/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 11:27:48,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 11:27:48,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 11:27:48,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 11:27:48,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 11:27:48,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 11:27:48,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 11:27:48,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 11:27:48,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 11:27:48,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 11:27:48,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 11:27:48,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 11:27:48,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 11:27:48,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 11:27:48,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 11:27:48,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 11:27:48,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 11:27:48,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 11:27:48,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 11:27:48,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 11:27:48,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 11:27:48,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 11:27:48,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 11:27:48,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 11:27:48,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 11:27:48,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 11:27:48,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 11:27:48,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 11:27:48,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 11:27:48,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 11:27:48,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 11:27:48,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 11:27:48,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 11:27:48,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 11:27:48,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 11:27:48,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 11:27:48,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 11:27:48,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 11:27:48,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 11:27:48,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 11:27:48,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 11:27:48,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 11:27:48,842 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 11:27:48,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 11:27:48,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 11:27:48,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 11:27:48,844 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 11:27:48,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 11:27:48,845 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 11:27:48,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 11:27:48,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 11:27:48,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 11:27:48,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 11:27:48,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 11:27:48,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 11:27:48,846 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 11:27:48,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 11:27:48,847 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 11:27:48,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 11:27:48,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 11:27:48,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 11:27:48,847 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 11:27:48,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 11:27:48,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:27:48,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 11:27:48,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 11:27:48,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 11:27:48,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 11:27:48,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 11:27:48,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 11:27:48,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 11:27:48,849 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 11:27:49,118 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 11:27:49,133 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 11:27:49,136 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 11:27:49,138 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 11:27:49,138 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 11:27:49,139 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-07-17 11:27:49,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ea7a367e/bfa10d85a71e4ba0903074c90bb0ddc7/FLAG9c1162e6b [2020-07-17 11:27:49,765 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 11:27:49,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-07-17 11:27:49,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ea7a367e/bfa10d85a71e4ba0903074c90bb0ddc7/FLAG9c1162e6b [2020-07-17 11:27:50,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ea7a367e/bfa10d85a71e4ba0903074c90bb0ddc7 [2020-07-17 11:27:50,053 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 11:27:50,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 11:27:50,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 11:27:50,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 11:27:50,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 11:27:50,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:27:50" (1/1) ... [2020-07-17 11:27:50,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66baa42b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:27:50, skipping insertion in model container [2020-07-17 11:27:50,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:27:50" (1/1) ... [2020-07-17 11:27:50,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 11:27:50,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 11:27:50,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:27:50,473 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 11:27:50,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:27:50,730 INFO L208 MainTranslator]: Completed translation [2020-07-17 11:27:50,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:27:50 WrapperNode [2020-07-17 11:27:50,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 11:27:50,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 11:27:50,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 11:27:50,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 11:27:50,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:27:50" (1/1) ... [2020-07-17 11:27:50,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:27:50" (1/1) ... [2020-07-17 11:27:50,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:27:50" (1/1) ... [2020-07-17 11:27:50,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:27:50" (1/1) ... [2020-07-17 11:27:50,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:27:50" (1/1) ... [2020-07-17 11:27:50,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:27:50" (1/1) ... [2020-07-17 11:27:50,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:27:50" (1/1) ... [2020-07-17 11:27:50,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 11:27:50,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 