/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_productSimulator.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:07:59,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:07:59,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:07:59,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:07:59,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:07:59,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:07:59,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:07:59,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:07:59,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:07:59,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:07:59,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:07:59,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:07:59,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:07:59,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:07:59,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:07:59,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:07:59,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:07:59,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:07:59,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:07:59,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:07:59,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:07:59,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:07:59,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:07:59,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:07:59,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:07:59,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:07:59,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:07:59,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:07:59,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:07:59,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:07:59,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:07:59,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:07:59,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:07:59,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:07:59,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:07:59,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:07:59,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:07:59,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:07:59,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:07:59,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:07:59,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:07:59,946 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 12:07:59,995 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:07:59,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:07:59,996 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:07:59,996 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:07:59,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:07:59,997 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:07:59,997 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:07:59,997 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:07:59,997 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:07:59,997 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:07:59,998 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:07:59,998 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:07:59,998 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:07:59,998 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:07:59,999 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:07:59,999 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:07:59,999 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:07:59,999 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:07:59,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:07:59,999 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:08:00,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:08:00,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:08:00,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:08:00,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:08:00,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:08:00,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:08:00,000 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:08:00,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:08:00,000 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:08:00,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:08:00,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:08:00,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:08:00,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:08:00,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:08:00,017 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:08:00,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:08:00,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:08:00,018 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:08:00,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:08:00,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:08:00,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:08:00,018 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:08:00,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:08:00,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:08:00,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:08:00,457 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:08:00,457 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:08:00,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c [2023-04-01 12:08:02,181 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:08:02,698 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:08:02,698 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c [2023-04-01 12:08:02,746 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1efd5c209/3f11c983aed345a79be930a60252ec6b/FLAGe031c1ed4 [2023-04-01 12:08:02,873 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1efd5c209/3f11c983aed345a79be930a60252ec6b [2023-04-01 12:08:02,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:08:02,876 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:08:02,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:08:02,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:08:02,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:08:02,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:08:02" (1/1) ... [2023-04-01 12:08:02,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@192aa5ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:08:02, skipping insertion in model container [2023-04-01 12:08:02,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:08:02" (1/1) ... [2023-04-01 12:08:02,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:08:02,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:08:03,347 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_productSimulator.cil.c[9333,9346] [2023-04-01 12:08:03,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:08:03,501 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:08:03,543 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_productSimulator.cil.c[9333,9346] [2023-04-01 12:08:03,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:08:03,680 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:08:03,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:08:03 WrapperNode [2023-04-01 12:08:03,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:08:03,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:08:03,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:08:03,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:08:03,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:08:03" (1/1) ... [2023-04-01 12:08:03,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:08:03" (1/1) ... [2023-04-01 12:08:03,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:08:03" (1/1) ... [2023-04-01 12:08:03,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:08:03" (1/1) ... [2023-04-01 12:08:03,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:08:03" (1/1) ... [2023-04-01 12:08:03,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:08:03" (1/1) ... [2023-04-01 12:08:03,820 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:08:03" (1/1) ... [2023-04-01 12:08:03,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:08:03" (1/1) ... [2023-04-01 