/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec3_product40.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:03:55,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:03:55,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:03:55,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-22 01:03:55,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-22 01:03:55,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-22 01:03:55,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-22 01:03:55,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-22 01:03:55,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-22 01:03:55,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-22 01:03:55,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-22 01:03:55,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-22 01:03:55,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:03:55,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:03:55,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:03:55,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:03:55,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:03:55,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:03:55,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:03:55,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:03:55,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:03:55,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:03:55,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:03:55,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:03:55,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-22 01:03:55,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-22 01:03:55,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-22 01:03:55,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-22 01:03:55,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-22 01:03:55,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-22 01:03:55,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-22 01:03:55,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-22 01:03:55,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-22 01:03:55,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-22 01:03:55,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-22 01:03:55,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-22 01:03:55,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-22 01:03:55,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-22 01:03:55,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 01:03:55,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 01:03:55,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 01:03:55,837 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:03:55,867 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:03:55,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:03:55,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:03:55,872 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:03:55,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:03:55,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:03:55,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:03:55,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:03:55,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:03:55,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:03:55,875 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:03:55,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:03:55,875 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:03:55,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:03:55,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:03:55,876 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:03:55,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:03:55,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:03:55,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:03:55,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:03:55,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:03:55,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:03:55,877 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:03:55,877 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:03:56,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:03:56,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:03:56,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:03:56,293 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:03:56,294 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:03:56,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product40.cil.c [2021-02-22 01:03:56,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a691c4e84/029a740b4b1f4c09a324f68c9f6783a4/FLAG8d3509664 [2021-02-22 01:03:57,122 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:03:57,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec3_product40.cil.c [2021-02-22 01:03:57,137 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a691c4e84/029a740b4b1f4c09a324f68c9f6783a4/FLAG8d3509664 [2021-02-22 01:03:57,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a691c4e84/029a740b4b1f4c09a324f68c9f6783a4 [2021-02-22 01:03:57,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:03:57,461 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:03:57,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:03:57,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:03:57,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:03:57,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:03:57" (1/1) ... [2021-02-22 01:03:57,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1468998f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:03:57, skipping insertion in model container [2021-02-22 01:03:57,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:03:57" (1/1) ... [2021-02-22 01:03:57,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:03:57,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:03:57,855 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec3_product40.cil.c[3612,3625] [2021-02-22 01:03:57,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:03:57,955 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:03:57,980 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec3_product40.cil.c[3612,3625] [2021-02-22 01:03:58,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:03:58,087 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:03:58,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:03:58 WrapperNode [2021-02-22 01:03:58,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:03:58,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:03:58,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:03:58,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:03:58,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:03:58" (1/1) ... [2021-02-22 01:03:58,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:03:58" (1/1) ... [2021-02-22 01:03:58,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:03:58" (1/1) ... [2021-02-22 01:03:58,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:03:58" (1/1) ... [2021-02-22 01:03:58,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:03:58" (1/1) ... [2021-02-22 01:03:58,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:03:58" (1/1) ... [2021-02-22 01:03:58,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:03:58" (1/1) ... [2021-02-22 01:03:58,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:03:58,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:03:58,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:03:58,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:03:58,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:03:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-02-22 01:03:58,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:03:58,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:03:58,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2021-02-22 01:03:58,363 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:03:58,363 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-02-22 01:03:58,363 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2021-02-22 01:03:58,363 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2021-02-22 01:03:58,364 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2021-02-22 01:03:58,364 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:03:58,364 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-02-22 01:03:58,364 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2021-02-22 01:03:58,364 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2021-02-22 01:03:58,364 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2021-02-22 01:03:58,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2021-02-22 01:03:58,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-02-22 01:03:58,365 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2021-02-22 01:03:58,365 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2021-02-22 01:03:58,365 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2021-02-22 01:03:58,366 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2021-02-22 01:03:58,366 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2021-02-22 