/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/product-lines/minepump_spec4_product15.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:58:09,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:58:09,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:58:09,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:58:09,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:58:09,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:58:09,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:58:09,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:58:09,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:58:09,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:58:09,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:58:09,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:58:09,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:58:09,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:58:09,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:58:09,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:58:09,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:58:09,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:58:09,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:58:09,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:58:09,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:58:09,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:58:09,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:58:09,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:58:09,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:58:09,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:58:09,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:58:09,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:58:09,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:58:09,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:58:09,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:58:09,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:58:09,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:58:09,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:58:09,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:58:09,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:58:09,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:58:09,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:58:09,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:58:09,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:58:09,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:58:09,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:58:09,131 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:58:09,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:58:09,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:58:09,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:58:09,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:58:09,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:58:09,133 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:58:09,133 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:58:09,133 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:58:09,134 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:58:09,134 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:58:09,134 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:58:09,134 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:58:09,134 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:58:09,134 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:58:09,135 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:58:09,135 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:58:09,135 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:58:09,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:58:09,136 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:58:09,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:58:09,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:58:09,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:58:09,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:58:09,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:58:09,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:58:09,137 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:58:09,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:58:09,137 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:58:09,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:58:09,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:58:09,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:58:09,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:58:09,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:58:09,138 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:58:09,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:58:09,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:58:09,139 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:58:09,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:58:09,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:58:09,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:58:09,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:58:09,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:58:09,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:58:09,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:58:09,394 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:58:09,395 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:58:09,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/minepump_spec4_product15.cil.c [2023-04-01 05:58:10,592 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:58:10,901 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:58:10,902 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product15.cil.c [2023-04-01 05:58:10,910 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f5a4a65/fa7d0a5a351e432f81df0280eb04e3b7/FLAG29f0c179f [2023-04-01 05:58:10,923 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f5a4a65/fa7d0a5a351e432f81df0280eb04e3b7 [2023-04-01 05:58:10,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:58:10,926 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:58:10,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:58:10,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:58:10,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:58:10,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:58:10" (1/1) ... [2023-04-01 05:58:10,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1acae0f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:10, skipping insertion in model container [2023-04-01 05:58:10,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:58:10" (1/1) ... [2023-04-01 05:58:10,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:58:10,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:58:11,124 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_product15.cil.c[2141,2154] [2023-04-01 05:58:11,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:58:11,219 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:58:11,244 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_product15.cil.c[2141,2154] [2023-04-01 05:58:11,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:58:11,336 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:58:11,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:11 WrapperNode [2023-04-01 05:58:11,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:58:11,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:58:11,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:58:11,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:58:11,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:11" (1/1) ... [2023-04-01 05:58:11,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:11" (1/1) ... [2023-04-01 05:58:11,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:11" (1/1) ... [2023-04-01 05:58:11,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:11" (1/1) ... [2023-04-01 05:58:11,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:11" (1/1) ... [2023-04-01 05:58:11,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:11" (1/1) ... [2023-04-01 05:58:11,408 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:11" (1/1) ... [2023-04-01 05:58:11,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:11" (1/1) ... [2023-04-01 05:58:11,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:58:11,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:58:11,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:58:11,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:58:11,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:11" (1/1) ... [2023-04-01 05:58:11,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:58:11,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:58:11,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:58:11,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:58:11,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:58:11,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:58:11,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 