/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/product-lines/minepump_spec4_product44.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:06:17,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:06:17,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:06:17,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:06:17,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:06:17,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:06:17,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:06:17,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:06:17,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:06:17,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:06:17,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:06:17,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:06:17,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:06:17,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:06:17,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:06:17,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:06:17,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:06:17,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:06:17,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:06:17,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:06:17,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:06:17,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:06:17,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:06:17,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:06:17,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:06:17,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:06:17,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:06:17,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:06:17,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:06:17,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:06:17,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:06:17,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:06:17,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:06:17,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:06:17,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:06:17,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:06:17,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:06:17,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:06:17,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:06:17,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:06:17,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:06:17,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:06:17,613 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:06:17,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:06:17,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:06:17,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:06:17,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:06:17,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:06:17,615 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:06:17,615 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:06:17,615 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:06:17,615 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:06:17,616 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:06:17,616 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:06:17,616 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:06:17,616 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:06:17,616 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:06:17,617 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:06:17,617 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:06:17,617 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:06:17,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:06:17,618 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:06:17,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:06:17,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:06:17,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:06:17,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:06:17,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:06:17,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:06:17,619 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:06:17,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:06:17,619 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:06:17,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:06:17,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:06:17,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:06:17,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:06:17,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:06:17,620 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:06:17,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:06:17,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:06:17,620 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:06:17,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:06:17,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:06:17,621 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:06:17,621 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:06:17,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:06:17,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:06:17,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:06:17,903 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:06:17,903 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:06:17,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/minepump_spec4_product44.cil.c [2023-04-01 12:06:19,235 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:06:19,486 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:06:19,487 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product44.cil.c [2023-04-01 12:06:19,497 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08a5bd9db/5c071446540546039cfc3cc19cb15453/FLAG1ed669d07 [2023-04-01 12:06:19,512 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08a5bd9db/5c071446540546039cfc3cc19cb15453 [2023-04-01 12:06:19,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:06:19,527 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:06:19,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:06:19,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:06:19,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:06:19,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:06:19" (1/1) ... [2023-04-01 12:06:19,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ebf22c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:19, skipping insertion in model container [2023-04-01 12:06:19,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:06:19" (1/1) ... [2023-04-01 12:06:19,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:06:19,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:06:19,856 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_product44.cil.c[15806,15819] [2023-04-01 12:06:19,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:06:19,900 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:06:19,977 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_product44.cil.c[15806,15819] [2023-04-01 12:06:19,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:06:20,009 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:06:20,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:20 WrapperNode [2023-04-01 12:06:20,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:06:20,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:06:20,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:06:20,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:06:20,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:20" (1/1) ... [2023-04-01 12:06:20,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:20" (1/1) ... [2023-04-01 12:06:20,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:20" (1/1) ... [2023-04-01 12:06:20,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:20" (1/1) ... [2023-04-01 12:06:20,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:20" (1/1) ... [2023-04-01 12:06:20,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:20" (1/1) ... [2023-04-01 12:06:20,104 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:20" (1/1) ... [2023-04-01 12:06:20,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:20" (1/1) ... [2023-04-01 12:06:20,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:06:20,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:06:20,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:06:20,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:06:20,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:20" (1/1) ... [2023-04-01 12:06:20,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:06:20,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:06:20,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:06:20,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:06:20,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:06:20,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:06:20,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 12:06:20,203 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:06:20,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2023-04-01 12:06:20,207 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 12:06:20,207 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 12:06:20,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 12:06:20,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 12:06:20,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 12:06:20,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 12:06:20,208 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 12:06:20,208 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 