01:03:58,366 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2021-02-22 01:03:58,366 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2021-02-22 01:03:58,366 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-02-22 01:03:58,366 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2021-02-22 01:03:58,367 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2021-02-22 01:03:58,367 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2021-02-22 01:03:58,367 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2021-02-22 01:03:58,367 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2021-02-22 01:03:58,367 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2021-02-22 01:03:58,367 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2021-02-22 01:03:58,368 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2021-02-22 01:03:58,368 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2021-02-22 01:03:58,368 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2021-02-22 01:03:58,368 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2021-02-22 01:03:58,368 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2021-02-22 01:03:58,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2021-02-22 01:03:58,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2021-02-22 01:03:58,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2021-02-22 01:03:58,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2021-02-22 01:03:58,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2021-02-22 01:03:58,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2021-02-22 01:03:58,369 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:03:58,369 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:03:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:03:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:03:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 01:03:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2021-02-22 01:03:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-02-22 01:03:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-02-22 01:03:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2021-02-22 01:03:58,371 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2021-02-22 01:03:58,371 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2021-02-22 01:03:58,371 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2021-02-22 01:03:58,371 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2021-02-22 01:03:58,371 INFO L130 BoogieDeclarations]: Found specification of procedure test [2021-02-22 01:03:58,371 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2021-02-22 01:03:58,371 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2021-02-22 01:03:58,372 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2021-02-22 01:03:58,372 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2021-02-22 01:03:58,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:03:58,372 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-02-22 01:03:58,372 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-02-22 01:03:58,372 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2021-02-22 01:03:58,373 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2021-02-22 01:03:58,373 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2021-02-22 01:03:58,373 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2021-02-22 01:03:58,373 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2021-02-22 01:03:58,373 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2021-02-22 01:03:58,373 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2021-02-22 01:03:58,373 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2021-02-22 01:03:58,374 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2021-02-22 01:03:58,374 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2021-02-22 01:03:58,374 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2021-02-22 01:03:58,374 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2021-02-22 01:03:58,374 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2021-02-22 01:03:58,374 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2021-02-22 01:03:58,375 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2021-02-22 01:03:58,375 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2021-02-22 01:03:58,375 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-22 01:03:58,375 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-22 01:03:58,375 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2021-02-22 01:03:58,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-22 01:03:58,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-22 01:03:58,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:03:58,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-22 01:03:58,376 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2021-02-22 01:03:58,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:03:58,376 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2021-02-22 01:03:58,376 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2021-02-22 01:03:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:03:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2021-02-22 01:03:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2021-02-22 01:03:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2021-02-22 01:03:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:03:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:03:58,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:04:00,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:04:00,122 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-02-22 01:04:00,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:04:00 BoogieIcfgContainer [2021-02-22 01:04:00,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:04:00,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:04:00,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:04:00,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:04:00,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:03:57" (1/3) ... [2021-02-22 01:04:00,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4e3972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:04:00, skipping insertion in model container [2021-02-22 01:04:00,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:03:58" (2/3) ... [2021-02-22 01:04:00,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4e3972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:04:00, skipping insertion in model container [2021-02-22 01:04:00,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:04:00" (3/3) ... [2021-02-22 01:04:00,135 INFO L111 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product40.cil.c [2021-02-22 01:04:00,143 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:04:00,149 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:04:00,170 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:04:00,196 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:04:00,197 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:04:00,197 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:04:00,197 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:04:00,197 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:04:00,197 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:04:00,198 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:04:00,198 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:04:00,225 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states. [2021-02-22 01:04:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-02-22 01:04:00,247 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:04:00,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:04:00,249 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:04:00,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:04:00,256 INFO L82 PathProgramCache]: Analyzing trace with hash 2090364852, now seen corresponding path program 1 times [2021-02-22 01:04:00,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:04:00,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843036507] [2021-02-22 01:04:00,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:04:00,353 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:04:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:00,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:00,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:00,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:00,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:01,406 WARN L202 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2021-02-22 01:04:01,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:04:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:01,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:01,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:01,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-02-22 01:04:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:01,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:01,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:01,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-22 