/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/product-lines/minepump_spec4_product36.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:56:33,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:56:33,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:56:33,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:56:33,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:56:33,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:56:33,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:56:33,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:56:33,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:56:33,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:56:33,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:56:33,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:56:33,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:56:33,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:56:33,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:56:33,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:56:33,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:56:33,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:56:33,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:56:33,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:56:33,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:56:33,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:56:33,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:56:33,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:56:33,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:56:33,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:56:33,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:56:33,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:56:33,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:56:33,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:56:33,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:56:33,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:56:33,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:56:33,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:56:33,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:56:33,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:56:33,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:56:33,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:56:33,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:56:33,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:56:33,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:56:33,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 23:56:33,967 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:56:33,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:56:33,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:56:33,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:56:33,969 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:56:33,969 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:56:33,969 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:56:33,969 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:56:33,969 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:56:33,969 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:56:33,970 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:56:33,970 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:56:33,970 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:56:33,970 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:56:33,970 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:56:33,970 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:56:33,971 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:56:33,971 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:56:33,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:56:33,971 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:56:33,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:56:33,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:56:33,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:56:33,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:56:33,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:56:33,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:56:33,972 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:56:33,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:56:33,972 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:56:33,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:56:33,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:56:33,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:56:33,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:56:33,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:56:33,973 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:56:33,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:56:33,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:56:33,973 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:56:33,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:56:33,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:56:33,974 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:56:33,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:56:34,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:56:34,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:56:34,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:56:34,206 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:56:34,209 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:56:34,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/minepump_spec4_product36.cil.c [2023-03-31 23:56:35,331 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:56:35,551 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:56:35,551 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product36.cil.c [2023-03-31 23:56:35,562 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c557ca6a5/5795382e3a114279a61bae1a7635c00e/FLAGc546d9668 [2023-03-31 23:56:35,574 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c557ca6a5/5795382e3a114279a61bae1a7635c00e [2023-03-31 23:56:35,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:56:35,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:56:35,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:56:35,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:56:35,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:56:35,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:56:35" (1/1) ... [2023-03-31 23:56:35,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cde84f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:56:35, skipping insertion in model container [2023-03-31 23:56:35,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:56:35" (1/1) ... [2023-03-31 23:56:35,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:56:35,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:56:35,738 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product36.cil.c[6627,6640] [2023-03-31 23:56:35,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:56:35,780 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:56:35,804 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product36.cil.c[6627,6640] [2023-03-31 23:56:35,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:56:35,871 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:56:35,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:56:35 WrapperNode [2023-03-31 23:56:35,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:56:35,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:56:35,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:56:35,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:56:35,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:56:35" (1/1) ... [2023-03-31 23:56:35,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:56:35" (1/1) ... [2023-03-31 23:56:35,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:56:35" (1/1) ... [2023-03-31 23:56:35,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:56:35" (1/1) ... [2023-03-31 23:56:35,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:56:35" (1/1) ... [2023-03-31 23:56:35,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:56:35" (1/1) ... [2023-03-31 23:56:35,949 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:56:35" (1/1) ... [2023-03-31 23:56:35,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:56:35" (1/1) ... [2023-03-31 23:56:35,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:56:35,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:56:35,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:56:35,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:56:35,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:56:35" (1/1) ... [2023-03-31 23:56:35,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:56:35,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:56:35,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 23:56:36,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 23:56:36,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:56:36,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:56:36,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-03-31 23:56:36,021 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:56:36,021 