12:06:20,208 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 12:06:20,208 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 12:06:20,208 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 12:06:20,208 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 12:06:20,208 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-04-01 12:06:20,209 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2023-04-01 12:06:20,209 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__highWaterSensor [2023-04-01 12:06:20,209 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2023-04-01 12:06:20,209 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-04-01 12:06:20,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-04-01 12:06:20,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-04-01 12:06:20,209 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2023-04-01 12:06:20,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2023-04-01 12:06:20,209 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2023-04-01 12:06:20,209 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2023-04-01 12:06:20,210 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 12:06:20,210 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 12:06:20,210 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 12:06:20,210 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 12:06:20,210 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 12:06:20,210 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:06:20,210 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2023-04-01 12:06:20,210 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-04-01 12:06:20,210 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-04-01 12:06:20,210 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-04-01 12:06:20,210 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2023-04-01 12:06:20,211 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2023-04-01 12:06:20,211 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2023-04-01 12:06:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:06:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:06:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:06:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:06:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 12:06:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 12:06:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 12:06:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-04-01 12:06:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2023-04-01 12:06:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2023-04-01 12:06:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 12:06:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 12:06:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 12:06:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 12:06:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 12:06:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:06:20,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 12:06:20,213 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 12:06:20,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:06:20,214 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 12:06:20,214 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 12:06:20,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:06:20,214 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 12:06:20,214 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 12:06:20,214 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 12:06:20,214 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 12:06:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 12:06:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 12:06:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 12:06:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-04-01 12:06:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-04-01 12:06:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2023-04-01 12:06:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2023-04-01 12:06:20,215 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 12:06:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 12:06:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 12:06:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2023-04-01 12:06:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-04-01 12:06:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2023-04-01 12:06:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2023-04-01 12:06:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2023-04-01 12:06:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-04-01 12:06:20,216 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2023-04-01 12:06:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2023-04-01 12:06:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-04-01 12:06:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2023-04-01 12:06:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__highWaterSensor [2023-04-01 12:06:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-04-01 12:06:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 12:06:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 12:06:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 12:06:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:06:20,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:06:20,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:06:20,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:06:20,344 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:06:20,347 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:06:20,972 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:06:21,095 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:06:21,096 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 12:06:21,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:06:21 BoogieIcfgContainer [2023-04-01 12:06:21,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:06:21,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:06:21,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:06:21,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:06:21,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:06:19" (1/3) ... [2023-04-01 12:06:21,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d58430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:06:21, skipping insertion in model container [2023-04-01 12:06:21,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:06:20" (2/3) ... [2023-04-01 12:06:21,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d58430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:06:21, skipping insertion in model container [2023-04-01 12:06:21,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:06:21" (3/3) ... [2023-04-01 12:06:21,109 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product44.cil.c [2023-04-01 12:06:21,126 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:06:21,127 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:06:21,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:06:21,202 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;@4f955b9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:06:21,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:06:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 146 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 81 states have internal predecessors, (85), 46 states have call successors, (46), 30 states have call predecessors, (46), 30 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2023-04-01 12:06:21,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 12:06:21,216 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:06:21,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:06:21,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:06:21,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:06:21,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2065255042, now seen corresponding path program 1 times [2023-04-01 12:06:21,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:06:21,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145064732] [2023-04-01 12:06:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:06:21,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:06:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:06:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:06:21,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:06:21,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145064732] [2023-04-01 12:06:21,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145064732] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:06:21,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:06:21,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 12:06:21,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898684940] [2023-04-01 12:06:21,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:06:21,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 12:06:21,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:06:21,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 12:06:21,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 12:06:21,506 INFO L87 Difference]: Start difference. First operand has 146 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 81 states have internal predecessors, (85), 46 states have call successors, (46), 30 states have call predecessors, (46), 30 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 12:06:21,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:06:21,582 INFO L93 Difference]: Finished difference Result 225 states and 268 transitions. [2023-04-01 12:06:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 