/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_product10.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:04:02,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:04:02,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:04:02,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:04:02,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:04:02,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:04:02,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:04:02,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:04:02,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:04:02,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:04:02,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:04:02,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:04:02,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:04:02,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:04:02,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:04:02,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:04:02,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:04:02,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:04:02,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:04:02,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:04:02,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:04:02,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:04:02,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:04:02,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:04:02,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:04:02,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:04:02,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:04:02,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:04:02,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:04:02,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:04:02,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:04:02,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:04:02,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:04:02,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:04:02,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:04:02,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:04:02,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:04:02,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:04:02,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:04:02,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:04:02,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:04:02,138 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 12:04:02,168 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:04:02,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:04:02,169 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:04:02,169 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:04:02,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:04:02,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:04:02,171 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:04:02,171 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:04:02,171 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:04:02,171 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:04:02,172 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:04:02,172 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:04:02,172 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:04:02,172 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:04:02,172 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:04:02,172 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:04:02,172 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:04:02,173 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:04:02,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:04:02,173 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:04:02,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:04:02,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:04:02,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:04:02,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:04:02,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:04:02,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:04:02,174 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:04:02,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:04:02,174 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:04:02,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:04:02,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:04:02,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:04:02,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:04:02,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:04:02,175 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:04:02,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:04:02,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:04:02,176 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:04:02,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:04:02,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:04:02,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:04:02,176 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:04:02,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:04:02,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:04:02,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:04:02,450 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:04:02,450 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:04:02,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/minepump_spec4_product10.cil.c [2023-04-01 12:04:03,708 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:04:03,922 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:04:03,923 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product10.cil.c [2023-04-01 12:04:03,931 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09d8c04ed/88fe3526a65946c7a32d1401fd0fef5e/FLAG06bd7ece2 [2023-04-01 12:04:03,951 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09d8c04ed/88fe3526a65946c7a32d1401fd0fef5e [2023-04-01 12:04:03,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:04:03,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:04:03,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:04:03,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:04:03,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:04:03,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:04:03" (1/1) ... [2023-04-01 12:04:03,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@694cc6f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:03, skipping insertion in model container [2023-04-01 12:04:03,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:04:03" (1/1) ... [2023-04-01 12:04:03,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:04:04,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:04:04,182 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_product10.cil.c[11718,11731] [2023-04-01 12:04:04,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:04:04,227 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:04:04,272 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_product10.cil.c[11718,11731] [2023-04-01 12:04:04,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:04:04,307 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:04:04,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:04 WrapperNode [2023-04-01 12:04:04,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:04:04,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:04:04,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:04:04,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:04:04,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:04" (1/1) ... [2023-04-01 12:04:04,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:04" (1/1) ... [2023-04-01 12:04:04,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:04" (1/1) ... [2023-04-01 12:04:04,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:04" (1/1) ... [2023-04-01 12:04:04,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:04" (1/1) ... [2023-04-01 12:04:04,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:04" (1/1) ... [2023-04-01 12:04:04,389 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:04" (1/1) ... [2023-04-01 12:04:04,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:04" (1/1) ... [2023-04-01 12:04:04,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:04:04,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:04:04,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:04:04,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:04:04,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:04" (1/1) ... [2023-04-01 12:04:04,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:04:04,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:04:04,441 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 12:04:04,444 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 12:04:04,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:04:04,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:04:04,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 12:04:04,474 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:04:04,474 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2023-04-01 12:04:04,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 12:04:04,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 12:04:04,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 12:04:04,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 12:04:04,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 12:04:04,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 12:04:04,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 12:04:04,475 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 12:04:04,478 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 12:04:04,478 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 12:04:04,478 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 12:04:04,478 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:04:04,478 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 12:04:04,478 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2023-04-01 12:04:04,478 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__base [2023-04-01 12:04:04,478 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2023-04-01 12:04:04,478 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-04-01 12:04:04,478 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-04-01 12:04:04,479 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-04-01 12:04:04,479 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2023-04-01 12:04:04,479 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2023-04-01 12:04:04,479 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 12:04:04,479 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2023-04-01 12:04:04,479 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-04-01 12:04:04,479 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-04-01 12:04:04,479 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-04-01 12:04:04,479 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2023-04-01 12:04:04,479 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2023-04-01 12:04:04,480 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 