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-03-31 23:56:36,021 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-03-31 23:56:36,021 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-03-31 23:56:36,021 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2023-03-31 23:56:36,021 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2023-03-31 23:56:36,021 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-03-31 23:56:36,021 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-03-31 23:56:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-03-31 23:56:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2023-03-31 23:56:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2023-03-31 23:56:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2023-03-31 23:56:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2023-03-31 23:56:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-03-31 23:56:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-03-31 23:56:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-03-31 23:56:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-03-31 23:56:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:56:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-03-31 23:56:36,022 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-03-31 23:56:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-03-31 23:56:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-03-31 23:56:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-03-31 23:56:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-03-31 23:56:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-03-31 23:56:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-03-31 23:56:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-03-31 23:56:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-03-31 23:56:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-03-31 23:56:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2023-03-31 23:56:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-03-31 23:56:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-03-31 23:56:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-03-31 23:56:36,023 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2023-03-31 23:56:36,024 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2023-03-31 23:56:36,024 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2023-03-31 23:56:36,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2023-03-31 23:56:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:56:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:56:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:56:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:56:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:56:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-03-31 23:56:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-03-31 23:56:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-03-31 23:56:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2023-03-31 23:56:36,024 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2023-03-31 23:56:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-03-31 23:56:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-03-31 23:56:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-03-31 23:56:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2023-03-31 23:56:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-03-31 23:56:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2023-03-31 23:56:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2023-03-31 23:56:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2023-03-31 23:56:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-03-31 23:56:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-03-31 23:56:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2023-03-31 23:56:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2023-03-31 23:56:36,025 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2023-03-31 23:56:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-03-31 23:56:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2023-03-31 23:56:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-03-31 23:56:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-03-31 23:56:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-03-31 23:56:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-03-31 23:56:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-03-31 23:56:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-03-31 23:56:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-03-31 23:56:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:56:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-03-31 23:56:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-03-31 23:56:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 23:56:36,026 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 23:56:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-03-31 23:56:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 23:56:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 23:56:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:56:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 23:56:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-03-31 23:56:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:56:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-03-31 23:56:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-03-31 23:56:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:56:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-03-31 23:56:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-03-31 23:56:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-03-31 23:56:36,027 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2023-03-31 23:56:36,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:56:36,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:56:36,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:56:36,125 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:56:36,127 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:56:36,565 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:56:36,680 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:56:36,681 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-03-31 23:56:36,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:56:36 BoogieIcfgContainer [2023-03-31 23:56:36,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:56:36,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:56:36,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:56:36,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:56:36,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:56:35" (1/3) ... [2023-03-31 23:56:36,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e258ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:56:36, skipping insertion in model container [2023-03-31 23:56:36,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:56:35" (2/3) ... [2023-03-31 23:56:36,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e258ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:56:36, skipping insertion in model container [2023-03-31 23:56:36,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:56:36" (3/3) ... [2023-03-31 23:56:36,691 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product36.cil.c [2023-03-31 23:56:36,704 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:56:36,704 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:56:36,751 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:56:36,757 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2a1d1a9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:56:36,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:56:36,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 73 states have internal predecessors, (77), 43 states have call successors, (43), 27 states have call predecessors, (43), 27 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) [2023-03-31 23:56:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 23:56:36,769 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:56:36,769 INFO L195 NwaCegarLoop]: 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] [2023-03-31 23:56:36,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:56:36,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:56:36,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1632771971, now seen corresponding path program 1 times [2023-03-31 23:56:36,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:56:36,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127011928] [2023-03-31 23:56:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:56:36,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:56:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:56:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:56:36,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:56:36,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127011928] [2023-03-31 23:56:36,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127011928] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:56:36,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:56:36,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 