01:04:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:01,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:01,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:01,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-22 01:04:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:01,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:01,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:01,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-22 01:04:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:01,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:01,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:01,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-02-22 01:04:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:01,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:01,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:01,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-02-22 01:04:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:01,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:01,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:01,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-02-22 01:04:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:01,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:01,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:04:01,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843036507] [2021-02-22 01:04:01,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:04:01,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 01:04:01,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734836865] [2021-02-22 01:04:01,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 01:04:01,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:04:01,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 01:04:01,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 01:04:01,641 INFO L87 Difference]: Start difference. First operand 328 states. Second operand 3 states. [2021-02-22 01:04:03,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:04:03,541 INFO L93 Difference]: Finished difference Result 518 states and 617 transitions. [2021-02-22 01:04:03,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 01:04:03,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2021-02-22 01:04:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:04:03,562 INFO L225 Difference]: With dead ends: 518 [2021-02-22 01:04:03,562 INFO L226 Difference]: Without dead ends: 320 [2021-02-22 01:04:03,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 01:04:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-02-22 01:04:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 276. [2021-02-22 01:04:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2021-02-22 01:04:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 301 transitions. [2021-02-22 01:04:03,754 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 301 transitions. Word has length 158 [2021-02-22 01:04:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:04:03,755 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 301 transitions. [2021-02-22 01:04:03,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 01:04:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 301 transitions. [2021-02-22 01:04:03,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-02-22 01:04:03,762 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:04:03,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:04:03,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:04:03,763 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:04:03,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:04:03,763 INFO L82 PathProgramCache]: Analyzing trace with hash 117416096, now seen corresponding path program 1 times [2021-02-22 01:04:03,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:04:03,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978195527] [2021-02-22 01:04:03,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:04:03,768 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:04:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:03,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:03,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:03,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:03,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:04:03,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:03,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:04,239 WARN L202 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2021-02-22 01:04:04,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:04:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:04,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:04,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:04,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-02-22 01:04:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:04,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:04,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:04,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-22 01:04:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:04,305 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:04,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:04,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-22 01:04:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:04,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:04,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:04,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-22 01:04:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:04,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:04,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:04,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-02-22 01:04:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:04,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:04,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:04,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-02-22 01:04:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:04,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:04,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:04,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-02-22 01:04:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:04,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:04,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:04:04,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978195527] [2021-02-22 01:04:04,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:04:04,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:04:04,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256759553] [2021-02-22 01:04:04,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:04:04,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:04:04,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:04:04,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:04:04,373 INFO L87 Difference]: Start difference. First operand 276 states and 301 transitions. Second operand 4 states. [2021-02-22 01:04:05,153 WARN L202 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2021-02-22 01:04:06,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:04:06,423 INFO L93 Difference]: Finished difference Result 424 states and 479 transitions. [2021-02-22 01:04:06,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-22 01:04:06,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2021-02-22 01:04:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:04:06,429 INFO L225 Difference]: With dead ends: 424 [2021-02-22 01:04:06,429 INFO L226 Difference]: Without dead ends: 303 [2021-02-22 01:04:06,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-22 01:04:06,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-02-22 01:04:06,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 266. [2021-02-22 01:04:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2021-02-22 01:04:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 288 transitions. [2021-02-22 01:04:06,547 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 288 transitions. Word has length 159 [2021-02-22 01:04:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:04:06,547 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 288 transitions. [2021-02-22 01:04:06,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:04:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 288 transitions. [2021-02-22 01:04:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-02-22 01:04:06,551 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:04:06,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:04:06,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:04:06,552 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:04:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:04:06,553 INFO L82 PathProgramCache]: Analyzing trace with hash 222492372, now seen corresponding path program 1 times [2021-02-22 01:04:06,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:04:06,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86367578] [2021-02-22 01:04:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:04:06,556 