/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 EqDomain -i ../sv-benchmarks/c/product-lines/minepump_spec4_product51.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:06:56,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:06:56,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:06:56,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:06:56,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:06:56,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:06:56,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:06:56,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:06:56,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:06:56,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:06:56,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:06:56,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:06:56,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:06:56,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:06:56,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:06:56,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:06:56,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:06:56,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:06:56,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:06:56,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:06:56,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:06:56,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:06:56,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:06:56,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:06:56,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:06:56,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:06:56,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:06:56,506 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:06:56,506 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:06:56,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:06:56,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:06:56,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:06:56,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:06:56,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:06:56,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:06:56,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:06:56,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:06:56,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:06:56,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:06:56,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:06:56,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:06:56,514 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 12:06:56,544 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:06:56,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:06:56,544 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:06:56,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:06:56,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:06:56,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:06:56,546 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:06:56,546 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:06:56,546 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:06:56,546 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:06:56,547 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:06:56,547 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:06:56,547 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:06:56,547 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:06:56,547 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:06:56,547 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:06:56,547 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:06:56,547 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:06:56,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:06:56,548 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:06:56,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:06:56,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:06:56,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:06:56,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:06:56,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:06:56,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:06:56,549 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:06:56,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:06:56,549 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:06:56,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:06:56,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:06:56,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:06:56,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:06:56,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:06:56,550 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:06:56,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:06:56,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:06:56,550 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:06:56,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:06:56,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:06:56,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:06:56,551 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:06:56,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:06:56,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:06:56,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:06:56,841 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:06:56,841 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:06:56,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/minepump_spec4_product51.cil.c [2023-04-01 12:06:57,989 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:06:58,216 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:06:58,217 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product51.cil.c [2023-04-01 12:06:58,227 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bf6b4a8e/33fc6e5689ef4cd1b0d68d45b2e3ac61/FLAG3b69b9037 [2023-04-01 12:06:58,239 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bf6b4a8e/33fc6e5689ef4cd1b0d68d45b2e3ac61 [2023-04-01 12:06:58,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:06:58,242 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:06:58,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:06:58,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:06:58,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:06:58,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:06:58" (1/1) ... [2023-04-01 12:06:58,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2412a5e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58, skipping insertion in model container [2023-04-01 12:06:58,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:06:58" (1/1) ... [2023-04-01 12:06:58,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:06:58,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:06:58,526 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_product51.cil.c[8940,8953] [2023-04-01 12:06:58,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:06:58,610 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:06:58,643 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_product51.cil.c[8940,8953] [2023-04-01 12:06:58,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:06:58,705 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:06:58,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58 WrapperNode [2023-04-01 12:06:58,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:06:58,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:06:58,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:06:58,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:06:58,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 12:06:58,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 12:06:58,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 12:06:58,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 12:06:58,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 12:06:58,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 12:06:58,768 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 12:06:58,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 12:06:58,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:06:58,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:06:58,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:06:58,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:06:58,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (1/1) ... [2023-04-01 