:28" (1/3) ... [2020-08-21 21:56:30,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd5ce45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:56:30, skipping insertion in model container [2020-08-21 21:56:30,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:56:29" (2/3) ... [2020-08-21 21:56:30,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd5ce45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:56:30, skipping insertion in model container [2020-08-21 21:56:30,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:56:30" (3/3) ... [2020-08-21 21:56:30,616 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product41.cil.c [2020-08-21 21:56:30,627 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:56:30,635 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:56:30,649 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:56:30,676 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:56:30,676 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:56:30,676 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:56:30,676 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:56:30,677 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:56:30,677 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:56:30,677 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:56:30,677 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:56:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-08-21 21:56:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 21:56:30,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:56:30,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:56:30,729 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:56:30,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:56:30,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1904787813, now seen corresponding path program 1 times [2020-08-21 21:56:30,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:56:30,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530103512] [2020-08-21 21:56:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:56:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:31,503 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:56:31,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:56:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:31,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:56:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:31,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:56:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:31,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:56:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:31,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:56:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:31,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 21:56:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:31,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 21:56:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:56:31,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530103512] [2020-08-21 21:56:31,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:56:31,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:56:31,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844177523] [2020-08-21 21:56:31,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:56:31,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:56:31,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:56:31,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:56:31,610 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 3 states. [2020-08-21 21:56:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:56:32,686 INFO L93 Difference]: Finished difference Result 275 states and 361 transitions. [2020-08-21 21:56:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:56:32,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 21:56:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:56:32,703 INFO L225 Difference]: With dead ends: 275 [2020-08-21 21:56:32,703 INFO L226 Difference]: Without dead ends: 149 [2020-08-21 21:56:32,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:56:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-21 21:56:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2020-08-21 21:56:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-21 21:56:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2020-08-21 21:56:32,845 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 46 [2020-08-21 21:56:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:56:32,845 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2020-08-21 21:56:32,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:56:32,846 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2020-08-21 21:56:32,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 21:56:32,851 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:56:32,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:56:32,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:56:32,852 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:56:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:56:32,852 INFO L82 PathProgramCache]: Analyzing trace with hash -8679295, now seen corresponding path program 1 times [2020-08-21 21:56:32,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:56:32,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595736446] [2020-08-21 21:56:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:56:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:33,214 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:56:33,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:56:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:33,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:56:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:33,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:56:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:33,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:56:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:33,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:56:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:33,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 21:56:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:33,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 21:56:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:56:33,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595736446] [2020-08-21 21:56:33,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:56:33,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:56:33,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245911062] [2020-08-21 21:56:33,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:56:33,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:56:33,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:56:33,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:56:33,279 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand 4 states. [2020-08-21 21:56:33,708 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:56:34,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:56:34,387 INFO L93 Difference]: Finished difference Result 208 states and 252 transitions. [2020-08-21 21:56:34,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:56:34,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 21:56:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:56:34,392 INFO L225 Difference]: With dead ends: 208 [2020-08-21 21:56:34,392 INFO L226 Difference]: Without dead ends: 133 [2020-08-21 21:56:34,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:56:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-21 21:56:34,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2020-08-21 21:56:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-21 21:56:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2020-08-21 21:56:34,428 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 47 [2020-08-21 21:56:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:56:34,428 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2020-08-21 21:56:34,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:56:34,429 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2020-08-21 21:56:34,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 