12:08:03,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:08:03,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:08:03,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:08:03,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:08:03,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:08:03" (1/1) ... [2023-04-01 12:08:03,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:08:03,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:08:03,930 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 12:08:03,973 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 12:08:04,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:08:04,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:08:04,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 12:08:04,009 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:08:04,010 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 12:08:04,010 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 12:08:04,010 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 12:08:04,010 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 12:08:04,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:08:04,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2023-04-01 12:08:04,010 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 12:08:04,010 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2023-04-01 12:08:04,011 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__highWaterSensor [2023-04-01 12:08:04,011 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2023-04-01 12:08:04,011 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__lowWaterSensor [2023-04-01 12:08:04,011 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2023-04-01 12:08:04,011 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__role__methaneAlarm [2023-04-01 12:08:04,011 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2023-04-01 12:08:04,011 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2023-04-01 12:08:04,011 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__role__methaneQuery [2023-04-01 12:08:04,011 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2023-04-01 12:08:04,011 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-04-01 12:08:04,011 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-04-01 12:08:04,012 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-04-01 12:08:04,012 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2023-04-01 12:08:04,012 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2023-04-01 12:08:04,012 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2023-04-01 12:08:04,012 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2023-04-01 12:08:04,012 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2023-04-01 12:08:04,012 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 12:08:04,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 12:08:04,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 12:08:04,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 12:08:04,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 12:08:04,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 12:08:04,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 12:08:04,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 12:08:04,013 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2023-04-01 12:08:04,013 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-04-01 12:08:04,013 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-04-01 12:08:04,014 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-04-01 12:08:04,014 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2023-04-01 12:08:04,014 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2023-04-01 12:08:04,014 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2023-04-01 12:08:04,014 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2023-04-01 12:08:04,015 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 12:08:04,015 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 12:08:04,015 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 12:08:04,015 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 12:08:04,015 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:08:04,016 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:08:04,016 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:08:04,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:08:04,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 12:08:04,026 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 12:08:04,026 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 12:08:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 12:08:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2023-04-01 12:08:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-04-01 12:08:04,028 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-04-01 12:08:04,028 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 12:08:04,028 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 12:08:04,028 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 12:08:04,028 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 12:08:04,028 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 12:08:04,028 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 12:08:04,028 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 12:08:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:08:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 12:08:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-04-01 12:08:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2023-04-01 12:08:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2023-04-01 12:08:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2023-04-01 12:08:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-04-01 12:08:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2023-04-01 12:08:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2023-04-01 12:08:04,029 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2023-04-01 12:08:04,030 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2023-04-01 12:08:04,030 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-04-01 12:08:04,030 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2023-04-01 12:08:04,030 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2023-04-01 12:08:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2023-04-01 12:08:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2023-04-01 12:08:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2023-04-01 12:08:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__highWaterSensor [2023-04-01 12:08:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2023-04-01 12:08:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2023-04-01 12:08:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__lowWaterSensor [2023-04-01 12:08:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2023-04-01 12:08:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-04-01 12:08:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__role__methaneAlarm [2023-04-01 12:08:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2023-04-01 12:08:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__role__methaneQuery [2023-04-01 12:08:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 12:08:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 12:08:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 12:08:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 12:08:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 12:08:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:08:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 12:08:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 12:08:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:08:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 12:08:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 12:08:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:08:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 12:08:04,034 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 12:08:04,034 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 12:08:04,034 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 12:08:04,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:08:04,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:08:04,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:08:04,314 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:08:04,316 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:08:05,490 