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:04:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:06,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:06,655 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:06,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:06,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:04:06,660 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:06,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:04:06,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:06,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:06,667 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:06,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:04:06,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:06,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:07,005 WARN L202 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2021-02-22 01:04:07,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:04:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:07,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:07,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:07,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-02-22 01:04:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:07,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:07,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:07,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-22 01:04:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:07,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:07,076 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:07,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-22 01:04:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:07,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:07,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:07,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:07,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:04:07,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:07,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:04:07,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-22 01:04:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:07,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:07,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:07,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-02-22 01:04:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:07,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:07,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:04:07,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-02-22 01:04:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:07,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:07,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:07,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-02-22 01:04:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:07,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:07,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:07,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-02-22 01:04:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:07,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:07,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:04:07,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86367578] [2021-02-22 01:04:07,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:04:07,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-22 01:04:07,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865948024] [2021-02-22 01:04:07,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-22 01:04:07,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:04:07,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-22 01:04:07,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-22 01:04:07,255 INFO L87 Difference]: Start difference. First operand 266 states and 288 transitions. Second operand 10 states. [2021-02-22 01:04:07,955 WARN L202 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-02-22 01:04:08,416 WARN L202 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2021-02-22 01:04:08,815 WARN L202 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2021-02-22 01:04:09,208 WARN L202 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-22 01:04:09,592 WARN L202 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-22 01:04:09,978 WARN L202 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-22 01:04:11,114 WARN L202 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2021-02-22 01:04:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:04:13,998 INFO L93 Difference]: Finished difference Result 734 states and 856 transitions. [2021-02-22 01:04:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-22 01:04:13,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 172 [2021-02-22 01:04:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:04:14,006 INFO L225 Difference]: With dead ends: 734 [2021-02-22 01:04:14,006 INFO L226 Difference]: Without dead ends: 583 [2021-02-22 01:04:14,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-02-22 01:04:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-02-22 01:04:14,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 488. [2021-02-22 01:04:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2021-02-22 01:04:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 547 transitions. [2021-02-22 01:04:14,290 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 547 transitions. Word has length 172 [2021-02-22 01:04:14,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:04:14,292 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 547 transitions. [2021-02-22 01:04:14,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-22 01:04:14,292 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 547 transitions. [2021-02-22 01:04:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-02-22 01:04:14,299 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:04:14,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:04:14,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 01:04:14,301 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:04:14,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:04:14,301 INFO L82 PathProgramCache]: Analyzing trace with hash 569625473, now seen corresponding path program 1 times [2021-02-22 01:04:14,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:04:14,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733937129] [2021-02-22 01:04:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:04:14,308 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:04:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:14,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:04:14,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,465 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:04:14,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:04:14,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:04:14,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:04:14,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:04:14,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:04:14,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:14,791 WARN L202 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2021-02-22 01:04:14,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:04:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:14,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:14,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 01:04:14,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-02-22 01:04:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:14,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:14,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-22 01:04:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:14,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:14,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-22 01:04:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:14,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:14,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-22 01:04:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:14,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:14,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-02-22 01:04:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:14,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:14,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-02-22 01:04:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:14,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:14,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-02-22 01:04:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:14,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:14,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:04:14,900 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:04:14,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-02-22 01:04:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:04:14,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:04:14,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:04:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:04:14,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733937129] [2021-02-22 