05:58:11,490 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:58:11,490 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 05:58:11,490 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 05:58:11,490 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 05:58:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 05:58:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 05:58:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 05:58:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 05:58:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-04-01 05:58:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2023-04-01 05:58:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__base [2023-04-01 05:58:11,491 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2023-04-01 05:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-04-01 05:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-04-01 05:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-04-01 05:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2023-04-01 05:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2023-04-01 05:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 05:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 05:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 05:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 05:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 05:58:11,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 05:58:11,493 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2023-04-01 05:58:11,493 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-04-01 05:58:11,493 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-04-01 05:58:11,493 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-04-01 05:58:11,493 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2023-04-01 05:58:11,493 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2023-04-01 05:58:11,493 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 05:58:11,494 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 05:58:11,494 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 05:58:11,494 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 05:58:11,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:58:11,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2023-04-01 05:58:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:58:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:58:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:58:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:58:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:58:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 05:58:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 05:58:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 05:58:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 05:58:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 05:58:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 05:58:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-04-01 05:58:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-04-01 05:58:11,495 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2023-04-01 05:58:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 05:58:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 05:58:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 05:58:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2023-04-01 05:58:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-04-01 05:58:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2023-04-01 05:58:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2023-04-01 05:58:11,496 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-04-01 05:58:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-04-01 05:58:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2023-04-01 05:58:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2023-04-01 05:58:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2023-04-01 05:58:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-04-01 05:58:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-04-01 05:58:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__base [2023-04-01 05:58:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 05:58:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 05:58:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 05:58:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 05:58:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 05:58:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:58:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 05:58:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 05:58:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:58:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 05:58:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 05:58:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:58:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 05:58:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 05:58:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 05:58:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2023-04-01 05:58:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 05:58:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 05:58:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 05:58:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:58:11,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:58:11,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:58:11,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:58:11,661 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:58:11,664 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:58:12,176 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:58:12,333 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:58:12,333 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 05:58:12,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:58:12 BoogieIcfgContainer [2023-04-01 05:58:12,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:58:12,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:58:12,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:58:12,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:58:12,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:58:10" (1/3) ... [2023-04-01 05:58:12,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3d4ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:58:12, skipping insertion in model container [2023-04-01 05:58:12,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:11" (2/3) ... [2023-04-01 05:58:12,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3d4ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:58:12, skipping insertion in model container [2023-04-01 05:58:12,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:58:12" (3/3) ... [2023-04-01 05:58:12,349 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product15.cil.c [2023-04-01 05:58:12,365 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:58:12,366 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:58:12,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:58:12,433 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;@ac18442, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:58:12,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:58:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 75 states have internal predecessors, (80), 43 states have call successors, (43), 26 states have call predecessors, (43), 26 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2023-04-01 05:58:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 05:58:12,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:12,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:58:12,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:12,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:12,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1313499689, now seen corresponding path program 1 times [2023-04-01 05:58:12,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:12,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659896676] [2023-04-01 05:58:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:12,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:58:12,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:12,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659896676] [2023-04-01 05:58:12,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659896676] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:12,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:12,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:58:12,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508376052] [2023-04-01 05:58:12,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:12,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:58:12,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:12,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:58:12,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:58:12,731 