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:08:05,736 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:08:05,749 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 12:08:05,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:08:05 BoogieIcfgContainer [2023-04-01 12:08:05,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:08:05,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:08:05,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:08:05,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:08:05,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:08:02" (1/3) ... [2023-04-01 12:08:05,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@493c2325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:08:05, skipping insertion in model container [2023-04-01 12:08:05,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:08:03" (2/3) ... [2023-04-01 12:08:05,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@493c2325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:08:05, skipping insertion in model container [2023-04-01 12:08:05,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:08:05" (3/3) ... [2023-04-01 12:08:05,772 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_productSimulator.cil.c [2023-04-01 12:08:05,793 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:08:05,793 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:08:05,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:08:05,891 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;@8685d2a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:08:05,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:08:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 208 states, 97 states have (on average 1.288659793814433) internal successors, (125), 119 states have internal predecessors, (125), 69 states have call successors, (69), 39 states have call predecessors, (69), 39 states have return successors, (69), 58 states have call predecessors, (69), 69 states have call successors, (69) [2023-04-01 12:08:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 12:08:05,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:08:05,930 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:08:05,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:08:05,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:08:05,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1825562758, now seen corresponding path program 1 times [2023-04-01 12:08:05,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:08:05,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081999442] [2023-04-01 12:08:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:08:05,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:08:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:08:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 12:08:06,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:08:06,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081999442] [2023-04-01 12:08:06,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081999442] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:08:06,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:08:06,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 12:08:06,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369772338] [2023-04-01 12:08:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:08:06,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 12:08:06,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:08:06,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 12:08:06,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 12:08:06,569 INFO L87 Difference]: Start difference. First operand has 208 states, 97 states have (on average 1.288659793814433) internal successors, (125), 119 states have internal predecessors, (125), 69 states have call successors, (69), 39 states have call predecessors, (69), 39 states have return successors, (69), 58 states have call predecessors, (69), 69 states have call successors, (69) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-04-01 12:08:06,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:08:06,722 INFO L93 Difference]: Finished difference Result 335 states and 421 transitions. [2023-04-01 12:08:06,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 12:08:06,724 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 66 [2023-04-01 12:08:06,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:08:06,740 INFO L225 Difference]: With dead ends: 335 [2023-04-01 12:08:06,740 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 12:08:06,760 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 12:08:06,766 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:08:06,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 202 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:08:06,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 12:08:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 12:08:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 88 states have (on average 1.2613636363636365) internal successors, (111), 107 states have internal predecessors, (111), 54 states have call successors, (54), 37 states have call predecessors, (54), 32 states have return successors, (49), 38 states have call predecessors, (49), 49 states have call successors, (49) [2023-04-01 12:08:06,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 214 transitions. [2023-04-01 12:08:06,883 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 214 transitions. Word has length 66 [2023-04-01 12:08:06,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:08:06,884 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 214 transitions. [2023-04-01 12:08:06,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-04-01 12:08:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 214 transitions. [2023-04-01 12:08:06,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 12:08:06,896 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:08:06,897 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:08:06,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:08:06,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:08:06,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:08:06,913 INFO L85 PathProgramCache]: Analyzing trace with hash 809615112, now seen corresponding path program 1 times [2023-04-01 12:08:06,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:08:06,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229551783] [2023-04-01 12:08:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:08:06,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:08:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:08:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 12:08:07,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:08:07,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229551783] [2023-04-01 12:08:07,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229551783] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:08:07,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:08:07,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:08:07,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796716844] [2023-04-01 12:08:07,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:08:07,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:08:07,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:08:07,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:08:07,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:08:07,200 INFO L87 Difference]: Start difference. First operand 175 states and 214 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-04-01 12:08:07,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:08:07,325 INFO L93 Difference]: Finished difference Result 281 states and 342 transitions. [2023-04-01 12:08:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:08:07,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 67 [2023-04-01 12:08:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:08:07,332 INFO L225 Difference]: With dead ends: 281 [2023-04-01 12:08:07,332 INFO L226 Difference]: Without dead ends: 167 [2023-04-01 12:08:07,333 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 12:08:07,334 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 15 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:08:07,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 343 