11:27:50,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 11:27:50,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 11:27:50,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:27:50" (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 [2020-07-17 11:27:50,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 11:27:50,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 11:27:50,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-07-17 11:27:50,883 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-07-17 11:27:50,883 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-07-17 11:27:50,883 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-07-17 11:27:50,883 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-07-17 11:27:50,883 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-07-17 11:27:50,883 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-07-17 11:27:50,884 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-07-17 11:27:50,884 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-07-17 11:27:50,884 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-07-17 11:27:50,884 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-07-17 11:27:50,884 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-07-17 11:27:50,884 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-07-17 11:27:50,885 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-07-17 11:27:50,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-07-17 11:27:50,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-07-17 11:27:50,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-07-17 11:27:50,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-07-17 11:27:50,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-07-17 11:27:50,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-07-17 11:27:50,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-07-17 11:27:50,886 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-07-17 11:27:50,886 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-07-17 11:27:50,886 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-07-17 11:27:50,886 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-07-17 11:27:50,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-07-17 11:27:50,887 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-07-17 11:27:50,887 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-07-17 11:27:50,887 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-07-17 11:27:50,887 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-07-17 11:27:50,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 11:27:50,887 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-07-17 11:27:50,888 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-07-17 11:27:50,888 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-07-17 11:27:50,888 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-07-17 11:27:50,888 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-07-17 11:27:50,888 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-07-17 11:27:50,889 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-07-17 11:27:50,889 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-07-17 11:27:50,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 11:27:50,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 11:27:50,889 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-07-17 11:27:50,889 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-07-17 11:27:50,890 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-07-17 11:27:50,890 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-07-17 11:27:50,890 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-07-17 11:27:50,890 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-07-17 11:27:50,890 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-07-17 11:27:50,890 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-07-17 11:27:50,891 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-07-17 11:27:50,891 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-07-17 11:27:50,891 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-07-17 11:27:50,891 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-07-17 11:27:50,891 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-07-17 11:27:50,891 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-07-17 11:27:50,891 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-07-17 11:27:50,892 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-07-17 11:27:50,892 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-07-17 11:27:50,892 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-07-17 11:27:50,892 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-07-17 11:27:50,892 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-07-17 11:27:50,892 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-07-17 11:27:50,892 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-07-17 11:27:50,893 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-07-17 11:27:50,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 11:27:50,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-07-17 11:27:50,893 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 11:27:50,893 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-17 11:27:50,893 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-07-17 11:27:50,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 11:27:50,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-17 11:27:50,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 11:27:50,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-17 11:27:50,894 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-07-17 11:27:50,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 11:27:50,895 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-07-17 11:27:50,895 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-07-17 11:27:50,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 11:27:50,895 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-07-17 11:27:50,895 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-07-17 11:27:50,895 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-07-17 11:27:50,895 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-07-17 11:27:50,896 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-07-17 11:27:50,896 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-07-17 11:27:50,896 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-07-17 11:27:50,896 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-07-17 11:27:50,896 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-07-17 11:27:50,896 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-07-17 11:27:50,897 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-07-17 11:27:50,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 11:27:50,897 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-07-17 11:27:50,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 11:27:50,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-17 11:27:50,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 11:27:51,949 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 11:27:51,949 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-07-17 11:27:51,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:27:51 BoogieIcfgContainer [2020-07-17 11:27:51,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 11:27:51,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 11:27:51,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 11:27:51,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 11:27:51,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 