INFO L87 Difference]: Start difference. First operand has 135 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 75 states have internal predecessors, (80), 43 states have call successors, (43), 26 states have call predecessors, (43), 26 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 05:58:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:12,814 INFO L93 Difference]: Finished difference Result 189 states and 232 transitions. [2023-04-01 05:58:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:58:12,817 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-04-01 05:58:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:12,824 INFO L225 Difference]: With dead ends: 189 [2023-04-01 05:58:12,824 INFO L226 Difference]: Without dead ends: 95 [2023-04-01 05:58:12,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:58:12,829 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:58:12,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:58:12,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-01 05:58:12,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-04-01 05:58:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 58 states have internal predecessors, (61), 27 states have call successors, (27), 23 states have call predecessors, (27), 18 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-04-01 05:58:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2023-04-01 05:58:12,882 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 42 [2023-04-01 05:58:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:12,882 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2023-04-01 05:58:12,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 05:58:12,883 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2023-04-01 05:58:12,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 05:58:12,885 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:12,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:58:12,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:58:12,886 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:12,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:12,887 INFO L85 PathProgramCache]: Analyzing trace with hash 523043538, now seen corresponding path program 1 times [2023-04-01 05:58:12,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:12,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799239048] [2023-04-01 05:58:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:12,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:58:13,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:13,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799239048] [2023-04-01 05:58:13,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799239048] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:13,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:13,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:58:13,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139343959] [2023-04-01 05:58:13,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:13,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:58:13,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:13,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:58:13,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:58:13,027 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 05:58:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:13,057 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2023-04-01 05:58:13,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:58:13,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-01 05:58:13,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:13,059 INFO L225 Difference]: With dead ends: 140 [2023-04-01 05:58:13,059 INFO L226 Difference]: Without dead ends: 87 [2023-04-01 05:58:13,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:58:13,061 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 11 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:58:13,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 158 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:58:13,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-04-01 05:58:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-04-01 05:58:13,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 44 states have (on average 1.25) internal successors, (55), 53 states have internal predecessors, (55), 24 states have call successors, (24), 22 states have call predecessors, (24), 18 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-01 05:58:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2023-04-01 05:58:13,071 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 43 [2023-04-01 05:58:13,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:13,072 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2023-04-01 05:58:13,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 05:58:13,072 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2023-04-01 05:58:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 05:58:13,073 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:13,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:58:13,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:58:13,074 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:13,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:13,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2114908521, now seen corresponding path program 1 times [2023-04-01 05:58:13,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:13,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974794958] [2023-04-01 05:58:13,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:13,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:58:13,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:13,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974794958] [2023-04-01 05:58:13,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974794958] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:13,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:13,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:58:13,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050145686] [2023-04-01 05:58:13,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:13,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:58:13,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:13,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:58:13,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:58:13,291 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 05:58:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:13,621 INFO L93 Difference]: Finished difference Result 261 states and 310 transitions. [2023-04-01 05:58:13,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:58:13,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2023-04-01 05:58:13,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:13,629 INFO L225 Difference]: With dead ends: 261 [2023-04-01 05:58:13,630 INFO L226 Difference]: Without dead ends: 196 [2023-04-01 05:58:13,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:58:13,641 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 192 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:58:13,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 399 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:58:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-04-01 05:58:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 188. [2023-04-01 05:58:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 101 states have (on average 1.2871287128712872) internal successors, (130), 119 states have internal predecessors, (130), 48 states have call successors, (48), 44 states have call predecessors, (48), 38 states have return successors, (45), 36 states have call predecessors, (45), 44 states have call successors, (45) [2023-04-01 05:58:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 223 transitions. [2023-04-01 05:58:13,690 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 223 transitions. Word has length 46 [2023-04-01 05:58:13,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:13,691 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 223 transitions. [2023-04-01 05:58:13,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 05:58:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 223 transitions. [2023-04-01 05:58:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 05:58:13,693 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:13,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:58:13,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:58:13,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:13,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:13,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1201641610, now seen corresponding path program 1 times [2023-04-01 05:58:13,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:13,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252334736] [2023-04-01 