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:08:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-04-01 12:08:07,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-04-01 12:08:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 102 states have internal predecessors, (105), 51 states have call successors, (51), 36 states have call predecessors, (51), 32 states have return successors, (47), 36 states have call predecessors, (47), 47 states have call successors, (47) [2023-04-01 12:08:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 203 transitions. [2023-04-01 12:08:07,372 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 203 transitions. Word has length 67 [2023-04-01 12:08:07,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:08:07,372 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 203 transitions. [2023-04-01 12:08:07,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-04-01 12:08:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 203 transitions. [2023-04-01 12:08:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 12:08:07,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:08:07,375 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:08:07,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:08:07,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:08:07,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:08:07,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1968688692, now seen corresponding path program 1 times [2023-04-01 12:08:07,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:08:07,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22884090] [2023-04-01 12:08:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:08:07,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:08:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:08:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 12:08:07,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:08:07,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22884090] [2023-04-01 12:08:07,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22884090] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:08:07,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:08:07,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:08:07,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284734151] [2023-04-01 12:08:07,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:08:07,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:08:07,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:08:07,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:08:07,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:08:07,943 INFO L87 Difference]: Start difference. First operand 167 states and 203 transitions. Second operand has 9 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 12:08:08,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:08:08,945 INFO L93 Difference]: Finished difference Result 476 states and 591 transitions. [2023-04-01 12:08:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:08:08,964 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 71 [2023-04-01 12:08:08,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:08:08,969 INFO L225 Difference]: With dead ends: 476 [2023-04-01 12:08:08,969 INFO L226 Difference]: Without dead ends: 345 [2023-04-01 12:08:08,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:08:08,979 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 469 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 12:08:08,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 772 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 12:08:08,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2023-04-01 12:08:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 333. [2023-04-01 12:08:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 173 states have (on average 1.30635838150289) internal successors, (226), 210 states have internal predecessors, (226), 95 states have call successors, (95), 70 states have call predecessors, (95), 64 states have return successors, (92), 67 states have call predecessors, (92), 91 states have call successors, (92) [2023-04-01 12:08:09,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 413 transitions. [2023-04-01 12:08:09,063 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 413 transitions. Word has length 71 [2023-04-01 12:08:09,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:08:09,064 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 413 transitions. [2023-04-01 12:08:09,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 12:08:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 413 transitions. [2023-04-01 12:08:09,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 12:08:09,069 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:08:09,069 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:08:09,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:08:09,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:08:09,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:08:09,070 INFO L85 PathProgramCache]: Analyzing trace with hash -962903138, now seen corresponding path program 1 times [2023-04-01 12:08:09,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:08:09,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199278028] [2023-04-01 12:08:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:08:09,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:08:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:08:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 12:08:09,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:08:09,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199278028] [2023-04-01 12:08:09,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199278028] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:08:09,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:08:09,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:08:09,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767613383] [2023-04-01 12:08:09,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:08:09,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:08:09,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:08:09,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:08:09,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:08:09,461 INFO L87 Difference]: Start difference. First operand 333 states and 413 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2023-04-01 12:08:09,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:08:09,827 INFO L93 Difference]: Finished difference Result 909 states and 1154 transitions. [2023-04-01 12:08:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 12:08:09,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 76 [2023-04-01 12:08:09,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:08:09,838 INFO L225 Difference]: With dead ends: 909 [2023-04-01 12:08:09,838 INFO L226 Difference]: Without dead ends: 612 [2023-04-01 12:08:09,840 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 12:08:09,863 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 162 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:08:09,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 772 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:08:09,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2023-04-01 12:08:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 594. [2023-04-01 12:08:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 314 states have (on average 1.3184713375796178) internal successors, (414), 381 states have internal predecessors, (414), 166 states have call successors, (166), 121 states have call predecessors, (166), 113 states have return successors, (168), 114 states have call predecessors, (168), 162 states have call successors, (168) [2023-04-01 12:08:09,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 748 transitions. [2023-04-01 12:08:09,971 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 748 transitions. Word has length 76 [2023-04-01 12:08:09,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:08:09,971 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 748 transitions. [2023-04-01 12:08:09,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2023-04-01 12:08:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 748 transitions. [2023-04-01 12:08:09,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 12:08:09,976 