21:56:34,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:56:34,431 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] [2020-08-21 21:56:34,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:56:34,431 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:56:34,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:56:34,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1364944070, now seen corresponding path program 1 times [2020-08-21 21:56:34,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:56:34,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269684054] [2020-08-21 21:56:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:56:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:34,772 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:56:34,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:56:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:34,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:56:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:34,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:56:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:34,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:56:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:34,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:56:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:34,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:56:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:34,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 21:56:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:56:34,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269684054] [2020-08-21 21:56:34,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:56:34,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:56:34,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805720873] [2020-08-21 21:56:34,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:56:34,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:56:34,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:56:34,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:56:34,874 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand 8 states. [2020-08-21 21:56:35,188 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:56:35,483 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:56:35,736 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:56:35,990 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:56:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:56:37,032 INFO L93 Difference]: Finished difference Result 217 states and 266 transitions. [2020-08-21 21:56:37,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:56:37,036 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-21 21:56:37,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:56:37,039 INFO L225 Difference]: With dead ends: 217 [2020-08-21 21:56:37,039 INFO L226 Difference]: Without dead ends: 133 [2020-08-21 21:56:37,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:56:37,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-21 21:56:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2020-08-21 21:56:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-21 21:56:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2020-08-21 21:56:37,070 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 51 [2020-08-21 21:56:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:56:37,071 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2020-08-21 21:56:37,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:56:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2020-08-21 21:56:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 21:56:37,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:56:37,073 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] [2020-08-21 21:56:37,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:56:37,074 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:56:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:56:37,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1317252167, now seen corresponding path program 1 times [2020-08-21 21:56:37,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:56:37,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869649707] [2020-08-21 21:56:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:56:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:37,337 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:56:37,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:56:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:37,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:56:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:37,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:56:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:37,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:56:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:37,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:56:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:37,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 21:56:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:37,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:56:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:37,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 21:56:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:37,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 21:56:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:56:37,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869649707] [2020-08-21 21:56:37,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:56:37,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:56:37,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799051472] [2020-08-21 21:56:37,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:56:37,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:56:37,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:56:37,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:56:37,419 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 6 states. [2020-08-21 21:56:37,718 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:56:38,765 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:56:39,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:56:39,296 INFO L93 Difference]: Finished difference Result 300 states and 370 transitions. [2020-08-21 21:56:39,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:56:39,297 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-08-21 21:56:39,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:56:39,300 INFO L225 Difference]: With dead ends: 300 [2020-08-21 21:56:39,300 INFO L226 Difference]: Without dead ends: 216 [2020-08-21 21:56:39,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:56:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-21 21:56:39,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 175. [2020-08-21 21:56:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-08-21 21:56:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2020-08-21 21:56:39,344 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 59 [2020-08-21 21:56:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:56:39,344 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2020-08-21 21:56:39,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:56:39,345 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2020-08-21 21:56:39,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 21:56:39,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:56:39,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:56:39,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:56:39,347 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:56:39,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:56:39,347 INFO L82 PathProgramCache]: Analyzing trace with hash 19293366, now seen corresponding path program 1 times [2020-08-21 21:56:39,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:56:39,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346434468] [2020-08-21 21:56:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:56:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:39,624 