23:56:36,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985644162] [2023-03-31 23:56:36,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:56:36,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 23:56:36,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:56:37,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 23:56:37,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:56:37,031 INFO L87 Difference]: Start difference. First operand has 133 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 73 states have internal predecessors, (77), 43 states have call successors, (43), 27 states have call predecessors, (43), 27 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 23:56:37,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:56:37,095 INFO L93 Difference]: Finished difference Result 199 states and 240 transitions. [2023-03-31 23:56:37,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 23:56:37,097 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-03-31 23:56:37,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:56:37,105 INFO L225 Difference]: With dead ends: 199 [2023-03-31 23:56:37,105 INFO L226 Difference]: Without dead ends: 100 [2023-03-31 23:56:37,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:56:37,112 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:56:37,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:56:37,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-03-31 23:56:37,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-03-31 23:56:37,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 61 states have internal predecessors, (63), 28 states have call successors, (28), 25 states have call predecessors, (28), 20 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2023-03-31 23:56:37,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2023-03-31 23:56:37,159 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 42 [2023-03-31 23:56:37,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:56:37,160 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2023-03-31 23:56:37,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 23:56:37,161 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2023-03-31 23:56:37,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 23:56:37,164 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:56:37,165 INFO L195 NwaCegarLoop]: 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] [2023-03-31 23:56:37,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:56:37,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:56:37,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:56:37,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1023924806, now seen corresponding path program 1 times [2023-03-31 23:56:37,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:56:37,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943666059] [2023-03-31 23:56:37,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:56:37,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:56:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:56:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:56:37,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:56:37,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943666059] [2023-03-31 23:56:37,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943666059] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:56:37,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:56:37,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 23:56:37,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675493624] [2023-03-31 23:56:37,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:56:37,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:56:37,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:56:37,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:56:37,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 23:56:37,260 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 23:56:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:56:37,308 INFO L93 Difference]: Finished difference Result 145 states and 164 transitions. [2023-03-31 23:56:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:56:37,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-03-31 23:56:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:56:37,311 INFO L225 Difference]: With dead ends: 145 [2023-03-31 23:56:37,311 INFO L226 Difference]: Without dead ends: 92 [2023-03-31 23:56:37,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 23:56:37,315 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 11 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:56:37,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 161 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:56:37,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-03-31 23:56:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-03-31 23:56:37,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 56 states have internal predecessors, (57), 25 states have call successors, (25), 24 states have call predecessors, (25), 20 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2023-03-31 23:56:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2023-03-31 23:56:37,324 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 43 [2023-03-31 23:56:37,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:56:37,324 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2023-03-31 23:56:37,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 23:56:37,324 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2023-03-31 23:56:37,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 23:56:37,325 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:56:37,325 INFO L195 NwaCegarLoop]: 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] [2023-03-31 23:56:37,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:56:37,326 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:56:37,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:56:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash 862595848, now seen corresponding path program 1 times [2023-03-31 23:56:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:56:37,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580937240] [2023-03-31 23:56:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:56:37,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:56:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:56:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:56:37,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:56:37,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580937240] [2023-03-31 23:56:37,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580937240] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:56:37,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:56:37,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:56:37,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092163640] [2023-03-31 23:56:37,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:56:37,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:56:37,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:56:37,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:56:37,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:56:37,533 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-31 23:56:37,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:56:37,813 INFO L93 Difference]: Finished difference Result 277 states and 325 transitions. [2023-03-31 23:56:37,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:56:37,814 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2023-03-31 23:56:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:56:37,817 INFO L225 Difference]: With dead ends: 277 [2023-03-31 23:56:37,818 INFO L226 Difference]: Without dead ends: 207 [2023-03-31 23:56:37,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:56:37,824 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 197 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:56:37,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 402 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:56:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-03-31 23:56:37,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 185. [2023-03-31 23:56:37,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 100 states have (on average 1.27) internal successors, (127), 117 states have internal predecessors, (127), 45 states have call successors, (45), 43 states have call predecessors, (45), 39 states have return successors, (42), 37 states have call predecessors, (42), 41 states have call successors, (42) [2023-03-31 23:56:37,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 214 transitions. [2023-03-31 23:56:37,843 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 214 transitions. Word has length 47 [2023-03-31 23:56:37,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:56:37,843 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 214 transitions. [2023-03-31 23:56:37,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-31 23:56:37,844 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 214 transitions. [2023-03-31 