12:06:58,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:06:58,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:06:58,818 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 12:06:58,829 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 12:06:58,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:06:58,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:06:58,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 12:06:58,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:06:58,860 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 12:06:58,860 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 12:06:58,860 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 12:06:58,860 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 12:06:58,861 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:06:58,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2023-04-01 12:06:58,861 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2023-04-01 12:06:58,861 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-04-01 12:06:58,861 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-04-01 12:06:58,861 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-04-01 12:06:58,861 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2023-04-01 12:06:58,861 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2023-04-01 12:06:58,862 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2023-04-01 12:06:58,862 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2023-04-01 12:06:58,862 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 12:06:58,862 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 12:06:58,862 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 12:06:58,863 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 12:06:58,863 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 12:06:58,863 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-04-01 12:06:58,863 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-04-01 12:06:58,863 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2023-04-01 12:06:58,863 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2023-04-01 12:06:58,863 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-04-01 12:06:58,863 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-04-01 12:06:58,864 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-04-01 12:06:58,864 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2023-04-01 12:06:58,864 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2023-04-01 12:06:58,864 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2023-04-01 12:06:58,864 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2023-04-01 12:06:58,864 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 12:06:58,864 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 12:06:58,864 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 12:06:58,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 12:06:58,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 12:06:58,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 12:06:58,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 12:06:58,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 12:06:58,865 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:06:58,866 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:06:58,866 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:06:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:06:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 12:06:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 12:06:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 12:06:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 12:06:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2023-04-01 12:06:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-04-01 12:06:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-04-01 12:06:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 12:06:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 12:06:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 12:06:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 12:06:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 12:06:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 12:06:58,871 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 12:06:58,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:06:58,871 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 12:06:58,871 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-04-01 12:06:58,871 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2023-04-01 12:06:58,871 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2023-04-01 12:06:58,871 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2023-04-01 12:06:58,871 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-04-01 12:06:58,872 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2023-04-01 12:06:58,872 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2023-04-01 12:06:58,872 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2023-04-01 12:06:58,872 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 12:06:58,872 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2023-04-01 12:06:58,872 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-04-01 12:06:58,872 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2023-04-01 12:06:58,872 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2023-04-01 12:06:58,873 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-04-01 12:06:58,873 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2023-04-01 12:06:58,873 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-04-01 12:06:58,873 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2023-04-01 12:06:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-04-01 12:06:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 12:06:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 12:06:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 12:06:58,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 12:06:58,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 12:06:58,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:06:58,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 12:06:58,876 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 12:06:58,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:06:58,876 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 12:06:58,876 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 12:06:58,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:06:58,876 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 12:06:58,876 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 12:06:58,877 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 12:06:58,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:06:58,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:06:58,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:06:59,054 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:06:59,056 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:06:59,595 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:06:59,734 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:06:59,734 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 12:06:59,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:06:59 BoogieIcfgContainer [2023-04-01 12:06:59,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:06:59,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:06:59,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:06:59,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:06:59,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:06:58" (1/3) ... [2023-04-01 12:06:59,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112179d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:06:59, skipping insertion in model container [2023-04-01 12:06:59,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:58" (2/3) ... [2023-04-01 12:06:59,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112179d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:06:59, skipping insertion in model container [2023-04-01 12:06:59,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:06:59" (3/3) ... [2023-04-01 12:06:59,747 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product51.cil.c [2023-04-01 12:06:59,762 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:06:59,762 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:06:59,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:06:59,813 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;@1abacd56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:06:59,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:06:59,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 146 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 81 states have internal predecessors, (86), 47 states have call successors, (47), 29 states have call predecessors, (47), 29 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2023-04-01 12:06:59,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 12:06:59,827 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:06:59,830 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 12:06:59,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:06:59,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:06:59,836 INFO L85 PathProgramCache]: Analyzing trace with hash 201203862, now seen corresponding path program 1 times [2023-04-01 12:06:59,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:06:59,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500242200] [2023-04-01 12:06:59,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:06:59,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:06:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:07:00,070 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 12:07:00,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:07:00,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500242200] [2023-04-01 12:07:00,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500242200] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:07:00,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:07:00,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 12:07:00,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659911783] [2023-04-01 12:07:00,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:07:00,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 12:07:00,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:07:00,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 12:07:00,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 12:07:00,119 INFO L87 Difference]: Start difference. First operand has 146 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 81 states have internal predecessors, (86), 47 states have call successors, (47), 29 states have call predecessors, (47), 29 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 12:07:00,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:07:00,203 INFO L93 Difference]: Finished difference Result 225 states and 274 transitions. [2023-04-01 12:07:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 12:07:00,205 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 12:07:00,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:07:00,214 INFO L225 Difference]: With dead ends: 225 [2023-04-01 12:07:00,214 INFO L226 Difference]: Without dead ends: 113 [2023-04-01 12:07:00,220 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 12:07:00,224 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:07:00,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:07:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-01 12:07:00,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-04-01 12:07:00,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 69 states have internal predecessors, (72), 32 states have call successors, (32), 27 states have call predecessors, (32), 22 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2023-04-01 12:07:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2023-04-01 12:07:00,262 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 42 [2023-04-01 12:07:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:07:00,262 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2023-04-01 12:07:00,262 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 12:07:00,262 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2023-04-01 12:07:00,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 12:07:00,265 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:07:00,265 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 12:07:00,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:07:00,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:07:00,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:07:00,266 INFO L85 PathProgramCache]: Analyzing trace with hash -324995353, now seen corresponding path program 1 times [2023-04-01 12:07:00,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:07:00,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337797986] [2023-04-01 12:07:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:07:00,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:07:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:07:00,368 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 12:07:00,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:07:00,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337797986] [2023-04-01 12:07:00,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337797986] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:07:00,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:07:00,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:07:00,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064339370] [2023-04-01 12:07:00,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:07:00,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:07:00,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:07:00,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:07:00,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:07:00,373 INFO L87 Difference]: Start difference. First operand 113 states and 131 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 12:07:00,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:07:00,432 INFO L93 Difference]: Finished difference Result 176 states and 202 transitions. [2023-04-01 12:07:00,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:07:00,433 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 12:07:00,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:07:00,434 INFO L225 Difference]: With dead ends: 176 [2023-04-01 12:07:00,434 INFO L226 Difference]: Without dead ends: 105 [2023-04-01 12:07:00,435 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 12:07:00,436 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 11 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:07:00,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 194 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:07:00,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-01 12:07:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-04-01 12:07:00,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 64 states have internal predecessors, (66), 29 states have call successors, (29), 26 states have call predecessors, (29), 22 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-01 12:07:00,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2023-04-01 12:07:00,449 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 43 [2023-04-01 12:07:00,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:07:00,449 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2023-04-01 12:07:00,450 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 12:07:00,450 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2023-04-01 12:07:00,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 12:07:00,451 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:07:00,451 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 12:07:00,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:07:00,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:07:00,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:07:00,452 INFO L85 PathProgramCache]: Analyzing trace with hash 99836001, now seen corresponding path program 1 times [2023-04-01 12:07:00,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:07:00,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165055528] [2023-04-01 12:07:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:07:00,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:07:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:07:00,783 