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:56:39,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:56:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:39,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:56:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:39,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:56:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:39,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:56:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:39,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:56:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:39,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 21:56:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:39,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:56:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:39,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:56:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:39,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:56:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:39,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 21:56:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:39,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 21:56:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:56:39,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346434468] [2020-08-21 21:56:39,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:56:39,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:56:39,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639783766] [2020-08-21 21:56:39,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:56:39,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:56:39,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:56:39,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:56:39,726 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand 8 states. [2020-08-21 21:56:40,070 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:56:40,943 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:56:41,262 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:56:41,750 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:56:41,984 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:56:42,250 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:56:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:56:42,895 INFO L93 Difference]: Finished difference Result 520 states and 648 transitions. [2020-08-21 21:56:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 21:56:42,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-08-21 21:56:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:56:42,900 INFO L225 Difference]: With dead ends: 520 [2020-08-21 21:56:42,900 INFO L226 Difference]: Without dead ends: 369 [2020-08-21 21:56:42,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:56:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-08-21 21:56:42,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 305. [2020-08-21 21:56:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-08-21 21:56:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 352 transitions. [2020-08-21 21:56:42,975 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 352 transitions. Word has length 73 [2020-08-21 21:56:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:56:42,975 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 352 transitions. [2020-08-21 21:56:42,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:56:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 352 transitions. [2020-08-21 21:56:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 21:56:42,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:56:42,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:56:42,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:56:42,978 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:56:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:56:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash -989642822, now seen corresponding path program 1 times [2020-08-21 21:56:42,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:56:42,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885172231] [2020-08-21 21:56:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:56:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:43,300 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:56:43,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:56:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:43,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:56:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:43,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:56:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:43,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:56:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:43,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:56:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:43,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 21:56:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:43,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 21:56:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:43,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:56:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:43,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:56:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:43,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:56:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:43,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 21:56:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:43,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 21:56:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:56:43,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885172231] [2020-08-21 21:56:43,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:56:43,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 21:56:43,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039182091] [2020-08-21 21:56:43,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:56:43,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:56:43,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:56:43,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:56:43,431 INFO L87 Difference]: Start difference. First operand 305 states and 352 transitions. Second operand 9 states. [2020-08-21 21:56:43,753 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:56:44,734 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:56:44,980 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:56:45,709 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:56:45,964 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:56:46,210 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:56:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:56:46,346 INFO L93 Difference]: Finished difference Result 408 states and 516 transitions. [2020-08-21 21:56:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 21:56:46,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-08-21 21:56:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:56:46,354 INFO L225 Difference]: With dead ends: 408 [2020-08-21 21:56:46,354 INFO L226 Difference]: Without dead ends: 405 [2020-08-21 21:56:46,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-21 21:56:46,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-08-21 21:56:46,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 305. [2020-08-21 21:56:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-08-21 21:56:46,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 351 transitions. [2020-08-21 21:56:46,419 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 351 transitions. Word has length 77 [2020-08-21 21:56:46,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:56:46,420 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 351 transitions. [2020-08-21 21:56:46,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:56:46,420 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 351 transitions. [2020-08-21 21:56:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 21:56:46,423 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:56:46,423 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:56:46,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:56:46,423 