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:08:09,976 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:08:09,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:08:09,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:08:09,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:08:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash -517671010, now seen corresponding path program 1 times [2023-04-01 12:08:09,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:08:09,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453188567] [2023-04-01 12:08:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:08:09,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:08:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:08:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 12:08:10,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:08:10,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453188567] [2023-04-01 12:08:10,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453188567] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:08:10,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:08:10,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:08:10,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108426062] [2023-04-01 12:08:10,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:08:10,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:08:10,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:08:10,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:08:10,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:08:10,319 INFO L87 Difference]: Start difference. First operand 594 states and 748 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-04-01 12:08:11,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:08:11,142 INFO L93 Difference]: Finished difference Result 1506 states and 2058 transitions. [2023-04-01 12:08:11,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 12:08:11,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 79 [2023-04-01 12:08:11,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:08:11,151 INFO L225 Difference]: With dead ends: 1506 [2023-04-01 12:08:11,151 INFO L226 Difference]: Without dead ends: 948 [2023-04-01 12:08:11,152 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 12:08:11,153 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 237 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:08:11,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 496 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:08:11,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2023-04-01 12:08:11,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 842. [2023-04-01 12:08:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 463 states have (on average 1.2505399568034556) internal successors, (579), 520 states have internal predecessors, (579), 187 states have call successors, (187), 152 states have call predecessors, (187), 191 states have return successors, (292), 191 states have call predecessors, (292), 183 states have call successors, (292) [2023-04-01 12:08:11,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1058 transitions. [2023-04-01 12:08:11,328 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1058 transitions. Word has length 79 [2023-04-01 12:08:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:08:11,329 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1058 transitions. [2023-04-01 12:08:11,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-04-01 12:08:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1058 transitions. [2023-04-01 12:08:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 12:08:11,340 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:08:11,340 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:08:11,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:08:11,340 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:08:11,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:08:11,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1210386022, now seen corresponding path program 1 times [2023-04-01 12:08:11,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:08:11,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032415928] [2023-04-01 12:08:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:08:11,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:08:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:08:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 12:08:12,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:08:12,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032415928] [2023-04-01 12:08:12,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032415928] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:08:12,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:08:12,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-04-01 12:08:12,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305992972] [2023-04-01 12:08:12,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:08:12,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 12:08:12,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:08:12,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 12:08:12,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:08:12,111 INFO L87 Difference]: Start difference. First operand 842 states and 1058 transitions. Second operand has 15 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (22), 8 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-01 12:08:12,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:08:12,973 INFO L93 Difference]: Finished difference Result 1597 states and 2114 transitions. [2023-04-01 12:08:12,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 12:08:12,974 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (22), 8 states have call predecessors, (22), 4 states have call successors, (22) Word has length 107 [2023-04-01 12:08:12,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:08:12,993 INFO L225 Difference]: With dead ends: 1597 [2023-04-01 12:08:12,993 INFO L226 Difference]: Without dead ends: 1099 [2023-04-01 12:08:12,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2023-04-01 12:08:12,996 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 384 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 1687 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 12:08:12,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 1687 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 12:08:12,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2023-04-01 12:08:13,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1070. [2023-04-01 12:08:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 603 states have (on average 1.2620232172470978) internal successors, (761), 673 states have internal predecessors, (761), 234 states have call successors, (234), 195 states have call predecessors, (234), 232 states have return successors, (407), 231 states have call predecessors, (407), 230 states have call successors, (407) [2023-04-01 12:08:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1402 transitions. [2023-04-01 12:08:13,188 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1402 transitions. Word has length 107 [2023-04-01 12:08:13,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:08:13,188 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 1402 transitions. [2023-04-01 12:08:13,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 4 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (22), 8 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-01 12:08:13,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1402 transitions. [2023-04-01 12:08:13,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 12:08:13,218 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:08:13,218 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:08:13,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:08:13,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:08:13,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:08:13,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1590059728, now seen corresponding path program 1 times [2023-04-01 12:08:13,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:08:13,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524220450] [2023-04-01 