23:56:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-31 23:56:37,846 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:56:37,847 INFO L195 NwaCegarLoop]: 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] [2023-03-31 23:56:37,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 23:56:37,847 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:56:37,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:56:37,847 INFO L85 PathProgramCache]: Analyzing trace with hash 215533973, now seen corresponding path program 1 times [2023-03-31 23:56:37,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:56:37,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823754172] [2023-03-31 23:56:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:56:37,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:56:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:56:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:56:38,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:56:38,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823754172] [2023-03-31 23:56:38,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823754172] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:56:38,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:56:38,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-03-31 23:56:38,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864172706] [2023-03-31 23:56:38,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:56:38,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 23:56:38,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:56:38,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 23:56:38,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:56:38,041 INFO L87 Difference]: Start difference. First operand 185 states and 214 transitions. Second operand has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-31 23:56:38,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:56:38,330 INFO L93 Difference]: Finished difference Result 635 states and 778 transitions. [2023-03-31 23:56:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-31 23:56:38,330 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2023-03-31 23:56:38,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:56:38,337 INFO L225 Difference]: With dead ends: 635 [2023-03-31 23:56:38,337 INFO L226 Difference]: Without dead ends: 472 [2023-03-31 23:56:38,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-03-31 23:56:38,343 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 169 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:56:38,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 562 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:56:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2023-03-31 23:56:38,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 448. [2023-03-31 23:56:38,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 253 states have (on average 1.2727272727272727) internal successors, (322), 293 states have internal predecessors, (322), 102 states have call successors, (102), 96 states have call predecessors, (102), 92 states have return successors, (109), 86 states have call predecessors, (109), 98 states have call successors, (109) [2023-03-31 23:56:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 533 transitions. [2023-03-31 23:56:38,391 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 533 transitions. Word has length 51 [2023-03-31 23:56:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:56:38,392 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 533 transitions. [2023-03-31 23:56:38,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-31 23:56:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 533 transitions. [2023-03-31 23:56:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-03-31 23:56:38,398 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:56:38,398 INFO L195 NwaCegarLoop]: 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] [2023-03-31 23:56:38,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 23:56:38,398 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:56:38,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:56:38,399 INFO L85 PathProgramCache]: Analyzing trace with hash 189838381, now seen corresponding path program 1 times [2023-03-31 23:56:38,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:56:38,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134584916] [2023-03-31 23:56:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:56:38,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:56:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:56:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:56:38,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:56:38,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134584916] [2023-03-31 23:56:38,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134584916] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:56:38,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:56:38,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:56:38,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144527962] [2023-03-31 23:56:38,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:56:38,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:56:38,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:56:38,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:56:38,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:56:38,537 INFO L87 Difference]: Start difference. First operand 448 states and 533 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-03-31 23:56:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:56:38,723 INFO L93 Difference]: Finished difference Result 1193 states and 1555 transitions. [2023-03-31 23:56:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:56:38,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2023-03-31 23:56:38,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:56:38,726 INFO L225 Difference]: With dead ends: 1193 [2023-03-31 23:56:38,726 INFO L226 Difference]: Without dead ends: 767 [2023-03-31 23:56:38,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:56:38,728 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 125 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:56:38,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 98 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:56:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2023-03-31 23:56:38,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 662. [2023-03-31 23:56:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 385 states have (on average 1.2337662337662338) internal successors, (475), 425 states have internal predecessors, (475), 137 states have call successors, (137), 135 states have call predecessors, (137), 139 states have return successors, (178), 136 states have call predecessors, (178), 133 states have call successors, (178) [2023-03-31 23:56:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 790 transitions. [2023-03-31 23:56:38,772 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 790 transitions. Word has length 54 [2023-03-31 23:56:38,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:56:38,773 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 790 transitions. [2023-03-31 23:56:38,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-03-31 23:56:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 790 transitions. [2023-03-31 23:56:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-31 23:56:38,775 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:56:38,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:56:38,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 23:56:38,775 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:56:38,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:56:38,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1441182508, now seen corresponding path program 1 times [2023-03-31 23:56:38,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:56:38,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814469977] [2023-03-31 23:56:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:56:38,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:56:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:56:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 23:56:38,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:56:38,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814469977] [2023-03-31 23:56:38,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814469977] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:56:38,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816060823] [2023-03-31 23:56:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:56:38,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:56:38,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:56:38,939 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:56:38,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:56:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:56:39,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 51 conjunts are in the unsatisfiable core [2023-03-31 23:56:39,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:56:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 