/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 OctagonDomain -i ../sv-benchmarks/c/product-lines/minepump_spec4_product23.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:58:46,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:58:46,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:58:46,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:58:46,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:58:46,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:58:46,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:58:46,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:58:46,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:58:46,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:58:46,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:58:46,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:58:46,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:58:46,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:58:46,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:58:46,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:58:46,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:58:46,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:58:46,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:58:46,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:58:46,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:58:46,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:58:46,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:58:46,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:58:46,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:58:46,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:58:46,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:58:46,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:58:46,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:58:46,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:58:46,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:58:46,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:58:46,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:58:46,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:58:46,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:58:46,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:58:46,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:58:46,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:58:46,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:58:46,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:58:46,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:58:46,717 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 [2023-04-01 05:58:46,745 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:58:46,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:58:46,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:58:46,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:58:46,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:58:46,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:58:46,747 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:58:46,747 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:58:46,747 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:58:46,748 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:58:46,748 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:58:46,748 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:58:46,749 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:58:46,749 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:58:46,749 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:58:46,749 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:58:46,749 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:58:46,749 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:58:46,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:58:46,750 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:58:46,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:58:46,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:58:46,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:58:46,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:58:46,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:58:46,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:58:46,751 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:58:46,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:58:46,751 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:58:46,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:58:46,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:58:46,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:58:46,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:58:46,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:58:46,752 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:58:46,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:58:46,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:58:46,752 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:58:46,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:58:46,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:58:46,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:58:46,753 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:58:46,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:58:46,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:58:46,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:58:46,971 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:58:46,972 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:58:46,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/minepump_spec4_product23.cil.c [2023-04-01 05:58:48,122 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:58:48,381 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:58:48,381 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product23.cil.c [2023-04-01 05:58:48,396 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a07d6b4d/b258ab3a0af14ed9860beb95d90bb14b/FLAGd23da74a2 [2023-04-01 05:58:48,407 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a07d6b4d/b258ab3a0af14ed9860beb95d90bb14b [2023-04-01 05:58:48,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:58:48,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:58:48,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:58:48,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:58:48,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:58:48,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:58:48" (1/1) ... [2023-04-01 05:58:48,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c55e498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:48, skipping insertion in model container [2023-04-01 05:58:48,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:58:48" (1/1) ... [2023-04-01 05:58:48,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:58:48,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:58:48,573 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_product23.cil.c[1605,1618] [2023-04-01 05:58:48,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:58:48,680 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:58:48,702 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_product23.cil.c[1605,1618] [2023-04-01 05:58:48,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:58:48,762 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:58:48,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:48 WrapperNode [2023-04-01 05:58:48,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:58:48,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:58:48,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:58:48,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:58:48,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:48" (1/1) ... [2023-04-01 05:58:48,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:48" (1/1) ... [2023-04-01 05:58:48,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:48" (1/1) ... [2023-04-01 05:58:48,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:48" (1/1) ... [2023-04-01 05:58:48,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:48" (1/1) ... [2023-04-01 05:58:48,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:48" (1/1) ... [2023-04-01 05:58:48,838 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:48" (1/1) ... [2023-04-01 05:58:48,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:48" (1/1) ... [2023-04-01 05:58:48,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:58:48,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:58:48,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:58:48,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:58:48,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:48" (1/1) ... [2023-04-01 05:58:48,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:58:48,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:58:48,876 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) [2023-04-01 05:58:48,878 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 [2023-04-01 05:58:48,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:58:48,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:58:48,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 05:58:48,907 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:58:48,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 