12:08:13,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:08:13,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:08:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:08:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 12:08:13,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:08:13,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524220450] [2023-04-01 12:08:13,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524220450] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:08:13,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138438890] [2023-04-01 12:08:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:08:13,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:08:13,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:08:13,371 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 12:08:13,422 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 12:08:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:08:13,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 12:08:13,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:08:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 12:08:13,842 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:08:13,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138438890] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:08:13,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:08:13,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-04-01 12:08:13,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958400320] [2023-04-01 12:08:13,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:08:13,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:08:13,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:08:13,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:08:13,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:08:13,845 INFO L87 Difference]: Start difference. First operand 1070 states and 1402 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-01 12:08:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:08:14,142 INFO L93 Difference]: Finished difference Result 2404 states and 3294 transitions. [2023-04-01 12:08:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:08:14,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 147 [2023-04-01 12:08:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:08:14,151 INFO L225 Difference]: With dead ends: 2404 [2023-04-01 12:08:14,151 INFO L226 Difference]: Without dead ends: 1370 [2023-04-01 12:08:14,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:08:14,171 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 100 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:08:14,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 362 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:08:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2023-04-01 12:08:14,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1370. [2023-04-01 12:08:14,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 787 states have (on average 1.2579415501905973) internal successors, (990), 870 states have internal predecessors, (990), 292 states have call successors, (292), 253 states have call predecessors, (292), 290 states have return successors, (552), 289 states have call predecessors, (552), 288 states have call successors, (552) [2023-04-01 12:08:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1834 transitions. [2023-04-01 12:08:14,474 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1834 transitions. Word has length 147 [2023-04-01 12:08:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:08:14,475 INFO L495 AbstractCegarLoop]: Abstraction has 1370 states and 1834 transitions. [2023-04-01 12:08:14,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-01 12:08:14,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1834 transitions. [2023-04-01 12:08:14,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 12:08:14,484 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:08:14,484 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:08:14,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 12:08:14,706 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 12:08:14,706 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:08:14,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:08:14,707 INFO L85 PathProgramCache]: Analyzing trace with hash -101783973, now seen corresponding path program 1 times [2023-04-01 12:08:14,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:08:14,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313845998] [2023-04-01 12:08:14,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:08:14,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:08:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:08:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-04-01 12:08:15,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:08:15,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313845998] [2023-04-01 12:08:15,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313845998] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:08:15,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63115953] [2023-04-01 12:08:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:08:15,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:08:15,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:08:15,756 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 12:08:15,800 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 12:08:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:08:16,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 12:08:16,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:08:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 12:08:16,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:08:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-04-01 12:08:17,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63115953] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:08:17,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697043640] [2023-04-01 12:08:18,006 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2023-04-01 12:08:18,007 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:08:18,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:08:18,032 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:08:18,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:08:19,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2023-04-01 12:08:19,501 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 159 for LOIs [2023-04-01 12:08:25,573 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 131 for LOIs [2023-04-01 12:08:25,662 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 131 for LOIs [2023-04-01 12:08:33,543 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 133 for LOIs [2023-04-01 12:08:33,641 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 125 for LOIs [2023-04-01 12:08:35,833 INFO L197 IcfgInterpreter]: Interpreting procedure lowerWaterLevel with input of size 125 for LOIs [2023-04-01 12:08:35,878 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment with input of size 129 for LOIs [2023-04-01 12:08:37,175 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 131 for LOIs [2023-04-01 12:08:38,249 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 133 for LOIs [2023-04-01 12:08:39,063 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__role__highWaterSensor with input of size 136 for LOIs [2023-04-01 12:08:40,987 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 129 for LOIs [2023-04-01 12:08:41,009 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterLevel with input of size 128 for LOIs [2023-04-01 12:08:41,758 INFO L197 IcfgInterpreter]: Interpreting procedure isHighWaterSensorDry with input of size 128 for LOIs [2023-04-01 12:08:41,791 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump with input of size 140 for LOIs [2023-04-01 12:08:42,140 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 142 for LOIs [2023-04-01 12:08:42,173 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 123 for LOIs [2023-04-01 12:08:42,190 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 149 for LOIs [2023-04-01 12:08:45,473 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 137 for LOIs [2023-04-01 12:08:45,603 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 129 for LOIs [2023-04-01 12:08:46,333 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 131 for LOIs [2023-04-01 12:08:46,360 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 