23:56:39,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:56:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:56:39,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816060823] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:56:39,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113176594] [2023-03-31 23:56:39,915 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2023-03-31 23:56:39,915 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:56:39,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:56:39,921 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:56:39,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:56:40,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-03-31 23:56:40,089 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2023-03-31 23:56:40,219 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 32 for LOIs [2023-03-31 23:56:40,229 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 24 for LOIs [2023-03-31 23:56:40,231 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 24 for LOIs [2023-03-31 23:56:40,233 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 32 for LOIs [2023-03-31 23:56:40,973 INFO L197 IcfgInterpreter]: Interpreting procedure stopSystem with input of size 36 for LOIs [2023-03-31 23:56:40,984 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 35 for LOIs [2023-03-31 23:56:40,991 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 31 for LOIs [2023-03-31 23:56:41,020 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 21 for LOIs [2023-03-31 23:56:41,051 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 21 for LOIs [2023-03-31 23:56:41,053 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 21 for LOIs [2023-03-31 23:56:41,054 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 24 for LOIs [2023-03-31 23:56:41,057 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 24 for LOIs [2023-03-31 23:56:41,058 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:56:42,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1113176594] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:56:42,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:56:42,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [7, 14, 12] total 60 [2023-03-31 23:56:42,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937804837] [2023-03-31 23:56:42,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:56:42,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-03-31 23:56:42,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:56:42,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-03-31 23:56:42,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=3191, Unknown=0, NotChecked=0, Total=3540 [2023-03-31 23:56:42,993 INFO L87 Difference]: Start difference. First operand 662 states and 790 transitions. Second operand has 34 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (15), 8 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-03-31 23:56:55,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:56:55,522 INFO L93 Difference]: Finished difference Result 1780 states and 2216 transitions. [2023-03-31 23:56:55,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-03-31 23:56:55,526 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (15), 8 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 79 [2023-03-31 23:56:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:56:55,531 INFO L225 Difference]: With dead ends: 1780 [2023-03-31 23:56:55,531 INFO L226 Difference]: Without dead ends: 1140 [2023-03-31 23:56:55,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6289 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=2774, Invalid=17818, Unknown=0, NotChecked=0, Total=20592 [2023-03-31 23:56:55,538 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 776 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 3920 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 4515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 3920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:56:55,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 261 Invalid, 4515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 3920 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-03-31 23:56:55,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2023-03-31 23:56:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 894. [2023-03-31 23:56:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 529 states have (on average 1.2268431001890359) internal successors, (649), 579 states have internal predecessors, (649), 181 states have call successors, (181), 177 states have call predecessors, (181), 183 states have return successors, (230), 182 states have call predecessors, (230), 177 states have call successors, (230) [2023-03-31 23:56:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1060 transitions. [2023-03-31 23:56:55,694 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1060 transitions. Word has length 79 [2023-03-31 23:56:55,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:56:55,695 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1060 transitions. [2023-03-31 23:56:55,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (15), 8 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-03-31 23:56:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1060 transitions. [2023-03-31 23:56:55,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-03-31 23:56:55,702 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:56:55,702 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:56:55,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 23:56:55,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-31 23:56:55,907 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:56:55,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:56:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash -843370170, now seen corresponding path program 1 times [2023-03-31 23:56:55,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:56:55,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210358593] [2023-03-31 23:56:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:56:55,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:56:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:56:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 23:56:56,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:56:56,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210358593] [2023-03-31 23:56:56,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210358593] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:56:56,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049219742] [2023-03-31 23:56:56,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:56:56,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:56:56,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:56:56,152 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:56:56,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:56:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:56:56,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 51 conjunts are in the unsatisfiable core [2023-03-31 23:56:56,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:56:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 23:56:56,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:56:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:56:56,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049219742] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:56:56,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1090649874] [2023-03-31 23:56:56,801 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2023-03-31 23:56:56,802 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:56:56,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:56:56,802 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:56:56,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:56:56,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-03-31 23:56:56,893 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2023-03-31 23:56:56,964 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 32 for LOIs [2023-03-31 23:56:56,969 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 24 for LOIs [2023-03-31 23:56:56,972 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 24 for LOIs [2023-03-31 23:56:56,973 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 32 for LOIs [2023-03-31 23:56:57,474 INFO L197 IcfgInterpreter]: Interpreting procedure stopSystem with input of size 40 for LOIs [2023-03-31 23:56:57,483 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 35 for LOIs [2023-03-31 23:56:57,486 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 27 for LOIs [2023-03-31 23:56:57,497 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 21 for LOIs [2023-03-31 23:56:57,517 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 21 for LOIs [2023-03-31 23:56:57,519 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 21 for LOIs [2023-03-31 23:56:57,520 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 34 for LOIs [2023-03-31 23:56:57,523 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 24 for LOIs [2023-03-31 