05:58:48,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 05:58:48,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 05:58:48,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 05:58:48,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 05:58:48,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 05:58:48,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 05:58:48,907 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2023-04-01 05:58:48,908 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-04-01 05:58:48,908 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-04-01 05:58:48,908 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-04-01 05:58:48,908 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2023-04-01 05:58:48,908 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2023-04-01 05:58:48,908 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2023-04-01 05:58:48,908 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 05:58:48,908 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 05:58:48,908 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 05:58:48,909 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 05:58:48,909 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 05:58:48,909 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 05:58:48,909 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-04-01 05:58:48,909 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2023-04-01 05:58:48,909 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2023-04-01 05:58:48,909 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2023-04-01 05:58:48,909 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-04-01 05:58:48,910 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-04-01 05:58:48,910 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-04-01 05:58:48,910 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2023-04-01 05:58:48,910 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2023-04-01 05:58:48,910 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2023-04-01 05:58:48,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2023-04-01 05:58:48,910 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 05:58:48,910 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 05:58:48,910 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 05:58:48,911 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 05:58:48,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:58:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:58:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:58:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:58:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:58:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:58:48,911 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 05:58:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 05:58:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 05:58:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 05:58:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 05:58:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 05:58:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 05:58:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:58:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 05:58:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 05:58:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:58:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 05:58:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 05:58:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:58:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 05:58:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 05:58:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 05:58:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2023-04-01 05:58:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-04-01 05:58:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-04-01 05:58:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-04-01 05:58:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2023-04-01 05:58:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2023-04-01 05:58:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2023-04-01 05:58:48,914 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 05:58:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 05:58:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 05:58:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 05:58:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2023-04-01 05:58:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 05:58:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 05:58:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 05:58:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2023-04-01 05:58:48,915 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-04-01 05:58:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-04-01 05:58:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2023-04-01 05:58:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2023-04-01 05:58:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2023-04-01 05:58:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-04-01 05:58:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2023-04-01 05:58:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2023-04-01 05:58:48,916 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-04-01 05:58:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 05:58:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 05:58:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 05:58:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:58:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:58:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:58:48,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:58:49,046 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:58:49,049 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:58:49,609 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:58:49,731 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:58:49,731 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 05:58:49,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:58:49 BoogieIcfgContainer [2023-04-01 05:58:49,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:58:49,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:58:49,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:58:49,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:58:49,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:58:48" (1/3) ... [2023-04-01 05:58:49,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766f378b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:58:49, skipping insertion in model container [2023-04-01 05:58:49,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:48" (2/3) ... [2023-04-01 05:58:49,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766f378b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:58:49, skipping insertion in model container [2023-04-01 05:58:49,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:58:49" (3/3) ... [2023-04-01 05:58:49,763 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product23.cil.c [2023-04-01 05:58:49,780 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:58:49,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:58:49,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:58:49,849 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;@2de070fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:58:49,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:58:49,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 80 states have internal predecessors, (85), 47 states have call successors, (47), 28 states have call predecessors, (47), 28 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2023-04-01 05:58:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 05:58:49,867 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:49,868 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] [2023-04-01 05:58:49,869 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:49,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:49,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1566926333, now seen corresponding path program 1 times [2023-04-01 05:58:49,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:49,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878492881] [2023-04-01 05:58:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:49,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:58:50,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:50,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878492881] [2023-04-01 05:58:50,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878492881] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:50,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:50,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:58:50,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548784272] [2023-04-01 05:58:50,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:50,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:58:50,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:50,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:58:50,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:58:50,160 INFO L87 Difference]: Start difference. First operand has 144 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 80 states have internal predecessors, (85), 47 states have call successors, (47), 28 states have call predecessors, (47), 28 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) 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) [2023-04-01 05:58:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:50,254 INFO L93 Difference]: Finished difference Result 221 states and 272 transitions. [2023-04-01 05:58:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:58:50,257 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 [2023-04-01 05:58:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:50,267 INFO L225 Difference]: With dead ends: 221 [2023-04-01 05:58:50,267 INFO L226 Difference]: Without dead ends: 111 [2023-04-01 05:58:50,271 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 [2023-04-01 05:58:50,277 INFO L413 NwaCegarLoop]: 125 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, 125 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 [2023-04-01 05:58:50,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:58:50,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-01 05:58:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-04-01 05:58:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 68 states have internal predecessors, (71), 32 states have call successors, (32), 26 states have call predecessors, (32), 21 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2023-04-01 05:58:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2023-04-01 05:58:50,315 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 42 [2023-04-01 05:58:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:50,316 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2023-04-01 05:58:50,316 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) [2023-04-01 05:58:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2023-04-01 05:58:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 05:58:50,319 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:50,319 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] [2023-04-01 05:58:50,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:58:50,319 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:50,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1474935521, now seen corresponding path program 1 times [2023-04-01 05:58:50,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:50,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649675233] [2023-04-01 05:58:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:50,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:58:50,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:50,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649675233] [2023-04-01 05:58:50,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649675233] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:50,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:50,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:58:50,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788770730] [2023-04-01 05:58:50,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:50,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:58:50,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:50,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:58:50,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:58:50,450 INFO L87 Difference]: Start difference. First operand 111 states and 130 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) [2023-04-01 05:58:50,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:50,512 INFO L93 Difference]: Finished difference Result 172 states and 200 transitions. [2023-04-01 05:58:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:58:50,513 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 [2023-04-01 05:58:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:50,514 INFO L225 Difference]: With dead ends: 172 [2023-04-01 05:58:50,514 INFO L226 Difference]: Without dead ends: 103 [2023-04-01 05:58:50,515 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 [2023-04-01 05:58:50,516 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 11 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 194 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 [2023-04-01 05:58:50,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 194 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:58:50,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-04-01 05:58:50,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-04-01 05:58:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 52 states have (on average 1.25) internal successors, (65), 63 states have internal predecessors, (65), 29 states have call successors, (29), 25 states have call predecessors, (29), 21 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-01 05:58:50,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2023-04-01 05:58:50,528 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 43 [2023-04-01 05:58:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:50,528 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2023-04-01 05:58:50,528 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) [2023-04-01 05:58:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2023-04-01 05:58:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 05:58:50,530 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:50,530 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] [2023-04-01 05:58:50,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:58:50,530 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:50,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:50,531 INFO L85 PathProgramCache]: Analyzing trace with hash 806454615, now seen corresponding path program 1 times [2023-04-01 05:58:50,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:50,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900262497] [2023-04-01 05:58:50,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:50,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:58:50,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:50,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900262497] [2023-04-01 05:58:50,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900262497] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:50,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:50,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:58:50,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528799232] [2023-04-01 05:58:50,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:50,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:58:50,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:50,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:58:50,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:58:50,690 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2023-04-01 05:58:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:51,019 INFO L93 Difference]: Finished difference Result 309 states and 370 transitions. [2023-04-01 05:58:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:58:51,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 46 [2023-04-01 05:58:51,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:51,032 INFO L225 Difference]: With dead ends: 309 [2023-04-01 05:58:51,033 INFO L226 Difference]: Without dead ends: 228 [2023-04-01 05:58:51,039 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 [2023-04-01 05:58:51,040 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 191 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:58:51,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 504 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:58:51,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-04-01 05:58:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 220. [2023-04-01 05:58:51,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 117 states have (on average 1.2820512820512822) internal successors, (150), 139 states have internal predecessors, (150), 58 states have call successors, (58), 50 states have call predecessors, (58), 44 states have return successors, (55), 42 states have call predecessors, (55), 54 states have call successors, (55) [2023-04-01 05:58:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 263 transitions. [2023-04-01 05:58:51,072 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 263 transitions. Word has length 46 [2023-04-01 05:58:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:51,073 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 263 transitions. [2023-04-01 05:58:51,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2023-04-01 05:58:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 263 transitions. [2023-04-01 05:58:51,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 05:58:51,075 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:51,075 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] [2023-04-01 05:58:51,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:58:51,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:51,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:51,076 INFO L85 PathProgramCache]: Analyzing trace with hash 13494647, now seen corresponding path program 1 times [2023-04-01 