136 for LOIs [2023-04-01 12:08:46,400 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 129 for LOIs [2023-04-01 12:08:46,425 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 123 for LOIs [2023-04-01 12:08:46,454 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 137 for LOIs [2023-04-01 12:08:46,483 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 12:09:13,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19063#(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)) (= ~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) (= ~__SELECTED_FEATURE_methaneAlarm~0 0) (= ~__GUIDSL_ROOT_PRODUCTION~0 1) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= (select |#length| 6) 21) (= (select |#valid| 14) 1) (not (= 0 ~__SELECTED_FEATURE_highWaterSensor~0)) (= 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) (= ~__SELECTED_FEATURE_lowWaterSensor~0 0) (= ~__SELECTED_FEATURE_base~0 1) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 1) 1) 0) (= 38 (select |#length| 2)) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= (select |#valid| 13) 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2023-04-01 12:09:13,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 12:09:13,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 12:09:13,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 17] total 33 [2023-04-01 12:09:13,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506986479] [2023-04-01 12:09:13,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 12:09:13,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 12:09:13,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:09:13,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 12:09:13,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=940, Invalid=9772, Unknown=0, NotChecked=0, Total=10712 [2023-04-01 12:09:13,550 INFO L87 Difference]: Start difference. First operand 1370 states and 1834 transitions. Second operand has 33 states, 22 states have (on average 6.363636363636363) internal successors, (140), 27 states have internal predecessors, (140), 10 states have call successors, (68), 11 states have call predecessors, (68), 18 states have return successors, (62), 16 states have call predecessors, (62), 10 states have call successors, (62) [2023-04-01 12:09:17,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:09:17,907 INFO L93 Difference]: Finished difference Result 6774 states and 10593 transitions. [2023-04-01 12:09:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-04-01 12:09:17,908 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 22 states have (on average 6.363636363636363) internal successors, (140), 27 states have internal predecessors, (140), 10 states have call successors, (68), 11 states have call predecessors, (68), 18 states have return successors, (62), 16 states have call predecessors, (62), 10 states have call successors, (62) Word has length 152 [2023-04-01 12:09:17,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:09:17,942 INFO L225 Difference]: With dead ends: 6774 [2023-04-01 12:09:17,942 INFO L226 Difference]: Without dead ends: 5860 [2023-04-01 12:09:17,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 371 SyntacticMatches, 6 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10409 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=1899, Invalid=20751, Unknown=0, NotChecked=0, Total=22650 [2023-04-01 12:09:17,953 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 2698 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 4993 mSolverCounterSat, 2163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2775 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 7156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2163 IncrementalHoareTripleChecker+Valid, 4993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 12:09:17,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2775 Valid, 1911 Invalid, 7156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2163 Valid, 4993 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 12:09:17,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5860 states. [2023-04-01 12:09:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5860 to 3799. [2023-04-01 12:09:18,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 2143 states have (on average 1.2463835744283713) internal successors, (2671), 2371 states have internal predecessors, (2671), 803 states have call successors, (803), 680 states have call predecessors, (803), 852 states have return successors, (1543), 848 states have call predecessors, (1543), 799 states have call successors, (1543) [2023-04-01 12:09:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 5017 transitions. [2023-04-01 12:09:18,313 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 5017 transitions. Word has length 152 [2023-04-01 12:09:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:09:18,315 INFO L495 AbstractCegarLoop]: Abstraction has 3799 states and 5017 transitions. [2023-04-01 12:09:18,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 22 states have (on average 6.363636363636363) internal successors, (140), 27 states have internal predecessors, (140), 10 states have call successors, (68), 11 states have call predecessors, (68), 18 states have return successors, (62), 16 states have call predecessors, (62), 10 states have call successors, (62) [2023-04-01 12:09:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 5017 transitions. [2023-04-01 12:09:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 12:09:18,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:09:18,320 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 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, 1, 1] [2023-04-01 12:09:18,342 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 12:09:18,540 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 12:09:18,540 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:09:18,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:09:18,540 INFO L85 PathProgramCache]: Analyzing trace with hash 321788507, now seen corresponding path program 1 times [2023-04-01 12:09:18,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:09:18,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102840388] [2023-04-01 12:09:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:09:18,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:09:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:09:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 12:09:19,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:09:19,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102840388] [2023-04-01 12:09:19,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102840388] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:09:19,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479972774] [2023-04-01 12:09:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:09:19,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:09:19,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:09:19,162 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 12:09:19,165 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 12:09:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:09:19,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-01 12:09:19,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:09:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 12:09:19,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:09:19,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479972774] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:09:19,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:09:19,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 24 [2023-04-01 12:09:19,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074555296] [2023-04-01 12:09:19,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:09:19,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 12:09:19,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:09:19,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 12:09:19,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-04-01 12:09:19,608 INFO L87 Difference]: Start difference. First operand 3799 states and 5017 transitions. Second operand has 15 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 7 states have call successors, (36), 6 states have call predecessors, (36), 8 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30)