05:58:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:13,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:58:13,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:13,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252334736] [2023-04-01 05:58:13,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252334736] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:13,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:13,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 05:58:13,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053349006] [2023-04-01 05:58:13,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:13,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:58:13,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:13,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:58:13,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:58:13,984 INFO L87 Difference]: Start difference. First operand 188 states and 223 transitions. Second operand has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 05:58:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:14,309 INFO L93 Difference]: Finished difference Result 647 states and 814 transitions. [2023-04-01 05:58:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 05:58:14,310 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2023-04-01 05:58:14,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:14,314 INFO L225 Difference]: With dead ends: 647 [2023-04-01 05:58:14,314 INFO L226 Difference]: Without dead ends: 481 [2023-04-01 05:58:14,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-04-01 05:58:14,317 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 161 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:58:14,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 558 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:58:14,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2023-04-01 05:58:14,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 457. [2023-04-01 05:58:14,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 256 states have (on average 1.29296875) internal successors, (331), 299 states have internal predecessors, (331), 111 states have call successors, (111), 99 states have call predecessors, (111), 89 states have return successors, (118), 83 states have call predecessors, (118), 107 states have call successors, (118) [2023-04-01 05:58:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 560 transitions. [2023-04-01 05:58:14,365 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 560 transitions. Word has length 51 [2023-04-01 05:58:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:14,365 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 560 transitions. [2023-04-01 05:58:14,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 05:58:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 560 transitions. [2023-04-01 05:58:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 05:58:14,369 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:14,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:58:14,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 05:58:14,369 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:14,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:14,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1183425773, now seen corresponding path program 1 times [2023-04-01 05:58:14,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:14,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670716113] [2023-04-01 05:58:14,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:14,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:58:14,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:14,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670716113] [2023-04-01 05:58:14,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670716113] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:14,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:14,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:58:14,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911975174] [2023-04-01 05:58:14,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:14,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:58:14,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:14,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:58:14,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:58:14,461 INFO L87 Difference]: Start difference. First operand 457 states and 560 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 05:58:14,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:14,570 INFO L93 Difference]: Finished difference Result 790 states and 1003 transitions. [2023-04-01 05:58:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:58:14,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2023-04-01 05:58:14,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:14,573 INFO L225 Difference]: With dead ends: 790 [2023-04-01 05:58:14,573 INFO L226 Difference]: Without dead ends: 355 [2023-04-01 05:58:14,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:58:14,576 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 72 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:58:14,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 37 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:58:14,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-04-01 05:58:14,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 343. [2023-04-01 05:58:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 208 states have (on average 1.2163461538461537) internal successors, (253), 227 states have internal predecessors, (253), 69 states have call successors, (69), 69 states have call predecessors, (69), 65 states have return successors, (68), 65 states have call predecessors, (68), 65 states have call successors, (68) [2023-04-01 05:58:14,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 390 transitions. [2023-04-01 05:58:14,605 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 390 transitions. Word has length 54 [2023-04-01 05:58:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:14,607 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 390 transitions. [2023-04-01 05:58:14,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 05:58:14,607 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 390 transitions. [2023-04-01 05:58:14,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 05:58:14,616 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:14,616 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:58:14,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 05:58:14,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:14,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:14,618 INFO L85 PathProgramCache]: Analyzing trace with hash -995987222, now seen corresponding path program 1 times [2023-04-01 05:58:14,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:14,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966341699] [2023-04-01 05:58:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:14,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 05:58:14,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:14,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966341699] [2023-04-01 05:58:14,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966341699] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:58:14,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851116249] [2023-04-01 05:58:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:14,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:58:14,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:58:14,793 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:58:14,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:58:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:14,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 05:58:14,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:58:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 05:58:15,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:58:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:58:15,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851116249] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:58:15,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [373970054] [2023-04-01 05:58:15,894 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2023-04-01 05:58:15,894 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:58:15,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:58:15,902 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:58:15,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:58:16,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 05:58:16,128 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2023-04-01 05:58:16,325 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 32 for LOIs [2023-04-01 05:58:16,339 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 24 for LOIs [2023-04-01 05:58:16,341 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 24 for LOIs [2023-04-01 05:58:16,344 