/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_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:58:49,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:58:49,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:58:49,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:58:49,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:58:49,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:58:49,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:58:49,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:58:49,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:58:49,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:58:49,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:58:49,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:58:49,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:58:49,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:58:49,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:58:49,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:58:49,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:58:49,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:58:49,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:58:49,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:58:49,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:58:49,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:58:49,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:58:49,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:58:49,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:58:49,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:58:49,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:58:49,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:58:49,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:58:49,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:58:49,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:58:49,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:58:49,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:58:49,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:58:49,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:58:49,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:58:49,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:58:49,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:58:49,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:58:49,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:58:49,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:58:49,266 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 05:58:49,285 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:58:49,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:58:49,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:58:49,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:58:49,286 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:58:49,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:58:49,287 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:58:49,287 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:58:49,287 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:58:49,287 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:58:49,287 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:58:49,287 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:58:49,288 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:58:49,288 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:58:49,288 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:58:49,288 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:58:49,288 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:58:49,288 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:58:49,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:58:49,289 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:58:49,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:58:49,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:58:49,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:58:49,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:58:49,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:58:49,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:58:49,290 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:58:49,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:58:49,290 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:58:49,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:58:49,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:58:49,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:58:49,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:58:49,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:58:49,291 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:58:49,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:58:49,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:58:49,292 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:58:49,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:58:49,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:58:49,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:58:49,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:58:49,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:58:49,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:58:49,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:58:49,491 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:58:49,491 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:58:49,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/minepump_spec4_product24.cil.c [2023-04-01 05:58:50,672 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:58:50,922 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:58:50,923 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product24.cil.c [2023-04-01 05:58:50,934 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5ce19e0/086e2673a6fc4db3bb7ae13de4ee139e/FLAGe54b30584 [2023-04-01 05:58:50,951 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5ce19e0/086e2673a6fc4db3bb7ae13de4ee139e [2023-04-01 05:58:50,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:58:50,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:58:50,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:58:50,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:58:50,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:58:50,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:58:50" (1/1) ... [2023-04-01 05:58:50,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@524e3a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:50, skipping insertion in model container [2023-04-01 05:58:50,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:58:50" (1/1) ... [2023-04-01 05:58:50,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:58:51,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:58:51,292 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_product24.cil.c[18260,18273] [2023-04-01 05:58:51,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:58:51,310 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:58:51,366 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_product24.cil.c[18260,18273] [2023-04-01 05:58:51,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:58:51,384 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:58:51,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:51 WrapperNode [2023-04-01 05:58:51,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:58:51,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:58:51,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:58:51,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:58:51,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:51" (1/1) ... [2023-04-01 05:58:51,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:51" (1/1) ... [2023-04-01 05:58:51,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:51" (1/1) ... [2023-04-01 05:58:51,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:51" (1/1) ... [2023-04-01 05:58:51,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:51" (1/1) ... [2023-04-01 05:58:51,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:51" (1/1) ... [2023-04-01 05:58:51,448 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:51" (1/1) ... [2023-04-01 05:58:51,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:51" (1/1) ... [2023-04-01 05:58:51,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:58:51,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:58:51,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:58:51,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:58:51,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:51" (1/1) ... [2023-04-01 05:58:51,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:58:51,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:58:51,510 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 05:58:51,512 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 05:58:51,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:58:51,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:58:51,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 05:58:51,547 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:58:51,547 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 05:58:51,547 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 05:58:51,547 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 