12:04:04,480 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 12:04:04,480 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 12:04:04,480 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 12:04:04,480 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:04:04,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:04:04,480 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:04:04,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:04:04,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 12:04:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 12:04:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 12:04:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-04-01 12:04:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2023-04-01 12:04:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2023-04-01 12:04:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 12:04:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 12:04:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 12:04:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 12:04:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 12:04:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:04:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 12:04:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 12:04:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:04:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 12:04:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 12:04:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:04:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 12:04:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 12:04:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 12:04:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 12:04:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 12:04:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2023-04-01 12:04:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-04-01 12:04:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-04-01 12:04:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 12:04:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 12:04:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 12:04:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 12:04:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 12:04:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 12:04:04,484 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 12:04:04,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:04:04,484 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2023-04-01 12:04:04,484 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-04-01 12:04:04,484 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2023-04-01 12:04:04,484 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2023-04-01 12:04:04,484 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-04-01 12:04:04,484 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2023-04-01 12:04:04,484 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2023-04-01 12:04:04,484 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__base [2023-04-01 12:04:04,484 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-04-01 12:04:04,485 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 12:04:04,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:04:04,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:04:04,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:04:04,672 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:04:04,675 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:04:05,178 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:04:05,336 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:04:05,336 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 12:04:05,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:04:05 BoogieIcfgContainer [2023-04-01 12:04:05,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:04:05,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:04:05,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:04:05,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:04:05,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:04:03" (1/3) ... [2023-04-01 12:04:05,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20abce9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:04:05, skipping insertion in model container [2023-04-01 12:04:05,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:04:04" (2/3) ... [2023-04-01 12:04:05,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20abce9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:04:05, skipping insertion in model container [2023-04-01 12:04:05,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:04:05" (3/3) ... [2023-04-01 12:04:05,348 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product10.cil.c [2023-04-01 12:04:05,366 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:04:05,366 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:04:05,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:04:05,433 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;@58f59b9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:04:05,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:04:05,438 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 56 states have internal predecessors, (60), 36 states have call successors, (36), 21 states have call predecessors, (36), 21 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-04-01 12:04:05,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 12:04:05,447 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:04:05,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:04:05,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:04:05,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:04:05,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1106148023, now seen corresponding path program 1 times [2023-04-01 12:04:05,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:04:05,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120146048] [2023-04-01 12:04:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:04:05,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:04:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:04:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:04:05,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:04:05,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120146048] [2023-04-01 12:04:05,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120146048] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:04:05,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:04:05,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 12:04:05,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577457917] [2023-04-01 12:04:05,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:04:05,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 12:04:05,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:04:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 12:04:05,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 12:04:05,767 INFO L87 Difference]: Start difference. First operand has 107 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 56 states have internal predecessors, (60), 36 states have call successors, (36), 21 states have call predecessors, (36), 21 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 12:04:05,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:04:05,828 INFO L93 Difference]: Finished difference Result 147 states and 178 transitions. [2023-04-01 12:04:05,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 12:04:05,830 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-04-01 12:04:05,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:04:05,838 INFO L225 Difference]: With dead ends: 147 [2023-04-01 12:04:05,839 INFO L226 Difference]: Without dead ends: 74 [2023-04-01 12:04:05,843 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 12:04:05,849 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:04:05,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:04:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-04-01 12:04:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-04-01 12:04:05,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 44 states have internal predecessors, (46), 21 states have call successors, (21), 19 states have call predecessors, (21), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 12:04:05,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2023-04-01 12:04:05,895 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 42 [2023-04-01 12:04:05,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:04:05,896 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2023-04-01 12:04:05,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 12:04:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2023-04-01 12:04:05,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 12:04:05,899 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:04:05,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:04:05,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:04:05,899 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:04:05,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:04:05,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2061406722, now seen corresponding path program 1 times [2023-04-01 12:04:05,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:04:05,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335926679] [2023-04-01 12:04:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:04:05,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:04:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:04:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:04:06,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:04:06,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335926679] [2023-04-01 12:04:06,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335926679] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:04:06,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:04:06,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:04:06,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701285293] [2023-04-01 12:04:06,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:04:06,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:04:06,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:04:06,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:04:06,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:04:06,050 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 12:04:06,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:04:06,088 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2023-04-01 12:04:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:04:06,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-01 12:04:06,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:04:06,094 INFO L225 Difference]: With dead ends: 101 [2023-04-01 12:04:06,094 INFO L226 Difference]: Without dead ends: 66 [2023-04-01 12:04:06,098 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 12:04:06,101 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 9 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:04:06,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 