05:58:51,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:51,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563225679] [2023-04-01 05:58:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:51,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:58:51,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:51,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563225679] [2023-04-01 05:58:51,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563225679] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:51,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:51,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 05:58:51,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964766709] [2023-04-01 05:58:51,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:51,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:58:51,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:51,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:58:51,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:58:51,321 INFO L87 Difference]: Start difference. First operand 220 states and 263 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) [2023-04-01 05:58:51,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:51,683 INFO L93 Difference]: Finished difference Result 775 states and 974 transitions. [2023-04-01 05:58:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 05:58:51,684 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 [2023-04-01 05:58:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:51,691 INFO L225 Difference]: With dead ends: 775 [2023-04-01 05:58:51,691 INFO L226 Difference]: Without dead ends: 577 [2023-04-01 05:58:51,693 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 [2023-04-01 05:58:51,701 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 169 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:58:51,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 692 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:58:51,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-04-01 05:58:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 553. [2023-04-01 05:58:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 304 states have (on average 1.2861842105263157) internal successors, (391), 359 states have internal predecessors, (391), 141 states have call successors, (141), 117 states have call predecessors, (141), 107 states have return successors, (148), 101 states have call predecessors, (148), 137 states have call successors, (148) [2023-04-01 05:58:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 680 transitions. [2023-04-01 05:58:51,797 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 680 transitions. Word has length 51 [2023-04-01 05:58:51,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:51,799 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 680 transitions. [2023-04-01 05:58:51,799 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) [2023-04-01 05:58:51,799 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 680 transitions. [2023-04-01 05:58:51,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 05:58:51,808 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:51,808 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, 1, 1, 1] [2023-04-01 05:58:51,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 05:58:51,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:51,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:51,809 INFO L85 PathProgramCache]: Analyzing trace with hash 253608926, now seen corresponding path program 1 times [2023-04-01 05:58:51,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:51,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163874947] [2023-04-01 05:58:51,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:51,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:58:51,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:51,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163874947] [2023-04-01 05:58:51,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163874947] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:51,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:51,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:58:51,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368149500] [2023-04-01 05:58:51,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:51,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:58:51,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:51,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:58:51,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:58:51,928 INFO L87 Difference]: Start difference. First operand 553 states and 680 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-04-01 05:58:52,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:52,041 INFO L93 Difference]: Finished difference Result 916 states and 1165 transitions. [2023-04-01 05:58:52,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:58:52,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 57 [2023-04-01 05:58:52,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:52,045 INFO L225 Difference]: With dead ends: 916 [2023-04-01 05:58:52,045 INFO L226 Difference]: Without dead ends: 385 [2023-04-01 05:58:52,046 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 [2023-04-01 05:58:52,047 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 78 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:58:52,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 40 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:58:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-04-01 05:58:52,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 373. [2023-04-01 05:58:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 226 states have (on average 1.1991150442477876) internal successors, (271), 245 states have internal predecessors, (271), 75 states have call successors, (75), 75 states have call predecessors, (75), 71 states have return successors, (74), 71 states have call predecessors, (74), 71 states have call successors, (74) [2023-04-01 05:58:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 420 transitions. [2023-04-01 05:58:52,088 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 420 transitions. Word has length 57 [2023-04-01 05:58:52,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:52,089 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 420 transitions. [2023-04-01 05:58:52,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-04-01 05:58:52,089 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 420 transitions. [2023-04-01 05:58:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 05:58:52,092 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:52,092 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] [2023-04-01 05:58:52,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 05:58:52,093 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:52,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:52,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1977222167, now seen corresponding path program 1 times [2023-04-01 05:58:52,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:52,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001538154] [2023-04-01 05:58:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:52,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 05:58:52,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:52,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001538154] [2023-04-01 05:58:52,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001538154] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:58:52,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554571657] [2023-04-01 05:58:52,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:52,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:58:52,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:58:52,331 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) [2023-04-01 05:58:52,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:58:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:52,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 05:58:52,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:58:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 05:58:52,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:58:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:58:53,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554571657] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:58:53,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [913418647] [2023-04-01 05:58:53,390 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2023-04-01 05:58:53,390 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:58:53,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:58:53,398 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:58:53,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:58:53,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 05:58:53,679 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2023-04-01 05:58:53,844 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 32 for LOIs [2023-04-01 05:58:53,859 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 24 for LOIs [2023-04-01 05:58:53,862 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 24 for LOIs [2023-04-01 05:58:53,864 