05:58:51,547 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 05:58:51,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:58:51,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 05:58:51,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 05:58:51,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 05:58:51,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 05:58:51,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 05:58:51,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 05:58:51,548 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 05:58:51,548 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 05:58:51,549 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-04-01 05:58:51,549 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2023-04-01 05:58:51,549 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2023-04-01 05:58:51,549 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2023-04-01 05:58:51,549 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-04-01 05:58:51,549 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-04-01 05:58:51,549 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-04-01 05:58:51,549 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2023-04-01 05:58:51,550 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2023-04-01 05:58:51,550 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2023-04-01 05:58:51,550 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2023-04-01 05:58:51,550 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2023-04-01 05:58:51,550 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-04-01 05:58:51,550 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-04-01 05:58:51,550 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-04-01 05:58:51,550 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2023-04-01 05:58:51,550 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2023-04-01 05:58:51,550 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2023-04-01 05:58:51,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2023-04-01 05:58:51,551 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 05:58:51,551 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 05:58:51,551 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 05:58:51,551 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 05:58:51,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 05:58:51,551 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:58:51,551 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:58:51,551 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:58:51,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:58:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:58:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 05:58:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 05:58:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 05:58:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2023-04-01 05:58:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-04-01 05:58:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-04-01 05:58:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 05:58:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 05:58:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 05:58:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 05:58:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 05:58:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 05:58:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 05:58:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:58:51,553 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 05:58:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 05:58:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 05:58:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 05:58:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 05:58:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:58:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 05:58:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 05:58:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:58:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 05:58:51,554 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 05:58:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:58:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 05:58:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 05:58:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 05:58:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2023-04-01 05:58:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2023-04-01 05:58:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2023-04-01 05:58:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-04-01 05:58:51,555 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2023-04-01 05:58:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2023-04-01 05:58:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2023-04-01 05:58:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-04-01 05:58:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-04-01 05:58:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2023-04-01 05:58:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2023-04-01 05:58:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-04-01 05:58:51,556 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2023-04-01 05:58:51,557 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2023-04-01 05:58:51,557 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-04-01 05:58:51,557 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2023-04-01 05:58:51,557 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 05:58:51,557 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 05:58:51,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:58:51,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:58:51,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:58:51,702 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:58:51,705 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:58:52,291 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:58:52,426 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:58:52,426 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 05:58:52,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:58:52 BoogieIcfgContainer [2023-04-01 05:58:52,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:58:52,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:58:52,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:58:52,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:58:52,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:58:50" (1/3) ... [2023-04-01 05:58:52,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a75913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:58:52, skipping insertion in model container [2023-04-01 05:58:52,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:58:51" (2/3) ... [2023-04-01 05:58:52,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a75913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:58:52, skipping insertion in model container [2023-04-01 05:58:52,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:58:52" (3/3) ... [2023-04-01 05:58:52,441 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product24.cil.c [2023-04-01 05:58:52,458 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:58:52,458 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:58:52,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:58:52,520 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;@16cf3217, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:58:52,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:58:52,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 82 states have internal predecessors, (86), 48 states have call successors, (48), 29 states have call predecessors, (48), 29 states have return successors, (48), 43 states have call predecessors, (48), 48 states have call successors, (48) [2023-04-01 05:58:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 05:58:52,534 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:52,534 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 05:58:52,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:52,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:52,538 INFO L85 PathProgramCache]: Analyzing trace with hash 293317712, now seen corresponding path program 1 times [2023-04-01 05:58:52,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:52,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212485256] [2023-04-01 05:58:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:52,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:52,806 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 05:58:52,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:52,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212485256] [2023-04-01 05:58:52,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212485256] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:52,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:52,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:58:52,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875635284] [2023-04-01 