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 12:07:00,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:07:00,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165055528] [2023-04-01 12:07:00,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165055528] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:07:00,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:07:00,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:07:00,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239168688] [2023-04-01 12:07:00,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:07:00,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:07:00,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:07:00,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:07:00,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:07:00,787 INFO L87 Difference]: Start difference. First operand 105 states and 120 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 12:07:01,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:07:01,099 INFO L93 Difference]: Finished difference Result 315 states and 373 transitions. [2023-04-01 12:07:01,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:07:01,100 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 12:07:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:07:01,103 INFO L225 Difference]: With dead ends: 315 [2023-04-01 12:07:01,103 INFO L226 Difference]: Without dead ends: 232 [2023-04-01 12:07:01,104 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 12:07:01,105 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 245 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:07:01,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 459 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:07:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-04-01 12:07:01,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2023-04-01 12:07:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 119 states have (on average 1.2773109243697478) internal successors, (152), 141 states have internal predecessors, (152), 58 states have call successors, (58), 52 states have call predecessors, (58), 46 states have return successors, (55), 42 states have call predecessors, (55), 54 states have call successors, (55) [2023-04-01 12:07:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 265 transitions. [2023-04-01 12:07:01,156 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 265 transitions. Word has length 46 [2023-04-01 12:07:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:07:01,156 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 265 transitions. [2023-04-01 12:07:01,157 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 12:07:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 265 transitions. [2023-04-01 12:07:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 12:07:01,158 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:07:01,158 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 12:07:01,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:07:01,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:07:01,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:07:01,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1665953342, now seen corresponding path program 1 times [2023-04-01 12:07:01,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:07:01,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547202521] [2023-04-01 12:07:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:07:01,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:07:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:07:01,305 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 12:07:01,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:07:01,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547202521] [2023-04-01 12:07:01,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547202521] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:07:01,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:07:01,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:07:01,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809634363] [2023-04-01 12:07:01,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:07:01,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:07:01,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:07:01,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:07:01,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:07:01,308 INFO L87 Difference]: Start difference. First operand 224 states and 265 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 12:07:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:07:01,476 INFO L93 Difference]: Finished difference Result 610 states and 748 transitions. [2023-04-01 12:07:01,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 12:07:01,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2023-04-01 12:07:01,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:07:01,485 INFO L225 Difference]: With dead ends: 610 [2023-04-01 12:07:01,485 INFO L226 Difference]: Without dead ends: 408 [2023-04-01 12:07:01,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:07:01,496 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 80 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:07:01,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 447 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:07:01,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-04-01 12:07:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 390. [2023-04-01 12:07:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 213 states have (on average 1.2816901408450705) internal successors, (273), 250 states have internal predecessors, (273), 98 states have call successors, (98), 86 states have call predecessors, (98), 78 states have return successors, (100), 70 states have call predecessors, (100), 94 states have call successors, (100) [2023-04-01 12:07:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 471 transitions. [2023-04-01 12:07:01,542 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 471 transitions. Word has length 51 [2023-04-01 12:07:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:07:01,542 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 471 transitions. [2023-04-01 12:07:01,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 12:07:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 471 transitions. [2023-04-01 12:07:01,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 12:07:01,548 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:07:01,548 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] [2023-04-01 12:07:01,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:07:01,548 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:07:01,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:07:01,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1252377784, now seen corresponding path program 1 times [2023-04-01 12:07:01,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:07:01,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920172538] [2023-04-01 12:07:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:07:01,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:07:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:07:01,721 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 12:07:01,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:07:01,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920172538] [2023-04-01 12:07:01,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920172538] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:07:01,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:07:01,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:07:01,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031767224] [2023-04-01 12:07:01,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:07:01,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:07:01,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:07:01,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:07:01,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:07:01,723 INFO L87 Difference]: Start difference. First operand 390 states and 471 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 12:07:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:07:02,116 INFO L93 Difference]: Finished difference Result 984 