11:27:50" (1/3) ... [2020-07-17 11:27:51,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1175fed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:27:51, skipping insertion in model container [2020-07-17 11:27:51,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:27:50" (2/3) ... [2020-07-17 11:27:51,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1175fed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:27:51, skipping insertion in model container [2020-07-17 11:27:51,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:27:51" (3/3) ... [2020-07-17 11:27:51,962 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product51.cil.c [2020-07-17 11:27:51,973 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 11:27:51,980 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 11:27:51,994 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 11:27:52,016 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 11:27:52,017 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 11:27:52,017 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 11:27:52,017 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 11:27:52,017 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 11:27:52,017 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 11:27:52,018 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 11:27:52,018 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 11:27:52,041 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-07-17 11:27:52,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-17 11:27:52,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:27:52,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:27:52,052 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:27:52,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:27:52,057 INFO L82 PathProgramCache]: Analyzing trace with hash -199381509, now seen corresponding path program 1 times [2020-07-17 11:27:52,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:27:52,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941016129] [2020-07-17 11:27:52,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:27:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:52,701 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-17 11:27:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:27:52,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941016129] [2020-07-17 11:27:52,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:27:52,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 11:27:52,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848747671] [2020-07-17 11:27:52,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 11:27:52,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:27:52,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 11:27:52,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 11:27:52,849 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 3 states. [2020-07-17 11:27:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:27:54,011 INFO L93 Difference]: Finished difference Result 311 states and 407 transitions. [2020-07-17 11:27:54,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 11:27:54,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-07-17 11:27:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:27:54,036 INFO L225 Difference]: With dead ends: 311 [2020-07-17 11:27:54,036 INFO L226 Difference]: Without dead ends: 168 [2020-07-17 11:27:54,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 11:27:54,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-17 11:27:54,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2020-07-17 11:27:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-17 11:27:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-07-17 11:27:54,169 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 46 [2020-07-17 11:27:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:27:54,169 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-07-17 11:27:54,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 11:27:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-07-17 11:27:54,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-17 11:27:54,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:27:54,173 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] [2020-07-17 11:27:54,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 11:27:54,174 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:27:54,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:27:54,174 INFO L82 PathProgramCache]: Analyzing trace with hash 822116352, now seen corresponding path program 1 times [2020-07-17 11:27:54,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:27:54,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341929733] [2020-07-17 11:27:54,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:27:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:54,538 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-17 11:27:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:27:54,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341929733] [2020-07-17 11:27:54,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:27:54,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 11:27:54,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831421049] [2020-07-17 11:27:54,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 11:27:54,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:27:54,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 11:27:54,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 11:27:54,628 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 4 states. [2020-07-17 11:27:55,039 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-17 11:27:55,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:27:55,918 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2020-07-17 11:27:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:27:55,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-07-17 11:27:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:27:55,927 INFO L225 Difference]: With dead ends: 238 [2020-07-17 11:27:55,928 INFO L226 Difference]: Without dead ends: 152 [2020-07-17 11:27:55,929 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 [2020-07-17 11:27:55,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-17 11:27:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2020-07-17 11:27:55,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-17 11:27:55,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2020-07-17 11:27:55,974 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 47 [2020-07-17 11:27:55,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:27:55,974 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2020-07-17 11:27:55,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 11:27:55,974 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2020-07-17 11:27:55,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-17 11:27:55,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:27:55,977 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] [2020-07-17 11:27:55,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 11:27:55,977 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:27:55,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:27:55,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1772796698, now seen corresponding path program 1 times [2020-07-17 11:27:55,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:27:55,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197791042] [2020-07-17 11:27:55,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:27:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:56,307 