111 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:04:06,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-01 12:04:06,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-04-01 12:04:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 39 states have internal predecessors, (40), 18 states have call successors, (18), 18 states have call predecessors, (18), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:04:06,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2023-04-01 12:04:06,125 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 43 [2023-04-01 12:04:06,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:04:06,126 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2023-04-01 12:04:06,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 12:04:06,126 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2023-04-01 12:04:06,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 12:04:06,127 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:04:06,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:04:06,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:04:06,128 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:04:06,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:04:06,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2080732182, now seen corresponding path program 1 times [2023-04-01 12:04:06,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:04:06,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20255736] [2023-04-01 12:04:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:04:06,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:04:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:04:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:04:06,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:04:06,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20255736] [2023-04-01 12:04:06,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20255736] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:04:06,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:04:06,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:04:06,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406382498] [2023-04-01 12:04:06,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:04:06,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:04:06,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:04:06,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:04:06,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:04:06,344 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 12:04:06,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:04:06,541 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2023-04-01 12:04:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:04:06,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2023-04-01 12:04:06,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:04:06,544 INFO L225 Difference]: With dead ends: 110 [2023-04-01 12:04:06,545 INFO L226 Difference]: Without dead ends: 66 [2023-04-01 12:04:06,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:04:06,547 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 87 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:04:06,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 167 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:04:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-01 12:04:06,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-04-01 12:04:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 38 states have internal predecessors, (39), 18 states have call successors, (18), 18 states have call predecessors, (18), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:04:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2023-04-01 12:04:06,557 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 46 [2023-04-01 12:04:06,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:04:06,558 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2023-04-01 12:04:06,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 12:04:06,558 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2023-04-01 12:04:06,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 12:04:06,559 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:04:06,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:04:06,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:04:06,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:04:06,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:04:06,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1242737882, now seen corresponding path program 1 times [2023-04-01 12:04:06,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:04:06,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937584916] [2023-04-01 12:04:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:04:06,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:04:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:04:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:04:06,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:04:06,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937584916] [2023-04-01 12:04:06,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937584916] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:04:06,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:04:06,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 12:04:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413232483] [2023-04-01 12:04:06,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:04:06,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 12:04:06,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:04:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 12:04:06,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:04:06,805 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:04:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:04:07,043 INFO L93 Difference]: Finished difference Result 181 states and 210 transitions. [2023-04-01 12:04:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:04:07,043 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 49 [2023-04-01 12:04:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:04:07,049 INFO L225 Difference]: With dead ends: 181 [2023-04-01 12:04:07,049 INFO L226 Difference]: Without dead ends: 137 [2023-04-01 12:04:07,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-04-01 12:04:07,059 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 72 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:04:07,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 393 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:04:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-04-01 12:04:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 129. [2023-04-01 12:04:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.2) internal successors, (84), 80 states have internal predecessors, (84), 31 states have call successors, (31), 31 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 27 states have call successors, (29) [2023-04-01 12:04:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2023-04-01 12:04:07,094 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 49 [2023-04-01 12:04:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:04:07,094 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2023-04-01 12:04:07,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:04:07,095 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2023-04-01 12:04:07,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 12:04:07,096 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:04:07,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:04:07,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:04:07,096 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:04:07,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:04:07,097 INFO L85 PathProgramCache]: Analyzing trace with hash 552877367, now seen corresponding path program 1 times [2023-04-01 12:04:07,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:04:07,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404489622] [2023-04-01 12:04:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:04:07,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:04:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:04:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:04:07,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:04:07,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404489622] [2023-04-01 12:04:07,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404489622] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:04:07,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:04:07,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:04:07,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120353698] [2023-04-01 12:04:07,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:04:07,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:04:07,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:04:07,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:04:07,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:04:07,153 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 12:04:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:04:07,176 INFO L93 Difference]: Finished difference Result 170 states and 191 transitions. [2023-04-01 12:04:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:04:07,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 52 [2023-04-01 12:04:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:04:07,178 INFO L225 Difference]: With dead ends: 170 [2023-04-01 12:04:07,178 INFO L226 Difference]: Without dead ends: 126 [2023-04-01 12:04:07,180 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 12:04:07,181 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 45 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:04:07,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 58 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:04:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-04-01 12:04:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-04-01 12:04:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 78 states have internal predecessors, (80), 30 states have call successors, (30), 30 states have call predecessors, (30), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-04-01 12:04:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2023-04-01 12:04:07,203 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 52 [2023-04-01 12:04:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:04:07,203 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2023-04-01 12:04:07,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 12:04:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2023-04-01 12:04:07,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 12:04:07,210 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:04:07,210 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 12:04:07,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:04:07,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:04:07,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:04:07,211 INFO L85 PathProgramCache]: Analyzing trace with hash -93644954, now seen corresponding path program 1 times [2023-04-01 