states and 1305 transitions. [2023-04-01 12:07:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 12:07:02,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2023-04-01 12:07:02,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:07:02,121 INFO L225 Difference]: With dead ends: 984 [2023-04-01 12:07:02,121 INFO L226 Difference]: Without dead ends: 616 [2023-04-01 12:07:02,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:07:02,126 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 137 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:07:02,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 258 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:07:02,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2023-04-01 12:07:02,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 524. [2023-04-01 12:07:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 302 states have (on average 1.218543046357616) internal successors, (368), 327 states have internal predecessors, (368), 109 states have call successors, (109), 103 states have call predecessors, (109), 112 states have return successors, (150), 111 states have call predecessors, (150), 105 states have call successors, (150) [2023-04-01 12:07:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 627 transitions. [2023-04-01 12:07:02,192 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 627 transitions. Word has length 54 [2023-04-01 12:07:02,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:07:02,193 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 627 transitions. [2023-04-01 12:07:02,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 12:07:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 627 transitions. [2023-04-01 12:07:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 12:07:02,197 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:07:02,197 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:07:02,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:07:02,198 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:07:02,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:07:02,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1728776847, now seen corresponding path program 1 times [2023-04-01 12:07:02,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:07:02,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662602637] [2023-04-01 12:07:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:07:02,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:07:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:07:02,534 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 12:07:02,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:07:02,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662602637] [2023-04-01 12:07:02,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662602637] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:07:02,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:07:02,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-04-01 12:07:02,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775655436] [2023-04-01 12:07:02,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:07:02,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 12:07:02,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:07:02,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 12:07:02,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:07:02,537 INFO L87 Difference]: Start difference. First operand 524 states and 627 transitions. Second operand has 14 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-01 12:07:02,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:07:02,853 INFO L93 Difference]: Finished difference Result 1035 states and 1283 transitions. [2023-04-01 12:07:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 12:07:02,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2023-04-01 12:07:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:07:02,858 INFO L225 Difference]: With dead ends: 1035 [2023-04-01 12:07:02,858 INFO L226 Difference]: Without dead ends: 725 [2023-04-01 12:07:02,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:07:02,860 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 127 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:07:02,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1048 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:07:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2023-04-01 12:07:02,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 696. [2023-04-01 12:07:02,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 412 states have (on average 1.2233009708737863) internal successors, (504), 442 states have internal predecessors, (504), 140 states have call successors, (140), 136 states have call predecessors, (140), 143 states have return successors, (198), 141 states have call predecessors, (198), 136 states have call successors, (198) [2023-04-01 12:07:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 842 transitions. [2023-04-01 12:07:02,931 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 842 transitions. Word has length 71 [2023-04-01 12:07:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:07:02,937 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 842 transitions. [2023-04-01 12:07:02,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-01 12:07:02,938 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 842 transitions. [2023-04-01 12:07:02,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-01 12:07:02,942 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:07:02,942 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:07:02,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:07:02,943 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:07:02,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:07:02,943 INFO L85 PathProgramCache]: Analyzing trace with hash -190333464, now seen corresponding path program 1 times [2023-04-01 12:07:02,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:07:02,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441202764] [2023-04-01 12:07:02,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:07:02,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:07:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:07:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 12:07:03,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:07:03,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441202764] [2023-04-01 12:07:03,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441202764] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:07:03,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718808850] [2023-04-01 12:07:03,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:07:03,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:07:03,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:07:03,453 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 12:07:03,476 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 12:07:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:07:03,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 12:07:03,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:07:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 12:07:04,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:07:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 12:07:04,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718808850] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:07:04,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1321142931] [2023-04-01 12:07:04,921 INFO L159 IcfgInterpreter]: Started Sifa with 92 locations of interest [2023-04-01 12:07:04,921 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:07:04,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:07:04,929 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:07:04,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:07:05,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 12:07:05,446 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 127 for LOIs [2023-04-01 12:07:07,308 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 127 for LOIs [2023-04-01 12:07:07,363 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 119 for LOIs [2023-04-01 12:07:07,407 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 119 for LOIs [2023-04-01 12:07:07,427 