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-17 11:27:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:27:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:27:56,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197791042] [2020-07-17 11:27:56,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:27:56,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 11:27:56,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266504651] [2020-07-17 11:27:56,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 11:27:56,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:27:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 11:27:56,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 11:27:56,384 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand 8 states. [2020-07-17 11:27:56,750 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-07-17 11:27:57,039 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-07-17 11:27:57,314 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-07-17 11:27:57,558 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-07-17 11:27:58,298 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-17 11:27:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:27:59,998 INFO L93 Difference]: Finished difference Result 427 states and 530 transitions. [2020-07-17 11:27:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 11:27:59,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-07-17 11:27:59,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:28:00,004 INFO L225 Difference]: With dead ends: 427 [2020-07-17 11:28:00,004 INFO L226 Difference]: Without dead ends: 326 [2020-07-17 11:28:00,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-07-17 11:28:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-07-17 11:28:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 268. [2020-07-17 11:28:00,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-07-17 11:28:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 324 transitions. [2020-07-17 11:28:00,076 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 324 transitions. Word has length 51 [2020-07-17 11:28:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:28:00,077 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 324 transitions. [2020-07-17 11:28:00,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 11:28:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 324 transitions. [2020-07-17 11:28:00,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-17 11:28:00,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:28:00,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:28:00,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 11:28:00,081 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:28:00,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:28:00,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1539786498, now seen corresponding path program 1 times [2020-07-17 11:28:00,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:28:00,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905159488] [2020-07-17 11:28:00,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:28:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:00,369 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-17 11:28:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:28:00,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905159488] [2020-07-17 11:28:00,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:28:00,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 11:28:00,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688149818] [2020-07-17 11:28:00,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 11:28:00,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:28:00,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 11:28:00,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 11:28:00,484 INFO L87 Difference]: Start difference. First operand 268 states and 324 transitions. Second operand 8 states. [2020-07-17 11:28:00,879 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-07-17 11:28:01,952 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-07-17 11:28:02,297 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-07-17 11:28:02,588 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-07-17 11:28:02,891 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-07-17 11:28:03,351 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-17 11:28:04,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:28:04,165 INFO L93 Difference]: Finished difference Result 862 states and 1117 transitions. [2020-07-17 11:28:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 11:28:04,166 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-07-17 11:28:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:28:04,172 INFO L225 Difference]: With dead ends: 862 [2020-07-17 11:28:04,173 INFO L226 Difference]: Without dead ends: 618 [2020-07-17 11:28:04,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-07-17 11:28:04,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-07-17 11:28:04,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 491. [2020-07-17 11:28:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-07-17 11:28:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 598 transitions. [2020-07-17 11:28:04,301 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 598 transitions. Word has length 57 [2020-07-17 11:28:04,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:28:04,301 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 598 transitions. [2020-07-17 11:28:04,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 11:28:04,302 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 598 transitions. [2020-07-17 11:28:04,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-17 11:28:04,306 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:28:04,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:28:04,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 11:28:04,307 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:28:04,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:28:04,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1493126654, now seen corresponding path program 1 times [2020-07-17 11:28:04,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:28:04,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151056947] [2020-07-17 11:28:04,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:28:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:04,651 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-17 11:28:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:28:04,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151056947] [2020-07-17 11:28:04,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:28:04,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 11:28:04,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578663519] [2020-07-17 11:28:04,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 11:28:04,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:28:04,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 11:28:04,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-17 11:28:04,769 INFO L87 Difference]: Start difference. First operand 491 states and 598 transitions. Second operand 9 states. [2020-07-17 11:28:05,231 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-07-17 11:28:06,193 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-07-17 11:28:06,468 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-07-17 11:28:06,716 