05:58:52,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:52,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:58:52,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:52,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:58:52,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:58:52,849 INFO L87 Difference]: Start difference. First operand has 147 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 82 states have internal predecessors, (86), 48 states have call successors, (48), 29 states have call predecessors, (48), 29 states have return successors, (48), 43 states have call predecessors, (48), 48 states have call successors, (48) 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 05:58:52,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:52,938 INFO L93 Difference]: Finished difference Result 227 states and 278 transitions. [2023-04-01 05:58:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:58:52,941 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 05:58:52,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:52,954 INFO L225 Difference]: With dead ends: 227 [2023-04-01 05:58:52,955 INFO L226 Difference]: Without dead ends: 114 [2023-04-01 05:58:52,959 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 05:58:52,964 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:58:52,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:58:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-04-01 05:58:53,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-04-01 05:58:53,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 70 states have internal predecessors, (72), 33 states have call successors, (33), 27 states have call predecessors, (33), 22 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2023-04-01 05:58:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 133 transitions. [2023-04-01 05:58:53,005 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 133 transitions. Word has length 42 [2023-04-01 05:58:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:53,005 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 133 transitions. [2023-04-01 05:58:53,006 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 05:58:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 133 transitions. [2023-04-01 05:58:53,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 05:58:53,015 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:53,015 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 05:58:53,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:58:53,016 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:53,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1626108463, now seen corresponding path program 1 times [2023-04-01 05:58:53,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:53,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037224663] [2023-04-01 05:58:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:53,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:53,136 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 05:58:53,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:53,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037224663] [2023-04-01 05:58:53,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037224663] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:53,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:53,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:58:53,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605065210] [2023-04-01 05:58:53,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:53,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:58:53,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:53,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:58:53,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:58:53,139 INFO L87 Difference]: Start difference. First operand 114 states and 133 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 05:58:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:53,200 INFO L93 Difference]: Finished difference Result 175 states and 203 transitions. [2023-04-01 05:58:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:58:53,200 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 05:58:53,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:53,202 INFO L225 Difference]: With dead ends: 175 [2023-04-01 05:58:53,202 INFO L226 Difference]: Without dead ends: 106 [2023-04-01 05:58:53,203 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 05:58:53,204 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 11 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:58:53,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 197 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:58:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-01 05:58:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-04-01 05:58:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 65 states have internal predecessors, (66), 30 states have call successors, (30), 26 states have call predecessors, (30), 22 states have return successors, (26), 21 states have call predecessors, (26), 26 states have call successors, (26) [2023-04-01 05:58:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2023-04-01 05:58:53,218 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 43 [2023-04-01 05:58:53,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:53,219 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2023-04-01 05:58:53,219 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 05:58:53,219 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2023-04-01 05:58:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 05:58:53,220 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:53,221 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] [2023-04-01 05:58:53,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:58:53,221 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:53,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:53,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1993359904, now seen corresponding path program 1 times [2023-04-01 05:58:53,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:53,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602464738] [2023-04-01 05:58:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:53,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:53,460 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 05:58:53,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:53,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602464738] [2023-04-01 05:58:53,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602464738] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:53,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:53,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:58:53,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257491591] [2023-04-01 05:58:53,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:53,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:58:53,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:53,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:58:53,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:58:53,465 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 05:58:53,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:53,862 INFO L93 Difference]: Finished difference Result 319 states and 382 transitions. [2023-04-01 05:58:53,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:58:53,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 47 [2023-04-01 05:58:53,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:53,872 INFO L225 Difference]: With dead ends: 319 [2023-04-01 05:58:53,873 INFO L226 Difference]: Without dead ends: 235 [2023-04-01 05:58:53,879 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 05:58:53,882 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 245 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:58:53,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 464 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 05:58:53,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-01 05:58:53,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 223. [2023-04-01 05:58:53,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 118 states have (on average 1.2796610169491525) internal successors, (151), 141 states have internal predecessors, (151), 59 states have call successors, (59), 51 states have call predecessors, (59), 45 states have return successors, (56), 43 states have call predecessors, (56), 55 states have call successors, (56) [2023-04-01 05:58:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 266 transitions. [2023-04-01 05:58:53,950 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 266 transitions. Word has length 47 [2023-04-01 05:58:53,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:53,951 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 266 transitions. [2023-04-01 05:58:53,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 05:58:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 266 transitions. [2023-04-01 05:58:53,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 05:58:53,961 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:53,961 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 05:58:53,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:58:53,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:53,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:53,965 INFO L85 PathProgramCache]: Analyzing