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 127 for LOIs [2023-04-01 12:07:12,251 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 120 for LOIs [2023-04-01 12:07:12,276 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 136 for LOIs [2023-04-01 12:07:13,389 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 118 for LOIs [2023-04-01 12:07:13,828 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 120 for LOIs [2023-04-01 12:07:13,847 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 125 for LOIs [2023-04-01 12:07:13,867 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 118 for LOIs [2023-04-01 12:07:13,885 INFO L197 IcfgInterpreter]: Interpreting procedure lowerWaterLevel with input of size 136 for LOIs [2023-04-01 12:07:13,955 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 119 for LOIs [2023-04-01 12:07:13,972 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 119 for LOIs [2023-04-01 12:07:13,987 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment with input of size 118 for LOIs [2023-04-01 12:07:14,878 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 123 for LOIs [2023-04-01 12:07:15,805 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterLevel with input of size 117 for LOIs [2023-04-01 12:07:16,135 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterSensorDry with input of size 117 for LOIs [2023-04-01 12:07:16,164 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump with input of size 129 for LOIs [2023-04-01 12:07:16,187 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 118 for LOIs [2023-04-01 12:07:16,203 INFO L197 IcfgInterpreter]: Interpreting procedure isLowWaterLevel with input of size 118 for LOIs [2023-04-01 12:07:16,548 INFO L197 IcfgInterpreter]: Interpreting procedure isLowWaterSensorDry with input of size 118 for LOIs [2023-04-01 12:07:16,570 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 12:07:34,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8807#(and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= 30 (select |#length| 7)) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= (select |#valid| 9) 1) (not (= ~pumpRunning~0 0)) (= (select |#length| 12) 25) (<= ~pumpRunning~0 2147483647) (= (select |#valid| 11) 1) (= ~methaneLevelCritical~0 0) (= 30 (select |#length| 4)) (= 31 (select |#length| 2)) (= ~head~0.offset 0) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= 30 (select |#length| 13)) (= 1 ~systemActive~0) (= 30 (select |#length| 10)) (= (select |#valid| 12) 1) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= (select |#length| 6) 21) (= (select |#valid| 14) 1) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (= ~head~0.base 0) (= (select |#valid| 2) 1) (<= 0 (+ ~pumpRunning~0 2147483648)) (= |#NULL.offset| 0) (= 9 (select |#length| 11)) (= (select (select |#memory_int| 1) 0) 48) (= ~waterLevel~0 0) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 1) 1) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= (select |#valid| 13) 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2023-04-01 12:07:34,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 12:07:34,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 12:07:34,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 17] total 33 [2023-04-01 12:07:34,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065720602] [2023-04-01 12:07:34,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 12:07:34,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 12:07:34,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:07:34,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 12:07:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=6360, Unknown=0, NotChecked=0, Total=6972 [2023-04-01 12:07:34,230 INFO L87 Difference]: Start difference. First operand 696 states and 842 transitions. Second operand has 33 states, 22 states have (on average 5.681818181818182) internal successors, (125), 27 states have internal predecessors, (125), 10 states have call successors, (56), 11 states have call predecessors, (56), 18 states have return successors, (50), 16 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-01 12:07:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:07:37,937 INFO L93 Difference]: Finished difference Result 4356 states and 6684 transitions. [2023-04-01 12:07:37,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-04-01 12:07:37,940 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 22 states have (on average 5.681818181818182) internal successors, (125), 27 states have internal predecessors, (125), 10 states have call successors, (56), 11 states have call predecessors, (56), 18 states have return successors, (50), 16 states have call predecessors, (50), 10 states have call successors, (50) Word has length 117 [2023-04-01 12:07:37,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:07:37,963 INFO L225 Difference]: With dead ends: 4356 [2023-04-01 12:07:37,964 INFO L226 Difference]: Without dead ends: 3852 [2023-04-01 12:07:37,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6980 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=1563, Invalid=15467, Unknown=0, NotChecked=0, Total=17030 [2023-04-01 12:07:37,974 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 1197 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 3505 mSolverCounterSat, 855 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 4360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 855 IncrementalHoareTripleChecker+Valid, 3505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:07:37,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1239 Valid, 1528 Invalid, 4360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [855 Valid, 3505 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 12:07:37,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3852 states. [2023-04-01 12:07:38,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3852 to 2199. [2023-04-01 12:07:38,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 1292 states have (on average 1.2182662538699691) internal successors, (1574), 1388 states have internal predecessors, (1574), 449 states have call successors, (449), 421 states have call predecessors, (449), 457 states have return successors, (690), 458 states have call predecessors, (690), 445 states have call successors, (690) [2023-04-01 12:07:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 2713 transitions. [2023-04-01 12:07:38,224 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 2713 transitions. Word has length 117 [2023-04-01 12:07:38,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:07:38,225 INFO L495 AbstractCegarLoop]: Abstraction has 2199 states and 2713 transitions. [2023-04-01 12:07:38,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 22 states have (on average 5.681818181818182) internal successors, (125), 27 states have internal predecessors, (125), 10 states have call successors, (56), 11 states have call predecessors, (56), 18 states have return successors, (50), 16 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-01 12:07:38,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 2713 transitions. [2023-04-01 12:07:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 12:07:38,232 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:07:38,233 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:07:38,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 12:07:38,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:07:38,440 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:07:38,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:07:38,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1852310622, now seen corresponding path program 1 times [2023-04-01 12:07:38,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:07:38,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122551640] [2023-04-01 12:07:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:07:38,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:07:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:07:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 12:07:38,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:07:38,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122551640] [2023-04-01 12:07:38,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122551640] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:07:38,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174736190] [2023-04-01 