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-07-17 11:28:07,203 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-07-17 11:28:07,507 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-17 11:28:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:28:08,310 INFO L93 Difference]: Finished difference Result 1371 states and 1840 transitions. [2020-07-17 11:28:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 11:28:08,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-07-17 11:28:08,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:28:08,318 INFO L225 Difference]: With dead ends: 1371 [2020-07-17 11:28:08,319 INFO L226 Difference]: Without dead ends: 904 [2020-07-17 11:28:08,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-07-17 11:28:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-07-17 11:28:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 723. [2020-07-17 11:28:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2020-07-17 11:28:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 891 transitions. [2020-07-17 11:28:08,456 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 891 transitions. Word has length 61 [2020-07-17 11:28:08,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:28:08,457 INFO L479 AbstractCegarLoop]: Abstraction has 723 states and 891 transitions. [2020-07-17 11:28:08,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 11:28:08,457 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 891 transitions. [2020-07-17 11:28:08,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-17 11:28:08,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:28:08,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:28:08,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 11:28:08,461 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:28:08,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:28:08,462 INFO L82 PathProgramCache]: Analyzing trace with hash 807556796, now seen corresponding path program 1 times [2020-07-17 11:28:08,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:28:08,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127738744] [2020-07-17 11:28:08,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:28:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:08,685 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-17 11:28:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:28:08,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127738744] [2020-07-17 11:28:08,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:28:08,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 11:28:08,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615738725] [2020-07-17 11:28:08,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 11:28:08,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:28:08,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 11:28:08,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-17 11:28:08,831 INFO L87 Difference]: Start difference. First operand 723 states and 891 transitions. Second operand 9 states. [2020-07-17 11:28:09,908 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-07-17 11:28:10,166 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-07-17 11:28:10,433 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-17 11:28:10,697 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-17 11:28:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:28:11,775 INFO L93 Difference]: Finished difference Result 1679 states and 2233 transitions. [2020-07-17 11:28:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 11:28:11,775 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-07-17 11:28:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:28:11,787 INFO L225 Difference]: With dead ends: 1679 [2020-07-17 11:28:11,787 INFO L226 Difference]: Without dead ends: 980 [2020-07-17 11:28:11,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-07-17 11:28:11,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-07-17 11:28:11,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 749. [2020-07-17 11:28:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-07-17 11:28:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 919 transitions. [2020-07-17 11:28:11,948 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 919 transitions. Word has length 83 [2020-07-17 11:28:11,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:28:11,948 INFO L479 AbstractCegarLoop]: Abstraction has 749 states and 919 transitions. [2020-07-17 11:28:11,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 11:28:11,948 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 919 transitions. [2020-07-17 11:28:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-17 11:28:11,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:28:11,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:28:11,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 11:28:11,954 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:28:11,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:28:11,955 INFO L82 PathProgramCache]: Analyzing trace with hash 830189050, now seen corresponding path program 1 times [2020-07-17 11:28:11,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:28:11,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284001825] [2020-07-17 11:28:11,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:28:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:12,222 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-17 11:28:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:28:12,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284001825] [2020-07-17 11:28:12,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:28:12,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-17 11:28:12,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844371086] [2020-07-17 11:28:12,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 11:28:12,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:28:12,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 11:28:12,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-17 11:28:12,353 INFO L87 Difference]: Start difference. First operand 749 states and 919 transitions. Second operand 11 states. [2020-07-17 11:28:12,861 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-17 11:28:13,121 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-17 11:28:13,357 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-17 11:28:14,051 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-17 11:28:14,347 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-17 11:28:14,596 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-17 11:28:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:28:15,902 INFO L93 Difference]: Finished difference Result 1733 states and 2344 transitions. [2020-07-17 11:28:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 11:28:15,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-07-17 11:28:15,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:28:15,910 INFO L225 Difference]: With dead ends: 1733 [2020-07-17 11:28:15,911 INFO L226 Difference]: Without dead ends: 1008 [2020-07-17 11:28:15,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-07-17 11:28:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2020-07-17 11:28:16,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 765. [2020-07-17 11:28:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-07-17 11:28:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 935 transitions. [2020-07-17 11:28:16,067 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 935 transitions. Word has length 83 [2020-07-17 