trace with hash -437122076, now seen corresponding path program 1 times [2023-04-01 05:58:53,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:53,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124994043] [2023-04-01 05:58:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:53,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:54,169 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 05:58:54,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:54,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124994043] [2023-04-01 05:58:54,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124994043] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:54,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:54,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 05:58:54,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474995134] [2023-04-01 05:58:54,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:54,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:58:54,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:54,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:58:54,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:58:54,171 INFO L87 Difference]: Start difference. First operand 223 states and 266 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 05:58:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:54,531 INFO L93 Difference]: Finished difference Result 787 states and 986 transitions. [2023-04-01 05:58:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 05:58:54,532 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 05:58:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:54,535 INFO L225 Difference]: With dead ends: 787 [2023-04-01 05:58:54,536 INFO L226 Difference]: Without dead ends: 586 [2023-04-01 05:58:54,537 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 05:58:54,538 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 175 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:58:54,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 703 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:58:54,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2023-04-01 05:58:54,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 562. [2023-04-01 05:58:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 307 states have (on average 1.283387622149837) internal successors, (394), 365 states have internal predecessors, (394), 144 states have call successors, (144), 120 states have call predecessors, (144), 110 states have return successors, (151), 104 states have call predecessors, (151), 140 states have call successors, (151) [2023-04-01 05:58:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 689 transitions. [2023-04-01 05:58:54,608 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 689 transitions. Word has length 51 [2023-04-01 05:58:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:54,609 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 689 transitions. [2023-04-01 05:58:54,609 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 05:58:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 689 transitions. [2023-04-01 05:58:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 05:58:54,613 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:54,613 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 05:58:54,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 05:58:54,613 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:54,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:54,614 INFO L85 PathProgramCache]: Analyzing trace with hash 402352438, now seen corresponding path program 1 times [2023-04-01 05:58:54,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:54,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677429024] [2023-04-01 05:58:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:54,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:54,707 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 05:58:54,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:54,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677429024] [2023-04-01 05:58:54,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677429024] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:58:54,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:58:54,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:58:54,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212515988] [2023-04-01 05:58:54,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:58:54,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:58:54,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:58:54,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:58:54,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:58:54,711 INFO L87 Difference]: Start difference. First operand 562 states and 689 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 05:58:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:58:54,868 INFO L93 Difference]: Finished difference Result 934 states and 1183 transitions. [2023-04-01 05:58:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:58:54,869 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 05:58:54,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:58:54,873 INFO L225 Difference]: With dead ends: 934 [2023-04-01 05:58:54,873 INFO L226 Difference]: Without dead ends: 394 [2023-04-01 05:58:54,875 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 05:58:54,878 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 80 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:58:54,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 41 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:58:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-04-01 05:58:54,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 382. [2023-04-01 05:58:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 229 states have (on average 1.1965065502183405) internal successors, (274), 251 states have internal predecessors, (274), 78 states have call successors, (78), 78 states have call predecessors, (78), 74 states have return successors, (77), 74 states have call predecessors, (77), 74 states have call successors, (77) [2023-04-01 05:58:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 429 transitions. [2023-04-01 05:58:54,926 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 429 transitions. Word has length 54 [2023-04-01 05:58:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:58:54,926 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 429 transitions. [2023-04-01 05:58:54,927 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 05:58:54,927 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 429 transitions. [2023-04-01 05:58:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 05:58:54,930 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:58:54,930 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:58:54,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 05:58:54,930 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:58:54,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:58:54,931 INFO L85 PathProgramCache]: Analyzing trace with hash 86159206, now seen corresponding path program 1 times [2023-04-01 05:58:54,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:58:54,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164803013] [2023-04-01 05:58:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:54,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:58:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:58:55,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:58:55,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164803013] [2023-04-01 05:58:55,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164803013] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:58:55,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515893000] [2023-04-01 05:58:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:58:55,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:58:55,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:58:55,139 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 05:58:55,141 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 05:58:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:58:55,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 05:58:55,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:58:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 05:58:55,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:58:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:58:56,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515893000] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:58:56,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1042302912] [2023-04-01 05:58:56,156 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2023-04-01 05:58:56,156 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:58:56,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:58:56,165 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:58:56,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:58:56,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 05:58:56,440 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2023-04-01 05:58:56,657 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 32 for LOIs [2023-04-01 05:58:56,673 