12:07:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:07:38,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:07:38,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:07:38,939 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 12:07:38,942 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 12:07:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:07:39,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 12:07:39,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:07:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:07:39,322 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:07:39,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174736190] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:07:39,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:07:39,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 22 [2023-04-01 12:07:39,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061967653] [2023-04-01 12:07:39,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:07:39,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 12:07:39,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:07:39,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 12:07:39,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:07:39,326 INFO L87 Difference]: Start difference. First operand 2199 states and 2713 transitions. Second operand has 14 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 6 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2023-04-01 12:07:40,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:07:40,484 INFO L93 Difference]: Finished difference Result 4979 states and 6281 transitions. [2023-04-01 12:07:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 12:07:40,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 6 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 114 [2023-04-01 12:07:40,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:07:40,499 INFO L225 Difference]: With dead ends: 4979 [2023-04-01 12:07:40,500 INFO L226 Difference]: Without dead ends: 2798 [2023-04-01 12:07:40,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=1420, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 12:07:40,508 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 220 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:07:40,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 372 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:07:40,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2023-04-01 12:07:40,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2726. [2023-04-01 12:07:40,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2726 states, 1633 states have (on average 1.2082057562767912) internal successors, (1973), 1746 states have internal predecessors, (1973), 568 states have call successors, (568), 540 states have call predecessors, (568), 524 states have return successors, (831), 532 states have call predecessors, (831), 564 states have call successors, (831) [2023-04-01 12:07:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2726 states to 2726 states and 3372 transitions. [2023-04-01 12:07:40,734 INFO L78 Accepts]: Start accepts. Automaton has 2726 states and 3372 transitions. Word has length 114 [2023-04-01 12:07:40,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:07:40,736 INFO L495 AbstractCegarLoop]: Abstraction has 2726 states and 3372 transitions. [2023-04-01 12:07:40,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 6 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2023-04-01 12:07:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2726 states and 3372 transitions. [2023-04-01 12:07:40,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-01 12:07:40,741 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:07:40,741 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 12:07:40,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 12:07:40,948 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,SelfDestructingSolverStorable7 [2023-04-01 12:07:40,948 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:07:40,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:07:40,949 INFO L85 PathProgramCache]: Analyzing trace with hash -201170050, now seen corresponding path program 2 times [2023-04-01 12:07:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:07:40,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125730977] [2023-04-01 12:07:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:07:40,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:07:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:07:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-01 12:07:41,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:07:41,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125730977] [2023-04-01 12:07:41,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125730977] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:07:41,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545362946] [2023-04-01 12:07:41,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 12:07:41,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:07:41,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:07:41,197 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) [2023-04-01 12:07:41,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 12:07:41,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 12:07:41,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 12:07:41,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 12:07:41,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:07:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 12:07:41,359 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:07:41,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545362946] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:07:41,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:07:41,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 9 [2023-04-01 12:07:41,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766209355] [2023-04-01 12:07:41,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:07:41,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:07:41,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:07:41,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:07:41,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:07:41,361 INFO L87 Difference]: Start difference. First operand 2726 states and 3372 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 4 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-01 12:07:41,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:07:41,836 INFO L93 Difference]: Finished difference Result 5309 states and 6656 transitions. [2023-04-01 12:07:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:07:41,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 4 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 163 [2023-04-01 12:07:41,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:07:41,850 INFO L225 Difference]: With dead ends: 5309 [2023-04-01 12:07:41,850 INFO L226 Difference]: Without dead ends: 2728 [2023-04-01 12:07:41,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:07:41,860 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 188 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:07:41,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 186 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:07:41,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2023-04-01 12:07:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2550. [2023-04-01 12:07:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 1543 states have (on average 1.187945560596241) internal successors, (1833), 1653 states have internal predecessors, (1833), 513 states have call successors, (513), 505 states have call predecessors, (513), 493 states have return successors, (614), 484 states have call predecessors, (614), 509 states have call successors, (614) [2023-04-01 12:07:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 2960 transitions. [2023-04-01 12:07:42,072 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 2960 transitions. Word has length 163 [2023-04-01 12:07:42,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:07:42,073 INFO L495 AbstractCegarLoop]: Abstraction has 2550 states and 2960 transitions. [2023-04-01 