11:28:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:28:16,067 INFO L479 AbstractCegarLoop]: Abstraction has 765 states and 935 transitions. [2020-07-17 11:28:16,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 11:28:16,068 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 935 transitions. [2020-07-17 11:28:16,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-17 11:28:16,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:28:16,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:28:16,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 11:28:16,071 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:28:16,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:28:16,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1855681049, now seen corresponding path program 1 times [2020-07-17 11:28:16,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:28:16,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854958778] [2020-07-17 11:28:16,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:28:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:16,393 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-17 11:28:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:28:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:28:16,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854958778] [2020-07-17 11:28:16,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:28:16,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 11:28:16,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084283316] [2020-07-17 11:28:16,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 11:28:16,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:28:16,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 11:28:16,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-17 11:28:16,524 INFO L87 Difference]: Start difference. First operand 765 states and 935 transitions. Second operand 7 states. [2020-07-17 11:28:16,919 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-07-17 11:28:17,439 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-07-17 11:28:20,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:28:20,060 INFO L93 Difference]: Finished difference Result 2622 states and 3569 transitions. [2020-07-17 11:28:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 11:28:20,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-07-17 11:28:20,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:28:20,078 INFO L225 Difference]: With dead ends: 2622 [2020-07-17 11:28:20,079 INFO L226 Difference]: Without dead ends: 1881 [2020-07-17 11:28:20,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-07-17 11:28:20,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-07-17 11:28:20,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1579. [2020-07-17 11:28:20,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-07-17 11:28:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 1949 transitions. [2020-07-17 11:28:20,472 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 1949 transitions. Word has length 83 [2020-07-17 11:28:20,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:28:20,473 INFO L479 AbstractCegarLoop]: Abstraction has 1579 states and 1949 transitions. [2020-07-17 11:28:20,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 11:28:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 1949 transitions. [2020-07-17 11:28:20,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-17 11:28:20,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:28:20,476 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] [2020-07-17 11:28:20,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 11:28:20,477 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:28:20,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:28:20,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1308897473, now seen corresponding path program 1 times [2020-07-17 11:28:20,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:28:20,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217881589] [2020-07-17 11:28:20,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:28:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 11:28:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 11:28:20,703 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 11:28:20,703 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 11:28:20,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 11:28:20,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 11:28:20 BoogieIcfgContainer [2020-07-17 11:28:20,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 11:28:20,855 INFO L168 Benchmark]: Toolchain (without parser) took 30800.95 ms. Allocated memory was 138.4 MB in the beginning and 620.2 MB in the end (delta: 481.8 MB). Free memory was 101.7 MB in the beginning and 105.5 MB in the end (delta: -3.8 MB). Peak memory consumption was 478.0 MB. Max. memory is 7.1 GB. [2020-07-17 11:28:20,856 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 11:28:20,857 INFO L168 Benchmark]: CACSL2BoogieTranslator took 674.17 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 101.2 MB in the beginning and 173.2 MB in the end (delta: -71.9 MB). Peak memory consumption was 30.0 MB. Max. memory is 7.1 GB. [2020-07-17 11:28:20,857 INFO L168 Benchmark]: Boogie Preprocessor took 85.14 ms. Allocated memory is still 202.9 MB. Free memory was 173.2 MB in the beginning and 168.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. [2020-07-17 11:28:20,858 INFO L168 Benchmark]: RCFGBuilder took 1137.62 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 168.2 MB in the beginning and 197.8 MB in the end (delta: -29.6 MB). Peak memory consumption was 85.2 MB. Max. memory is 7.1 GB. [2020-07-17 11:28:20,859 INFO L168 Benchmark]: TraceAbstraction took 28898.29 ms. Allocated memory was 235.9 MB in the beginning and 620.2 MB in the end (delta: 384.3 MB). Free memory was 197.8 MB in the beginning and 105.5 MB in the end (delta: 92.3 MB). Peak memory consumption was 476.6 MB. Max. memory is 7.1 GB. [2020-07-17 11:28:20,862 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 138.4 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 674.17 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 101.2 MB in the beginning and 173.2 MB in the end (delta: -71.9 MB). Peak memory consumption was 30.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 85.14 ms. Allocated memory is still 202.9 MB. Free memory was 173.2 MB in the beginning and 168.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1137.62 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 168.2 MB in the beginning and 197.8 MB in the end (delta: -29.6 MB). Peak memory consumption was 85.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28898.29 ms. Allocated memory was 235.9 MB in the beginning and 620.2 MB in the end (delta: 384.3 MB). Free memory was 197.8 MB in the beginning and 105.5 MB in the end (delta: 92.3 MB). Peak memory consumption was 476.