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 24 for LOIs [2023-04-01 05:58:56,677 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 24 for LOIs [2023-04-01 05:58:56,683 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 32 for LOIs [2023-04-01 05:59:03,467 INFO L197 IcfgInterpreter]: Interpreting procedure stopSystem with input of size 37 for LOIs [2023-04-01 05:59:03,479 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 46 for LOIs [2023-04-01 05:59:03,488 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 32 for LOIs [2023-04-01 05:59:03,606 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 22 for LOIs [2023-04-01 05:59:03,644 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 24 for LOIs [2023-04-01 05:59:03,647 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 22 for LOIs [2023-04-01 05:59:03,649 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 24 for LOIs [2023-04-01 05:59:03,652 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 24 for LOIs [2023-04-01 05:59:03,653 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:59:07,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1042302912] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:59:07,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:59:07,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [7, 14, 12] total 63 [2023-04-01 05:59:07,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514399517] [2023-04-01 05:59:07,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:59:07,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-01 05:59:07,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:59:07,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-01 05:59:07,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=3515, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 05:59:07,032 INFO L87 Difference]: Start difference. First operand 382 states and 429 transitions. Second operand has 37 states, 25 states have (on average 1.36) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-01 05:59:20,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:59:20,619 INFO L93 Difference]: Finished difference Result 1214 states and 1416 transitions. [2023-04-01 05:59:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-04-01 05:59:20,620 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 25 states have (on average 1.36) internal successors, (34), 29 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 79 [2023-04-01 05:59:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:59:20,623 INFO L225 Difference]: With dead ends: 1214 [2023-04-01 05:59:20,624 INFO L226 Difference]: Without dead ends: 826 [2023-04-01 05:59:20,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4909 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=2184, Invalid=14328, Unknown=0, NotChecked=0, Total=16512 [2023-04-01 05:59:20,633 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 867 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 4524 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 5176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 4524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:59:20,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 557 Invalid, 5176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 4524 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 05:59:20,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2023-04-01 05:59:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 655. [2023-04-01 05:59:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 409 states have (on average 1.2053789731051345) internal successors, (493), 446 states have internal predecessors, (493), 126 states have call successors, (126), 123 states have call predecessors, (126), 119 states have return successors, (127), 120 states have call predecessors, (127), 122 states have call successors, (127) [2023-04-01 05:59:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 746 transitions. [2023-04-01 05:59:20,742 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 746 transitions. Word has length 79 [2023-04-01 05:59:20,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:59:20,744 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 746 transitions. [2023-04-01 05:59:20,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 25 states have (on average 1.36) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-01 05:59:20,744 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 746 transitions. [2023-04-01 05:59:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 05:59:20,746 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:59:20,746 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, 1, 1, 1, 1] [2023-04-01 05:59:20,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:59:20,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 05:59:20,954 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:59:20,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:59:20,954 INFO L85 PathProgramCache]: Analyzing trace with hash -269432344, now seen corresponding path program 1 times [2023-04-01 05:59:20,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:59:20,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656788204] [2023-04-01 05:59:20,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:59:20,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:59:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:59:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:59:21,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:59:21,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656788204] [2023-04-01 05:59:21,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656788204] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:59:21,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217679125] [2023-04-01 05:59:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:59:21,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:59:21,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:59:21,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:59:21,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:59:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:59:21,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 05:59:21,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:59:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 05:59:21,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:59:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:59:21,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217679125] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:59:21,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [723762457] [2023-04-01 05:59:21,910 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2023-04-01 05:59:21,910 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:59:21,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:59:21,911 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:59:21,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:59:22,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 05:59:22,035 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2023-04-01 05:59:22,144 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 32 for LOIs [2023-04-01 05:59:22,152 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 24 for LOIs [2023-04-01 05:59:22,154 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 24 for LOIs [2023-04-01 05:59:22,156 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 32 for LOIs [2023-04-01 05:59:28,959 INFO L197 IcfgInterpreter]: Interpreting procedure stopSystem with input of size 61 for LOIs [2023-04-01 05:59:28,977 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 66 for LOIs [2023-04-01 05:59:28,986 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 37 for LOIs [2023-04-01 05:59:29,077 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 26 for LOIs [2023-04-01 05:59:29,120 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 28 for LOIs [2023-04-01 05:59:29,123 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 26 for LOIs [2023-04-01 05:59:29,125 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 39 for LOIs [2023-04-01 05:59:29,137 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 24 for LOIs [2023-04-01 05:59:29,140 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 24 for LOIs [2023-04-01 05:59:29,141 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:59:34,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [723762457] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:59:34,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:59:34,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [7, 14, 12] total 65 [2023-04-01 05:59:34,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173738961] [2023-04-01 05:59:34,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:59:34,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-01 05:59:34,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:59:34,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-01 05:59:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=3761, Unknown=0, NotChecked=0, Total=4160 [2023-04-01 05:59:34,036 INFO L87 Difference]: Start difference. First operand 655 states and 746 transitions. Second operand has 39 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 30 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)