12:07:42,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 4 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-04-01 12:07:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 2960 transitions. [2023-04-01 12:07:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-01 12:07:42,076 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:07:42,076 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 12:07:42,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 12:07:42,286 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 [2023-04-01 12:07:42,287 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:07:42,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:07:42,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1366982017, now seen corresponding path program 3 times [2023-04-01 12:07:42,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:07:42,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071008263] [2023-04-01 12:07:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:07:42,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:07:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:07:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 35 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 12:07:43,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:07:43,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071008263] [2023-04-01 12:07:43,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071008263] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:07:43,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400691750] [2023-04-01 12:07:43,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 12:07:43,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:07:43,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:07:43,009 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) [2023-04-01 12:07:43,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 12:07:43,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 12:07:43,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 12:07:43,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 12:07:43,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:07:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 12:07:43,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:07:43,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400691750] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:07:43,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:07:43,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 26 [2023-04-01 12:07:43,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910707843] [2023-04-01 12:07:43,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:07:43,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:07:43,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:07:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:07:43,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2023-04-01 12:07:43,419 INFO L87 Difference]: Start difference. First operand 2550 states and 2960 transitions. Second operand has 11 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (35), 3 states have call predecessors, (35), 6 states have return successors, (31), 6 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-01 12:07:44,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:07:44,055 INFO L93 Difference]: Finished difference Result 5190 states and 6048 transitions. [2023-04-01 12:07:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 12:07:44,055 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (35), 3 states have call predecessors, (35), 6 states have return successors, (31), 6 states have call predecessors, (31), 3 states have call successors, (31) Word has length 163 [2023-04-01 12:07:44,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:07:44,070 INFO L225 Difference]: With dead ends: 5190 [2023-04-01 12:07:44,070 INFO L226 Difference]: Without dead ends: 2689 [2023-04-01 12:07:44,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-04-01 12:07:44,079 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 73 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:07:44,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1293 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:07:44,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2023-04-01 12:07:44,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 2574. [2023-04-01 12:07:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2574 states, 1558 states have (on average 1.1777920410783056) internal successors, (1835), 1662 states have internal predecessors, (1835), 517 states have call successors, (517), 513 states have call predecessors, (517), 498 states have return successors, (611), 487 states have call predecessors, (611), 513 states have call successors, (611) [2023-04-01 12:07:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2574 states to 2574 states and 2963 transitions. [2023-04-01 12:07:44,283 INFO L78 Accepts]: Start accepts. Automaton has 2574 states and 2963 transitions. Word has length 163 [2023-04-01 12:07:44,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:07:44,284 INFO L495 AbstractCegarLoop]: Abstraction has 2574 states and 2963 transitions. [2023-04-01 12:07:44,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 3 states have call successors, (35), 3 states have call predecessors, (35), 6 states have return successors, (31), 6 states have call predecessors, (31), 3 states have call successors, (31) [2023-04-01 12:07:44,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2574 states and 2963 transitions. [2023-04-01 12:07:44,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-04-01 12:07:44,288 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:07:44,288 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 12:07:44,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 12:07:44,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:07:44,495 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:07:44,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:07:44,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1070889213, now seen corresponding path program 1 times [2023-04-01 12:07:44,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:07:44,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894860974] [2023-04-01 12:07:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:07:44,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:07:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:07:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-04-01 12:07:45,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:07:45,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894860974] [2023-04-01 12:07:45,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894860974] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:07:45,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021809714] [2023-04-01 12:07:45,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:07:45,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:07:45,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:07:45,265 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:07:45,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 12:07:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:07:45,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 56 conjunts are in the unsatisfiable core [2023-04-01 12:07:45,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:07:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 114 proven. 14 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-04-01 12:07:45,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:07:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-04-01 12:07:47,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021809714] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:07:47,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [198955206] [2023-04-01 12:07:47,168 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2023-04-01 12:07:47,168 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:07:47,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:07:47,169 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:07:47,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:07:47,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 12:07:47,428 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 127 for LOIs