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:56:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:56:46,424 INFO L82 PathProgramCache]: Analyzing trace with hash 636453553, now seen corresponding path program 1 times [2020-08-21 21:56:46,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:56:46,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863562401] [2020-08-21 21:56:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:56:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,689 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:56:46,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:56:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:56:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:56:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:56:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:56:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 21:56:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 21:56:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:56:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:56:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:56:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:56:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:56:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:56:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 21:56:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 21:56:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 21:56:46,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863562401] [2020-08-21 21:56:46,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:56:46,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 21:56:46,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114384082] [2020-08-21 21:56:46,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:56:46,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:56:46,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:56:46,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:56:46,873 INFO L87 Difference]: Start difference. First operand 305 states and 351 transitions. Second operand 9 states. [2020-08-21 21:56:47,918 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:56:48,151 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 21:56:48,390 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:56:48,620 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:56:49,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:56:49,506 INFO L93 Difference]: Finished difference Result 694 states and 873 transitions. [2020-08-21 21:56:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 21:56:49,508 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-08-21 21:56:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:56:49,511 INFO L225 Difference]: With dead ends: 694 [2020-08-21 21:56:49,511 INFO L226 Difference]: Without dead ends: 413 [2020-08-21 21:56:49,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:56:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-08-21 21:56:49,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 315. [2020-08-21 21:56:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-08-21 21:56:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 361 transitions. [2020-08-21 21:56:49,576 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 361 transitions. Word has length 93 [2020-08-21 21:56:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:56:49,577 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 361 transitions. [2020-08-21 21:56:49,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:56:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 361 transitions. [2020-08-21 21:56:49,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 21:56:49,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:56:49,579 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:56:49,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:56:49,580 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:56:49,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:56:49,580 INFO L82 PathProgramCache]: Analyzing trace with hash -260939725, now seen corresponding path program 1 times [2020-08-21 21:56:49,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:56:49,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695757328] [2020-08-21 21:56:49,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:56:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,828 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:56:49,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:56:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:56:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:56:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:56:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:56:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 21:56:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 21:56:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:56:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:56:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:56:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:56:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:56:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:56:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 21:56:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 21:56:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 21:56:49,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695757328] [2020-08-21 21:56:49,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:56:49,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 21:56:49,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288836211] [2020-08-21 21:56:49,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 21:56:49,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:56:49,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 21:56:49,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:56:49,974 INFO L87 Difference]: Start difference. First operand 315 states and 361 transitions. Second operand 11 states. [2020-08-21 21:56:50,656 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:56:50,911 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:56:51,133 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:56:51,689 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:56:51,926 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:56:52,153 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:56:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:56:53,116 INFO L93 Difference]: Finished difference Result 714 states and 895 transitions. [2020-08-21 21:56:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 21:56:53,117 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-08-21 21:56:53,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:56:53,121 INFO L225 Difference]: With dead ends: 714 [2020-08-21 21:56:53,121 INFO L226 Difference]: Without dead ends: 423 [2020-08-21 21:56:53,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 21:56:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-08-21 21:56:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 323. [2020-08-21 21:56:53,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-21 21:56:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 369 transitions. [2020-08-21 21:56:53,183 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 369 transitions. Word has length 93 [2020-08-21 21:56:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:56:53,183 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 369 transitions. [2020-08-21 21:56:53,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 21:56:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 369 transitions. [2020-08-21 21:56:53,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 21:56:53,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:56:53,186 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:56:53,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:56:53,186 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:56:53,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:56:53,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1709999732, now seen corresponding path program 1 times [2020-08-21 21:56:53,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:56:53,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144197621] [2020-08-21 