23:56:57,525 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 24 for LOIs [2023-03-31 23:56:57,526 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:56:59,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1090649874] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:56:59,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:56:59,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [7, 14, 12] total 63 [2023-03-31 23:56:59,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790780916] [2023-03-31 23:56:59,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:56:59,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-03-31 23:56:59,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:56:59,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-03-31 23:56:59,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3542, Unknown=0, NotChecked=0, Total=3906 [2023-03-31 23:56:59,627 INFO L87 Difference]: Start difference. First operand 894 states and 1060 transitions. Second operand has 37 states, 23 states have (on average 1.565217391304348) internal successors, (36), 31 states have internal predecessors, (36), 12 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2023-03-31 23:57:28,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:57:28,245 INFO L93 Difference]: Finished difference Result 2987 states and 4085 transitions. [2023-03-31 23:57:28,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2023-03-31 23:57:28,246 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 23 states have (on average 1.565217391304348) internal successors, (36), 31 states have internal predecessors, (36), 12 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2023-03-31 23:57:28,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:57:28,263 INFO L225 Difference]: With dead ends: 2987 [2023-03-31 23:57:28,263 INFO L226 Difference]: Without dead ends: 2341 [2023-03-31 23:57:28,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19972 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=5927, Invalid=50955, Unknown=0, NotChecked=0, Total=56882 [2023-03-31 23:57:28,293 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 2117 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 8375 mSolverCounterSat, 1736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2124 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 10111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1736 IncrementalHoareTripleChecker+Valid, 8375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-03-31 23:57:28,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2124 Valid, 904 Invalid, 10111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1736 Valid, 8375 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-03-31 23:57:28,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2023-03-31 23:57:28,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 912. [2023-03-31 23:57:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 535 states have (on average 1.2242990654205608) internal successors, (655), 591 states have internal predecessors, (655), 187 states have call successors, (187), 183 states have call predecessors, (187), 189 states have return successors, (236), 188 states have call predecessors, (236), 183 states have call successors, (236) [2023-03-31 23:57:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1078 transitions. [2023-03-31 23:57:28,494 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1078 transitions. Word has length 82 [2023-03-31 23:57:28,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:57:28,494 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 1078 transitions. [2023-03-31 23:57:28,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 23 states have (on average 1.565217391304348) internal successors, (36), 31 states have internal predecessors, (36), 12 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2023-03-31 23:57:28,494 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1078 transitions. [2023-03-31 23:57:28,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-03-31 23:57:28,496 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:57:28,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:57:28,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 23:57:28,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-03-31 23:57:28,706 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:57:28,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:57:28,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1831942901, now seen corresponding path program 1 times [2023-03-31 23:57:28,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:57:28,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609953954] [2023-03-31 23:57:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:57:28,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:57:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:57:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 23:57:28,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:57:28,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609953954] [2023-03-31 23:57:28,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609953954] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:57:28,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:57:28,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-03-31 23:57:28,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609242667] [2023-03-31 23:57:28,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:57:28,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:57:28,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:57:28,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:57:28,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:57:28,812 INFO L87 Difference]: Start difference. First operand 912 states and 1078 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2023-03-31 23:57:29,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:57:29,204 INFO L93 Difference]: Finished difference Result 1597 states and 1914 transitions. [2023-03-31 23:57:29,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 23:57:29,205 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 96 [2023-03-31 23:57:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:57:29,208 INFO L225 Difference]: With dead ends: 1597 [2023-03-31 23:57:29,208 INFO L226 Difference]: Without dead ends: 951 [2023-03-31 23:57:29,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-03-31 23:57:29,210 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 183 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:57:29,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 416 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:57:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2023-03-31 23:57:29,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 892. [2023-03-31 23:57:29,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 527 states have (on average 1.206831119544592) internal successors, (636), 581 states have internal predecessors, (636), 179 states have call successors, (179), 177 states have call predecessors, (179), 185 states have return successors, (199), 182 states have call predecessors, (199), 175 states have call successors, (199) [2023-03-31 23:57:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1014 transitions. [2023-03-31 23:57:29,302 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1014 transitions. Word has length 96 [2023-03-31 23:57:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:57:29,302 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 1014 transitions. [2023-03-31 23:57:29,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2023-03-31 23:57:29,302 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1014 transitions. [2023-03-31 23:57:29,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-03-31 23:57:29,303 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:57:29,303 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:57:29,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 23:57:29,304 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:57:29,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:57:29,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1535915487, now seen corresponding path program 1 times [2023-03-31 23:57:29,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:57:29,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095662689] [2023-03-31 23:57:29,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:57:29,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:57:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:57:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 23:57:29,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:57:29,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095662689] [2023-03-31 23:57:29,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095662689] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:57:29,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146791659] [2023-03-31 