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 704]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L121] int pumpRunning = 0; [L122] int systemActive = 1; [L503] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L773] int cleanupTimeShifts = 4; [L870] int waterLevel = 1; [L871] int methaneLevelCritical = 0; VAL [\old(cleanupTimeShifts)=172, \old(head)=164, \old(head)=176, \old(methaneLevelCritical)=148, \old(pumpRunning)=140, \old(systemActive)=139, \old(waterLevel)=146, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L846] int retValue_acc ; [L847] int tmp ; VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L851] FCALL select_helpers() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L852] FCALL select_features() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L853] CALL, EXPR valid_product() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L738] int retValue_acc ; [L741] retValue_acc = 1 [L742] return (retValue_acc); VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, \result=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, retValue_acc=1, systemActive=1, waterLevel=1] [L853] RET, EXPR valid_product() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, valid_product()=1, waterLevel=1] [L853] tmp = valid_product() [L855] COND TRUE \read(tmp) VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, tmp=1, waterLevel=1] [L857] FCALL setup() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, tmp=1, waterLevel=1] [L858] CALL runTest() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L840] CALL test() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L46] int splverifierCounter ; [L47] int tmp ; [L48] int tmp___0 ; [L49] int tmp___1 ; [L50] int tmp___2 ; [L53] splverifierCounter = 0 VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L55] COND TRUE 1 VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L57] COND TRUE splverifierCounter < 4 VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L63] tmp = __VERIFIER_nondet_int() [L65] COND TRUE \read(tmp) VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=1] [L67] CALL waterRise() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L888] COND TRUE waterLevel < 2 [L889] waterLevel = waterLevel + 1 VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L67] RET waterRise() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=2] [L73] tmp___0 = __VERIFIER_nondet_int() [L75] COND TRUE \read(tmp___0) VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=1, waterLevel=2] [L77] CALL changeMethaneLevel() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L900] COND FALSE !(\read(methaneLevelCritical)) [L903] methaneLevelCritical = 1 VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L77] RET changeMethaneLevel() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=1, waterLevel=2] [L83] tmp___2 = __VERIFIER_nondet_int() [L85] COND TRUE \read(tmp___2) VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=1, tmp___2=-1, waterLevel=2] [L100] CALL timeShift() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L129] COND FALSE !(\read(pumpRunning)) VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L136] COND TRUE \read(systemActive) VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L138] CALL processEnvironment() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L184] int tmp ; VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L187] COND FALSE !(\read(pumpRunning)) VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L202] CALL processEnvironment__wrappee__highWaterSensor() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L158] int tmp ; VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L161] COND TRUE ! pumpRunning VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L163] CALL, EXPR isHighWaterLevel() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L281] int retValue_acc ; [L282] int tmp ; [L283] int tmp___0 ; VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L287] CALL, EXPR isHighWaterSensorDry() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L950] int retValue_acc ; VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L953] COND FALSE !(waterLevel < 2) [L957] retValue_acc = 0 [L958] return (retValue_acc); VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, \result=0, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, retValue_acc=0, systemActive=1, waterLevel=2] [L287] RET, EXPR isHighWaterSensorDry() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, isHighWaterSensorDry()=0, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L287] tmp = isHighWaterSensorDry() [L289] COND FALSE !(\read(tmp)) [L292] tmp___0 = 1 VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, tmp=0, tmp___0=1, waterLevel=2] [L294] retValue_acc = tmp___0 [L295] return (retValue_acc); VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, \result=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, retValue_acc=1, systemActive=1, tmp=0, tmp___0=1, waterLevel=2] [L163] RET, EXPR isHighWaterLevel() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, isHighWaterLevel()=1, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L163] tmp = isHighWaterLevel() [L165] COND TRUE \read(tmp) VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, tmp=1, waterLevel=2] [L167] CALL activatePump() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=0, systemActive=1, waterLevel=2] [L212] pumpRunning = 1 VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=2] [L167] RET activatePump() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, tmp=1, waterLevel=2] [L202] RET processEnvironment__wrappee__highWaterSensor() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=2] [L138] RET processEnvironment() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=2] [L144] CALL __utac_acc__Specification1_spec__1() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=2] [L748] int tmp ; [L749] int tmp___0 ; VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=2] [L753] CALL, EXPR isMethaneLevelCritical() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=2] [L909] int retValue_acc ; [L912] retValue_acc = methaneLevelCritical [L913] return (retValue_acc); VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, \result=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, retValue_acc=1, systemActive=1, waterLevel=2] [L753] RET, EXPR isMethaneLevelCritical() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, isMethaneLevelCritical()=1, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=2] [L753] tmp = isMethaneLevelCritical() [L755] COND TRUE \read(tmp) VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, tmp=1, waterLevel=2] [L757] CALL, EXPR isPumpRunning() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=2] [L236] int retValue_acc ; [L239] retValue_acc = pumpRunning [L240] return (retValue_acc); VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, \result=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, retValue_acc=1, systemActive=1, waterLevel=2] [L757] RET, EXPR isPumpRunning() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, isPumpRunning()=1, methaneLevelCritical=1, pumpRunning=1, systemActive=1, tmp=1, waterLevel=2] [L757] tmp___0 = isPumpRunning() [L759] COND TRUE \read(tmp___0) VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, tmp=1, tmp___0=1, waterLevel=2] [L761] CALL __automaton_fail() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=2] [L704] __VERIFIER_error() VAL [\old(methaneLevelCritical)=0, \old(pumpRunning)=0, \old(systemActive)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 241 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.6s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 23.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 987 SDtfs, 1945 SDslu, 1023 SDs, 0 SdLazy, 5141 SolverSat, 1211 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 179 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1579occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 1203 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 598 NumberOfCodeBlocks, 598 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 503 ConstructedInterpolants, 0 QuantifiedInterpolants, 150088 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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...