21:56:53,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:56:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,430 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:56:53,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:56:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:56:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:56:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:56:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:56:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 21:56:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 21:56:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:56:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:56:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:56:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:56:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:56:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:56:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 21:56:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 21:56:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 21:56:53,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144197621] [2020-08-21 21:56:53,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:56:53,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 21:56:53,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915535157] [2020-08-21 21:56:53,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:56:53,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:56:53,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:56:53,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:56:53,569 INFO L87 Difference]: Start difference. First operand 323 states and 369 transitions. Second operand 7 states. [2020-08-21 21:56:53,873 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:56:54,373 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:56:55,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:56:55,859 INFO L93 Difference]: Finished difference Result 997 states and 1285 transitions. [2020-08-21 21:56:55,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 21:56:55,859 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-21 21:56:55,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:56:55,867 INFO L225 Difference]: With dead ends: 997 [2020-08-21 21:56:55,867 INFO L226 Difference]: Without dead ends: 698 [2020-08-21 21:56:55,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:56:55,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-21 21:56:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 599. [2020-08-21 21:56:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-08-21 21:56:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 711 transitions. [2020-08-21 21:56:55,996 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 711 transitions. Word has length 93 [2020-08-21 21:56:55,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:56:55,996 INFO L479 AbstractCegarLoop]: Abstraction has 599 states and 711 transitions. [2020-08-21 21:56:55,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:56:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 711 transitions. [2020-08-21 21:56:56,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 21:56:56,004 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:56:56,004 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:56:56,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:56:56,005 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:56:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:56:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1136093798, now seen corresponding path program 1 times [2020-08-21 21:56:56,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:56:56,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715816980] [2020-08-21 21:56:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:56:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,346 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:56:56,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:56:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:56:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:56:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:56:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:56:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 21:56:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 21:56:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 21:56:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:56:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:56:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:56:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:56:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:56:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:56:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-21 21:56:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 21:56:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:56:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:56:56,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715816980] [2020-08-21 21:56:56,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:56:56,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 21:56:56,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842444281] [2020-08-21 21:56:56,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 21:56:56,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:56:56,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 21:56:56,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-21 21:56:56,726 INFO L87 Difference]: Start difference. First operand 599 states and 711 transitions. Second operand 17 states. [2020-08-21 21:56:57,514 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:56:57,827 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:56:58,088 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:56:58,326 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:56:58,953 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:56:59,918 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:57:00,245 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:57:00,549 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:57:00,816 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:57:01,177 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:57:01,457 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:57:02,048 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 188 [2020-08-21 21:57:02,631 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 188 [2020-08-21 21:57:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:57:04,035 INFO L93 Difference]: Finished difference Result 1238 states and 1532 transitions. [2020-08-21 21:57:04,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 21:57:04,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-08-21 21:57:04,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:57:04,041 INFO L225 Difference]: With dead ends: 1238 [2020-08-21 21:57:04,042 INFO L226 Difference]: Without dead ends: 663 [2020-08-21 21:57:04,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 21:57:04,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2020-08-21 21:57:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 567. [2020-08-21 21:57:04,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-08-21 21:57:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 660 transitions. [2020-08-21 21:57:04,139 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 660 transitions. Word has length 97 [2020-08-21 21:57:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:57:04,140 INFO L479 AbstractCegarLoop]: Abstraction has 567 states and 660 transitions. [2020-08-21 21:57:04,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 21:57:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 660 transitions. [2020-08-21 21:57:04,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-21 21:57:04,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:57:04,143 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-08-21 21:57:04,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:57:04,143 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:57:04,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:57:04,144 INFO L82 PathProgramCache]: Analyzing trace with hash 773081915, now seen corresponding path program 1 times [2020-08-21 21:57:04,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:57:04,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14999369] [2020-08-21 21:57:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:57:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 21:57:04,203 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 21:57:04,203 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:57:04,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:57:04,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:57:04 BoogieIcfgContainer [2020-08-21 21:57:04,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:57:04,237 INFO L168 Benchmark]: Toolchain (without parser) took 35512.86 ms. Allocated memory was 139.5 MB in the beginning and 663.7 MB in the end (delta: 524.3 MB). Free memory was 100.3 MB in the beginning and 117.0 MB in the end (delta: -16.8 MB). Peak memory consumption was 507.