12:04:07,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:04:07,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397351596] [2023-04-01 12:04:07,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:04:07,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:04:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:04:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 12:04:07,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:04:07,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397351596] [2023-04-01 12:04:07,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397351596] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:04:07,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795773878] [2023-04-01 12:04:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:04:07,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:04:07,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:04:07,722 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 12:04:07,744 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 12:04:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:04:07,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 12:04:07,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:04:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 12:04:08,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:04:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 12:04:08,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795773878] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:04:08,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1107253708] [2023-04-01 12:04:08,750 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2023-04-01 12:04:08,751 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:04:08,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:04:08,758 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:04:08,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:04:09,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 12:04:09,384 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 125 for LOIs [2023-04-01 12:04:11,618 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 125 for LOIs [2023-04-01 12:04:11,681 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 119 for LOIs [2023-04-01 12:04:11,712 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 119 for LOIs [2023-04-01 12:04:11,742 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 125 for LOIs [2023-04-01 12:04:14,475 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 122 for LOIs [2023-04-01 12:04:14,508 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 120 for LOIs [2023-04-01 12:04:14,953 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 117 for LOIs [2023-04-01 12:04:15,422 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 119 for LOIs [2023-04-01 12:04:15,456 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 117 for LOIs [2023-04-01 12:04:15,475 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 119 for LOIs [2023-04-01 12:04:15,500 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 119 for LOIs [2023-04-01 12:04:15,519 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment with input of size 117 for LOIs [2023-04-01 12:04:15,536 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 12:04:22,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1107253708] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:04:22,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 12:04:22,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [15, 14, 12] total 54 [2023-04-01 12:04:22,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634049587] [2023-04-01 12:04:22,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:04:22,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 12:04:22,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:04:22,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 12:04:22,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=2491, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 12:04:22,360 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 29 states, 20 states have (on average 1.55) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (15), 8 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-01 12:04:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:04:29,128 INFO L93 Difference]: Finished difference Result 284 states and 327 transitions. [2023-04-01 12:04:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 12:04:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 20 states have (on average 1.55) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (15), 8 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 79 [2023-04-01 12:04:29,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:04:29,136 INFO L225 Difference]: With dead ends: 284 [2023-04-01 12:04:29,136 INFO L226 Difference]: Without dead ends: 243 [2023-04-01 12:04:29,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=820, Invalid=4436, Unknown=0, NotChecked=0, Total=5256 [2023-04-01 12:04:29,140 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 220 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:04:29,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 121 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 12:04:29,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-04-01 12:04:29,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 213. [2023-04-01 12:04:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 136 states have internal predecessors, (142), 47 states have call successors, (47), 47 states have call predecessors, (47), 43 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-04-01 12:04:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 232 transitions. [2023-04-01 12:04:29,206 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 232 transitions. Word has length 79 [2023-04-01 12:04:29,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:04:29,206 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 232 transitions. [2023-04-01 12:04:29,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 20 states have (on average 1.55) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (15), 8 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-01 12:04:29,207 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 232 transitions. [2023-04-01 12:04:29,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 12:04:29,209 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:04:29,209 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:04:29,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 12:04:29,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 12:04:29,416 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:04:29,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:04:29,416 INFO L85 PathProgramCache]: Analyzing trace with hash 595981769, now seen corresponding path program 1 times [2023-04-01 12:04:29,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:04:29,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016162777] [2023-04-01 12:04:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:04:29,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:04:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:04:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 12:04:29,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:04:29,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016162777] [2023-04-01 12:04:29,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016162777] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:04:29,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138399025] [2023-04-01 12:04:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:04:29,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:04:29,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:04:29,937 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 12:04:29,940 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 12:04:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:04:30,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 12:04:30,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:04:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 12:04:30,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:04:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 12:04:30,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138399025] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:04:30,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1919956340] [2023-04-01 12:04:30,548 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2023-04-01 12:04:30,548 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:04:30,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:04:30,549 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:04:30,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:04:30,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 12:04:30,776 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 125 for LOIs [2023-04-01 12:04:31,894 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 125 for LOIs [2023-04-01 12:04:31,935 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 119 for LOIs [2023-04-01 12:04:31,955 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 119 for LOIs [2023-04-01 12:04:31,968 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 125 for LOIs [2023-04-01 12:04:36,621 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 163 for LOIs [2023-04-01 12:04:36,689 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 157 for LOIs [2023-04-01 12:04:37,158 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 154 for LOIs [2023-04-01 12:04:37,719 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 156 for LOIs [2023-04-01 12:04:37,748 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 154 for LOIs [2023-04-01 12:04:37,768 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 166 for LOIs [2023-04-01 12:04:37,808 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 119 for LOIs [2023-04-01 12:04:37,826 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 119 for LOIs [2023-04-01 12:04:37,838 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment with input of size 154 for LOIs [2023-04-01 12:04:37,856 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 12:04:50,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1919956340] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:04:50,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 12:04:50,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [15, 14, 12] total 58 [2023-04-01 12:04:50,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868052574] [2023-04-01 12:04:50,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:04:50,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 12:04:50,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:04:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 12:04:50,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2915, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 12:04:50,339 INFO L87 Difference]: Start difference. First operand 213 states and 232 transitions. Second operand has 33 states, 22 states have (on average 1.5) internal successors, (33), 26 states have internal predecessors, (33), 11 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12)