23:57:29,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:57:29,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:57:29,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:57:29,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:57:29,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:57:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:57:29,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 33 conjunts are in the unsatisfiable core [2023-03-31 23:57:29,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:57:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:57:29,953 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:57:29,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146791659] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:57:29,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:57:29,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 26 [2023-03-31 23:57:29,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056505137] [2023-03-31 23:57:29,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:57:29,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 23:57:29,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:57:29,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 23:57:29,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-03-31 23:57:29,954 INFO L87 Difference]: Start difference. First operand 892 states and 1014 transitions. Second operand has 14 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 6 states have call successors, (23), 5 states have call predecessors, (23), 7 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2023-03-31 23:57:30,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:57:30,915 INFO L93 Difference]: Finished difference Result 1616 states and 1874 transitions. [2023-03-31 23:57:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-31 23:57:30,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 6 states have call successors, (23), 5 states have call predecessors, (23), 7 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 97 [2023-03-31 23:57:30,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:57:30,918 INFO L225 Difference]: With dead ends: 1616 [2023-03-31 23:57:30,919 INFO L226 Difference]: Without dead ends: 990 [2023-03-31 23:57:30,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2023-03-31 23:57:30,921 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 173 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 23:57:30,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 440 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1439 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 23:57:30,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2023-03-31 23:57:31,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 900. [2023-03-31 23:57:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 537 states have (on average 1.2011173184357542) internal successors, (645), 587 states have internal predecessors, (645), 186 states have call successors, (186), 186 states have call predecessors, (186), 176 states have return successors, (195), 171 states have call predecessors, (195), 182 states have call successors, (195) [2023-03-31 23:57:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1026 transitions. [2023-03-31 23:57:31,033 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1026 transitions. Word has length 97 [2023-03-31 23:57:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:57:31,034 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 1026 transitions. [2023-03-31 23:57:31,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 6 states have call successors, (23), 5 states have call predecessors, (23), 7 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2023-03-31 23:57:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1026 transitions. [2023-03-31 23:57:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 23:57:31,036 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:57:31,036 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:57:31,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:57:31,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:57:31,241 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:57:31,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:57:31,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2079902814, now seen corresponding path program 1 times [2023-03-31 23:57:31,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:57:31,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304677110] [2023-03-31 23:57:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:57:31,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:57:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:57:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 23:57:31,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:57:31,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304677110] [2023-03-31 23:57:31,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304677110] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:57:31,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116569913] [2023-03-31 23:57:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:57:31,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:57:31,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:57:31,378 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:57:31,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:57:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:57:31,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 51 conjunts are in the unsatisfiable core [2023-03-31 23:57:31,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:57:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 23:57:31,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:57:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:57:32,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116569913] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:57:32,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1288446394] [2023-03-31 23:57:32,069 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2023-03-31 23:57:32,069 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:57:32,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:57:32,070 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:57:32,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:57:32,124 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-03-31 23:57:32,138 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2023-03-31 23:57:32,192 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 32 for LOIs [2023-03-31 23:57:32,197 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 24 for LOIs [2023-03-31 23:57:32,198 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 24 for LOIs [2023-03-31 23:57:32,199 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 32 for LOIs [2023-03-31 23:57:32,532 INFO L197 IcfgInterpreter]: Interpreting procedure stopSystem with input of size 36 for LOIs [2023-03-31 23:57:32,536 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 35 for LOIs [2023-03-31 23:57:32,539 INFO L197 IcfgInterpreter]: Interpreting procedure startSystem with input of size 34 for LOIs [2023-03-31 23:57:32,541 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 28 for LOIs [2023-03-31 23:57:32,575 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 26 for LOIs [2023-03-31 23:57:32,603 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 23 for LOIs [2023-03-31 23:57:32,604 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 26 for LOIs [2023-03-31 23:57:32,608 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 24 for LOIs [2023-03-31 23:57:32,609 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 24 for LOIs [2023-03-31 23:57:32,610 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment with input of size 27 for LOIs [2023-03-31 23:57:32,634 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterLevel with input of size 25 for LOIs [2023-03-31 23:57:32,647 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterSensorDry with input of size 25 for LOIs [2023-03-31 23:57:32,650 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 23 for LOIs [2023-03-31 23:57:32,651 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:57:34,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1288446394] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:57:34,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:57:34,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [7, 14, 12] total 70 [2023-03-31 23:57:34,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805047551] [2023-03-31 23:57:34,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:57:34,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-03-31 23:57:34,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:57:34,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-03-31 23:57:34,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=4391, Unknown=0, NotChecked=0, Total=4830 [2023-03-31 23:57:34,832 INFO L87 Difference]: Start difference. First operand 900 states and 1026 transitions. Second operand has 44 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 36 states have internal predecessors, (45), 16 states have call successors, (20), 11 states have call predecessors, (20), 14 states have return successors, (16), 12 states have call predecessors, (16), 14 states have call successors, (16)