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:57:04,238 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 21:57:04,239 INFO L168 Benchmark]: CACSL2BoogieTranslator took 622.17 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 100.1 MB in the beginning and 169.6 MB in the end (delta: -69.5 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:57:04,239 INFO L168 Benchmark]: Boogie Preprocessor took 86.43 ms. Allocated memory is still 202.9 MB. Free memory was 169.6 MB in the beginning and 165.0 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB. [2020-08-21 21:57:04,240 INFO L168 Benchmark]: RCFGBuilder took 1172.21 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 165.0 MB in the beginning and 196.7 MB in the end (delta: -31.7 MB). Peak memory consumption was 82.1 MB. Max. memory is 7.1 GB. [2020-08-21 21:57:04,241 INFO L168 Benchmark]: TraceAbstraction took 33627.04 ms. Allocated memory was 235.9 MB in the beginning and 663.7 MB in the end (delta: 427.8 MB). Free memory was 195.3 MB in the beginning and 117.0 MB in the end (delta: 78.2 MB). Peak memory consumption was 506.1 MB. Max. memory is 7.1 GB. [2020-08-21 21:57:04,245 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 622.17 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 100.1 MB in the beginning and 169.6 MB in the end (delta: -69.5 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 86.43 ms. Allocated memory is still 202.9 MB. Free memory was 169.6 MB in the beginning and 165.0 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1172.21 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 165.0 MB in the beginning and 196.7 MB in the end (delta: -31.7 MB). Peak memory consumption was 82.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 33627.04 ms. Allocated memory was 235.9 MB in the beginning and 663.7 MB in the end (delta: 427.8 MB). Free memory was 195.3 MB in the beginning and 117.0 MB in the end (delta: 78.2 MB). Peak memory consumption was 506.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 887]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L209] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L480] int waterLevel = 1; [L481] int methaneLevelCritical = 0; [L578] int pumpRunning = 0; [L579] int systemActive = 1; [L749] int cleanupTimeShifts = 4; [L825] int retValue_acc ; [L826] int tmp ; [L830] FCALL select_helpers() [L831] FCALL select_features() [L832] CALL, EXPR valid_product() [L874] int retValue_acc ; [L877] retValue_acc = 1 [L878] return (retValue_acc); [L832] RET, EXPR valid_product() [L832] tmp = valid_product() [L834] COND TRUE \read(tmp) [L836] FCALL setup() [L837] CALL runTest() [L816] CALL test() [L411] int splverifierCounter ; [L412] int tmp ; [L413] int tmp___0 ; [L414] int tmp___1 ; [L415] int tmp___2 ; [L418] splverifierCounter = 0 [L420] COND TRUE 1 [L422] COND TRUE splverifierCounter < 4 [L428] tmp = __VERIFIER_nondet_int() [L430] COND TRUE \read(tmp) [L432] CALL waterRise() [L498] COND TRUE waterLevel < 2 [L499] waterLevel = waterLevel + 1 [L432] RET waterRise() [L438] tmp___0 = __VERIFIER_nondet_int() [L440] COND FALSE !(\read(tmp___0)) [L448] tmp___2 = __VERIFIER_nondet_int() [L450] COND TRUE \read(tmp___2) [L463] CALL timeShift() [L586] COND FALSE !(\read(pumpRunning)) [L593] COND TRUE \read(systemActive) [L595] CALL processEnvironment() [L615] int tmp ; [L618] COND TRUE ! pumpRunning [L620] CALL, EXPR isHighWaterLevel() [L730] int retValue_acc ; [L731] int tmp ; [L732] int tmp___0 ; [L736] CALL, EXPR isHighWaterSensorDry() [L560] int retValue_acc ; [L563] COND FALSE !(waterLevel < 2) [L567] retValue_acc = 0 [L568] return (retValue_acc); [L736] RET, EXPR isHighWaterSensorDry() [L736] tmp = isHighWaterSensorDry() [L738] COND FALSE !(\read(tmp)) [L741] tmp___0 = 1 [L743] retValue_acc = tmp___0 [L744] return (retValue_acc); [L620] RET, EXPR isHighWaterLevel() [L620] tmp = isHighWaterLevel() [L622] COND TRUE \read(tmp) [L624] CALL activatePump() [L649] int tmp ; [L653] CALL, EXPR isMethaneAlarm() [L674] int retValue_acc ; [L678] CALL, EXPR isMethaneLevelCritical() [L519] int retValue_acc ; [L522] retValue_acc = methaneLevelCritical [L523] return (retValue_acc); [L678] RET, EXPR isMethaneLevelCritical() [L678] retValue_acc = isMethaneLevelCritical() [L680] return (retValue_acc); [L653] RET, EXPR isMethaneAlarm() [L653] tmp = isMethaneAlarm() [L655] COND FALSE !(\read(tmp)) [L659] CALL activatePump__wrappee__highWaterSensor() [L643] pumpRunning = 1 [L659] RET activatePump__wrappee__highWaterSensor() [L624] RET activatePump() [L595] RET processEnvironment() [L601] CALL __utac_acc__Specification1_spec__1() [L893] int tmp ; [L894] int tmp___0 ; [L898] CALL, EXPR isMethaneLevelCritical() [L519] int retValue_acc ; [L522] retValue_acc = methaneLevelCritical [L523] return (retValue_acc); [L898] RET, EXPR isMethaneLevelCritical() [L898] tmp = isMethaneLevelCritical() [L900] COND FALSE !(\read(tmp)) [L601] RET __utac_acc__Specification1_spec__1() [L463] RET timeShift() [L420] COND TRUE 1 [L422] COND TRUE splverifierCounter < 4 [L428] tmp = __VERIFIER_nondet_int() [L430] COND FALSE !(\read(tmp)) [L438] tmp___0 = __VERIFIER_nondet_int() [L440] COND TRUE \read(tmp___0) [L442] CALL changeMethaneLevel() [L510] COND FALSE !(\read(methaneLevelCritical)) [L513] methaneLevelCritical = 1 [L442] RET changeMethaneLevel() [L448] tmp___2 = __VERIFIER_nondet_int() [L450] COND TRUE \read(tmp___2) [L463] CALL timeShift() [L586] COND TRUE \read(pumpRunning) [L588] CALL lowerWaterLevel() [L486] COND TRUE waterLevel > 0 [L487] waterLevel = waterLevel - 1 [L588] RET lowerWaterLevel() [L593] COND TRUE \read(systemActive) [L595] CALL processEnvironment() [L615] int tmp ; [L618] COND FALSE !(! pumpRunning) [L633] FCALL processEnvironment__wrappee__base() [L595] RET processEnvironment() [L601] CALL __utac_acc__Specification1_spec__1() [L893] int tmp ; [L894] int tmp___0 ; [L898] CALL, EXPR isMethaneLevelCritical() [L519] int retValue_acc ; [L522] retValue_acc = methaneLevelCritical [L523] return (retValue_acc); [L898] RET, EXPR isMethaneLevelCritical() [L898] tmp = isMethaneLevelCritical() [L900] COND TRUE \read(tmp) [L902] CALL, EXPR isPumpRunning() [L685] int retValue_acc ; [L688] retValue_acc = pumpRunning [L689] return (retValue_acc); [L902] RET, EXPR isPumpRunning() [L902] tmp___0 = isPumpRunning() [L904] COND TRUE \read(tmp___0) [L906] CALL __automaton_fail() [L887] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 38 procedures, 222 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 33.5s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 27.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1132 SDtfs, 2290 SDslu, 1323 SDs, 0 SdLazy, 6349 SolverSat, 1428 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 391 GetRequests, 259 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 13.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=599occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 10 MinimizatonAttempts, 680 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 719 ConstructedInterpolants, 0 QuantifiedInterpolants, 229226 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 9 PerfectInterpolantSequences, 10/12 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...