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 32 for LOIs [2023-04-01 05:58:20,438 INFO L197 IcfgInterpreter]: Interpreting procedure stopSystem with input of size 30 for LOIs [2023-04-01 05:58:20,444 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 46 for LOIs [2023-04-01 05:58:20,453 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 31 for LOIs [2023-04-01 05:58:20,568 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 22 for LOIs [2023-04-01 05:58:20,609 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 24 for LOIs [2023-04-01 05:58:20,612 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 22 for LOIs [2023-04-01 05:58:20,614 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 24 for LOIs [2023-04-01 05:58:20,617 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 24 for LOIs [2023-04-01 05:58:20,619 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:58:23,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [373970054] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:23,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:58:23,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [7, 14, 12] total 60 [2023-04-01 05:58:23,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143787312] [2023-04-01 05:58:23,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:23,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-01 05:58:23,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:23,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-01 05:58:23,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=3160, Unknown=0, NotChecked=0, Total=3540 [2023-04-01 05:58:23,092 INFO L87 Difference]: Start difference. First operand 343 states and 390 transitions. Second operand has 34 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 26 states have internal predecessors, (34), 11 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-01 05:58:31,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:31,326 INFO L93 Difference]: Finished difference Result 823 states and 977 transitions. [2023-04-01 05:58:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-04-01 05:58:31,326 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 26 states have internal predecessors, (34), 11 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 78 [2023-04-01 05:58:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:31,330 INFO L225 Difference]: With dead ends: 823 [2023-04-01 05:58:31,330 INFO L226 Difference]: Without dead ends: 612 [2023-04-01 05:58:31,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 185 SyntacticMatches, 4 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1396, Invalid=8704, Unknown=0, NotChecked=0, Total=10100 [2023-04-01 05:58:31,335 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 665 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3080 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 3536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 3080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 05:58:31,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 215 Invalid, 3536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 3080 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 05:58:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2023-04-01 05:58:31,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 528. [2023-04-01 05:58:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 329 states have (on average 1.21580547112462) internal successors, (400), 355 states have internal predecessors, (400), 101 states have call successors, (101), 101 states have call predecessors, (101), 97 states have return successors, (100), 97 states have call predecessors, (100), 97 states have call successors, (100) [2023-04-01 05:58:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 601 transitions. [2023-04-01 05:58:31,411 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 601 transitions. Word has length 78 [2023-04-01 05:58:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:31,412 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 601 transitions. [2023-04-01 05:58:31,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 26 states have internal predecessors, (34), 11 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-01 05:58:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 601 transitions. [2023-04-01 05:58:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 05:58:31,414 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:31,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:58:31,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:58:31,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 05:58:31,622 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:31,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:31,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1338135622, now seen corresponding path program 1 times [2023-04-01 05:58:31,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:31,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156842181] [2023-04-01 05:58:31,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:31,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 05:58:31,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:31,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156842181] [2023-04-01 05:58:31,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156842181] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:58:31,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983937206] [2023-04-01 05:58:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:31,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:58:31,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:58:31,814 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:58:31,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:58:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:31,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 05:58:31,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:58:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 05:58:32,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:58:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:58:32,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983937206] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:58:32,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1657584475] [2023-04-01 05:58:32,569 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2023-04-01 05:58:32,569 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:58:32,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:58:32,570 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:58:32,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:58:32,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 05:58:32,684 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2023-04-01 05:58:32,798 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 32 for LOIs [2023-04-01 05:58:32,806 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 24 for LOIs [2023-04-01 05:58:32,810 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 24 for LOIs [2023-04-01 05:58:32,813 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 32 for LOIs [2023-04-01 05:58:37,756 INFO L197 IcfgInterpreter]: Interpreting procedure stopSystem with input of size 42 for LOIs [2023-04-01 05:58:37,763 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 66 for LOIs [2023-04-01 05:58:37,774 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 43 for LOIs [2023-04-01 05:58:37,886 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 26 for LOIs [2023-04-01 05:58:37,920 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 28 for LOIs [2023-04-01 05:58:37,923 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 26 for LOIs [2023-04-01 05:58:37,926 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 39 for LOIs [2023-04-01 05:58:37,932 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 24 for LOIs [2023-04-01 05:58:37,933 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 24 for LOIs [2023-04-01 05:58:37,934 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:58:41,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1657584475] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:41,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:58:41,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [7, 14, 12] total 63 [2023-04-01 05:58:41,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161023934] [2023-04-01 05:58:41,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:41,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-01 05:58:41,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-01 05:58:41,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=3517, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 05:58:41,506 INFO L87 Difference]: Start difference. First operand 528 states and 601 transitions. Second operand has 37 states, 25 states have (on average 1.44) internal successors, (36), 28 states have internal predecessors, (36), 12 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12)