01:04:14,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:04:14,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-22 01:04:14,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294538174] [2021-02-22 01:04:14,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-22 01:04:14,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:04:14,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-22 01:04:14,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-22 01:04:14,967 INFO L87 Difference]: Start difference. First operand 488 states and 547 transitions. Second operand 9 states. [2021-02-22 01:04:15,582 WARN L202 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-02-22 01:04:17,784 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-22 01:04:18,178 WARN L202 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-22 01:04:18,624 WARN L202 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-22 01:04:19,089 WARN L202 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-02-22 01:04:19,484 WARN L202 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-02-22 01:04:19,885 WARN L202 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-22 01:04:20,281 WARN L202 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-02-22 01:04:21,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:04:21,491 INFO L93 Difference]: Finished difference Result 1316 states and 1590 transitions. [2021-02-22 01:04:21,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-22 01:04:21,492 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 177 [2021-02-22 01:04:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:04:21,500 INFO L225 Difference]: With dead ends: 1316 [2021-02-22 01:04:21,500 INFO L226 Difference]: Without dead ends: 943 [2021-02-22 01:04:21,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-02-22 01:04:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-02-22 01:04:21,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 840. [2021-02-22 01:04:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2021-02-22 01:04:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 966 transitions. [2021-02-22 01:04:21,984 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 966 transitions. Word has length 177 [2021-02-22 01:04:21,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:04:21,985 INFO L480 AbstractCegarLoop]: Abstraction has 840 states and 966 transitions. [2021-02-22 01:04:21,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-22 01:04:21,985 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 966 transitions. [2021-02-22 01:04:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-02-22 01:04:21,992 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:04:21,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:04:21,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 01:04:21,993 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:04:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:04:21,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1181063877, now seen corresponding path program 1 times [2021-02-22 01:04:21,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:04:21,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399023710] [2021-02-22 01:04:21,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:04:21,998 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:04:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:04:22,085 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:04:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:04:22,165 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:04:22,361 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 01:04:22,361 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 01:04:22,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-22 01:04:22,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:04:22 BoogieIcfgContainer [2021-02-22 01:04:22,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:04:22,389 INFO L168 Benchmark]: Toolchain (without parser) took 24940.16 ms. Allocated memory was 151.0 MB in the beginning and 508.6 MB in the end (delta: 357.6 MB). Free memory was 127.5 MB in the beginning and 374.7 MB in the end (delta: -247.1 MB). Peak memory consumption was 111.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:04:22,389 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:04:22,390 INFO L168 Benchmark]: CACSL2BoogieTranslator took 621.07 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 105.1 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:04:22,391 INFO L168 Benchmark]: Boogie Preprocessor took 166.60 ms. Allocated memory is still 151.0 MB. Free memory was 105.1 MB in the beginning and 132.3 MB in the end (delta: -27.2 MB). Peak memory consumption was 6.2 MB. Max. memory is 8.0 GB. [2021-02-22 01:04:22,391 INFO L168 Benchmark]: RCFGBuilder took 1868.50 ms. Allocated memory is still 151.0 MB. Free memory was 132.3 MB in the beginning and 73.8 MB in the end (delta: 58.5 MB). Peak memory consumption was 58.5 MB. Max. memory is 8.0 GB. [2021-02-22 01:04:22,392 INFO L168 Benchmark]: TraceAbstraction took 22260.38 ms. Allocated memory was 151.0 MB in the beginning and 508.6 MB in the end (delta: 357.6 MB). Free memory was 73.3 MB in the beginning and 374.7 MB in the end (delta: -301.4 MB). Peak memory consumption was 56.2 MB. Max. memory is 8.0 GB. [2021-02-22 01:04:22,395 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 621.07 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 105.1 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 166.60 ms. Allocated memory is still 151.0 MB. Free memory was 105.1 MB in the beginning and 132.3 MB in the end (delta: -27.2 MB). Peak memory consumption was 6.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1868.50 ms. Allocated memory is still 151.0 MB. Free memory was 132.3 MB in the beginning and 73.8 MB in the end (delta: 58.5 MB). Peak memory consumption was 58.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 22260.38 ms. Allocated memory was 151.0 MB in the beginning and 508.6 MB in the end (delta: 357.6 MB). Free memory was 73.3 MB in the beginning and 374.7 MB in the end (delta: -301.4 MB). Peak memory consumption was 56.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 223]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int cleanupTimeShifts = 4; [L231] int waterLevel = 1; [L232] int methaneLevelCritical = 0; [L329] int pumpRunning = 0; [L330] int systemActive = 1; [L768] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L123] int retValue_acc ; [L124] int tmp ; [L128] FCALL select_helpers() [L129] FCALL select_features() [L130] CALL, EXPR valid_product() [L172] int retValue_acc ; [L175] retValue_acc = 1 [L176] return (retValue_acc); [L130] RET, EXPR valid_product() [L130] tmp = valid_product() [L132] COND TRUE \read(tmp) [L134] FCALL setup() [L135] CALL runTest() [L114] CALL test() [L531] int splverifierCounter ; [L532] int tmp ; [L533] int tmp___0 ; [L534] int tmp___1 ; [L535] int tmp___2 ; [L538] splverifierCounter = 0 [L540] COND TRUE 1 [L542] COND TRUE splverifierCounter < 4 [L548] tmp = __VERIFIER_nondet_int() [L550] COND TRUE \read(tmp) [L552] CALL waterRise() [L249] COND TRUE waterLevel < 2 [L250] waterLevel = waterLevel + 1 [L552] RET waterRise() [L558] tmp___0 = __VERIFIER_nondet_int() [L560] COND FALSE !(\read(tmp___0)) [L568] tmp___2 = __VERIFIER_nondet_int() [L570] COND FALSE !(\read(tmp___2)) [L576] tmp___1 = __VERIFIER_nondet_int() [L578] COND TRUE \read(tmp___1) [L580] CALL stopSystem() [L510] COND FALSE !(\read(pumpRunning)) [L517] systemActive = 0 [L580] RET stopSystem() [L587] CALL timeShift() [L336] COND FALSE !(\read(pumpRunning)) [L343] COND FALSE !(\read(systemActive)) [L351] CALL __utac_acc__Specification3_spec__1() [L186] int tmp ; [L187] int tmp___0 ; [L188] int tmp___1 ; [L192] CALL, EXPR isMethaneLevelCritical() [L270] int retValue_acc ; [L273] retValue_acc = methaneLevelCritical [L274] return (retValue_acc); [L192] RET, EXPR isMethaneLevelCritical() [L192] tmp = isMethaneLevelCritical() [L194] COND FALSE !(\read(tmp)) [L198] CALL, EXPR getWaterLevel() [L302] int retValue_acc ; [L305] retValue_acc = waterLevel [L306] return (retValue_acc); [L198] RET, EXPR getWaterLevel() [L198] tmp___0 = getWaterLevel() [L200] COND TRUE tmp___0 == 2 [L202] CALL, EXPR isPumpRunning() [L443] int retValue_acc ; [L446] retValue_acc = pumpRunning [L447] return (retValue_acc); [L202] RET, EXPR isPumpRunning() [L202] tmp___1 = isPumpRunning() [L204] COND FALSE !(\read(tmp___1)) [L208] CALL __automaton_fail() [L223] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 643 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 22.1s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 17.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1067 SDtfs, 1628 SDslu, 1611 SDs, 0 SdLazy, 3381 SolverSat, 578 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=840occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 279 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...