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 32 for LOIs [2023-04-01 05:58:58,956 INFO L197 IcfgInterpreter]: Interpreting procedure stopSystem with input of size 37 for LOIs [2023-04-01 05:58:58,966 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 36 for LOIs [2023-04-01 05:58:58,972 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 28 for LOIs [2023-04-01 05:58:59,086 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 22 for LOIs [2023-04-01 05:58:59,127 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 24 for LOIs [2023-04-01 05:58:59,131 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 22 for LOIs [2023-04-01 05:58:59,133 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 24 for LOIs [2023-04-01 05:58:59,135 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 24 for LOIs [2023-04-01 05:58:59,137 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:59:01,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [913418647] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:59:01,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:59:01,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [7, 14, 12] total 61 [2023-04-01 05:59:01,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831751329] [2023-04-01 05:59:01,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:59:01,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 05:59:01,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:59:01,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 05:59:01,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=3267, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 05:59:01,653 INFO L87 Difference]: Start difference. First operand 373 states and 420 transitions. Second operand has 35 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 28 states have internal predecessors, (34), 11 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-01 05:59:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:59:12,630 INFO L93 Difference]: Finished difference Result 947 states and 1140 transitions. [2023-04-01 05:59:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-04-01 05:59:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 28 states have internal predecessors, (34), 11 states have call successors, (15), 9 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 78 [2023-04-01 05:59:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:59:12,636 INFO L225 Difference]: With dead ends: 947 [2023-04-01 05:59:12,637 INFO L226 Difference]: Without dead ends: 721 [2023-04-01 05:59:12,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 184 SyntacticMatches, 4 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3975 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1892, Invalid=11914, Unknown=0, NotChecked=0, Total=13806 [2023-04-01 05:59:12,642 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 649 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 3591 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 4023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 3591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:59:12,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 283 Invalid, 4023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 3591 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 05:59:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2023-04-01 05:59:12,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 573. [2023-04-01 05:59:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 356 states have (on average 1.199438202247191) internal successors, (427), 382 states have internal predecessors, (427), 110 states have call successors, (110), 110 states have call predecessors, (110), 106 states have return successors, (109), 106 states have call predecessors, (109), 106 states have call successors, (109) [2023-04-01 05:59:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 646 transitions. [2023-04-01 05:59:12,725 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 646 transitions. Word has length 78 [2023-04-01 05:59:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:59:12,725 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 646 transitions. [2023-04-01 05:59:12,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 28 states have internal predecessors, (34), 11 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-01 05:59:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 646 transitions. [2023-04-01 05:59:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 05:59:12,727 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:59:12,727 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] [2023-04-01 05:59:12,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:59:12,933 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 [2023-04-01 05:59:12,934 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:59:12,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:59:12,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1880618401, now seen corresponding path program 1 times [2023-04-01 05:59:12,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:59:12,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795734526] [2023-04-01 05:59:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:59:12,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:59:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:59:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 05:59:13,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:59:13,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795734526] [2023-04-01 05:59:13,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795734526] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:59:13,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598278562] [2023-04-01 05:59:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:59:13,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:59:13,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:59:13,091 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) [2023-04-01 05:59:13,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:59:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:59:13,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 05:59:13,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:59:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 05:59:13,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:59:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:59:13,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598278562] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:59:13,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [92387313] [2023-04-01 05:59:13,877 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2023-04-01 05:59:13,877 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:59:13,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:59:13,878 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:59:13,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:59:13,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 05:59:13,999 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2023-04-01 05:59:14,117 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 32 for LOIs [2023-04-01 05:59:14,128 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 24 for LOIs [2023-04-01 05:59:14,130 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 24 for LOIs [2023-04-01 05:59:14,132 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 32 for LOIs [2023-04-01 05:59:19,566 INFO L197 IcfgInterpreter]: Interpreting procedure stopSystem with input of size 49 for LOIs [2023-04-01 05:59:19,585 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 40 for LOIs [2023-04-01 05:59:19,591 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 32 for LOIs [2023-04-01 05:59:19,681 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 24 for LOIs [2023-04-01 05:59:19,716 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 26 for LOIs [2023-04-01 05:59:19,719 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 24 for LOIs [2023-04-01 05:59:19,721 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 39 for LOIs [2023-04-01 05:59:19,726 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 24 for LOIs [2023-04-01 05:59:19,729 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 24 for LOIs [2023-04-01 05:59:19,730 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:59:23,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [92387313] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:59:23,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:59:23,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [7, 14, 12] total 65 [2023-04-01 05:59:23,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739515096] [2023-04-01 05:59:23,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:59:23,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-01 05:59:23,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:59:23,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-01 05:59:23,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=3741, Unknown=0, NotChecked=0, Total=4160 [2023-04-01 05:59:23,588 INFO L87 Difference]: Start difference. First operand 573 states and 646 transitions. Second operand has 39 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 12 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12)