12:06:21,590 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-04-01 12:06:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:06:21,599 INFO L225 Difference]: With dead ends: 225 [2023-04-01 12:06:21,599 INFO L226 Difference]: Without dead ends: 113 [2023-04-01 12:06:21,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 12:06:21,605 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:06:21,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 121 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:06:21,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-01 12:06:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-04-01 12:06:21,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 69 states have internal predecessors, (71), 31 states have call successors, (31), 28 states have call predecessors, (31), 23 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-04-01 12:06:21,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 128 transitions. [2023-04-01 12:06:21,649 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 128 transitions. Word has length 42 [2023-04-01 12:06:21,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:06:21,650 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 128 transitions. [2023-04-01 12:06:21,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 12:06:21,650 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 128 transitions. [2023-04-01 12:06:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 12:06:21,653 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:06:21,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:06:21,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:06:21,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:06:21,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:06:21,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1552403923, now seen corresponding path program 1 times [2023-04-01 12:06:21,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:06:21,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325693107] [2023-04-01 12:06:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:06:21,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:06:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:06:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:06:21,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:06:21,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325693107] [2023-04-01 12:06:21,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325693107] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:06:21,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:06:21,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:06:21,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71744168] [2023-04-01 12:06:21,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:06:21,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:06:21,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:06:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:06:21,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:06:21,788 INFO L87 Difference]: Start difference. First operand 113 states and 128 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 12:06:21,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:06:21,865 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2023-04-01 12:06:21,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:06:21,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-01 12:06:21,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:06:21,867 INFO L225 Difference]: With dead ends: 171 [2023-04-01 12:06:21,867 INFO L226 Difference]: Without dead ends: 105 [2023-04-01 12:06:21,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:06:21,869 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 11 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:06:21,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 185 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:06:21,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-01 12:06:21,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-04-01 12:06:21,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 64 states have internal predecessors, (65), 28 states have call successors, (28), 27 states have call predecessors, (28), 23 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-01 12:06:21,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2023-04-01 12:06:21,884 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 43 [2023-04-01 12:06:21,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:06:21,885 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2023-04-01 12:06:21,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 12:06:21,885 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2023-04-01 12:06:21,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 12:06:21,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:06:21,887 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 12:06:21,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:06:21,887 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:06:21,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:06:21,888 INFO L85 PathProgramCache]: Analyzing trace with hash -110599171, now seen corresponding path program 1 times [2023-04-01 12:06:21,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:06:21,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757869984] [2023-04-01 12:06:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:06:21,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:06:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:06:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:06:22,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:06:22,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757869984] [2023-04-01 12:06:22,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757869984] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:06:22,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:06:22,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:06:22,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647370497] [2023-04-01 12:06:22,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:06:22,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:06:22,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:06:22,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:06:22,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:06:22,143 INFO L87 Difference]: Start difference. First operand 105 states and 117 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 12:06:22,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:06:22,483 INFO L93 Difference]: Finished difference Result 316 states and 367 transitions. [2023-04-01 12:06:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:06:22,483 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 12:06:22,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:06:22,499 INFO L225 Difference]: With dead ends: 316 [2023-04-01 12:06:22,499 INFO L226 Difference]: Without dead ends: 233 [2023-04-01 12:06:22,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:06:22,503 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 184 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:06:22,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 490 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:06:22,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-04-01 12:06:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 211. [2023-04-01 12:06:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 114 states have (on average 1.2543859649122806) internal successors, (143), 133 states have internal predecessors, (143), 51 states have call successors, (51), 49 states have call predecessors, (51), 45 states have return successors, (48), 43 states have call predecessors, (48), 47 states have call successors, (48) [2023-04-01 12:06:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 242 transitions. [2023-04-01 12:06:22,559 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 242 transitions. Word has length 47 [2023-04-01 12:06:22,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:06:22,559 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 242 transitions. [2023-04-01 12:06:22,560 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 12:06:22,560 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 242 transitions. [2023-04-01 12:06:22,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 12:06:22,571 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:06:22,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:06:22,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:06:22,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:06:22,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:06:22,578 INFO L85 PathProgramCache]: Analyzing trace with hash -171749128, now seen corresponding path program 1 times [2023-04-01 12:06:22,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:06:22,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161538138] [2023-04-01 12:06:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:06:22,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:06:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:06:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:06:22,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:06:22,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161538138] [2023-04-01 12:06:22,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161538138] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:06:22,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:06:22,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 12:06:22,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227207473] [2023-04-01 12:06:22,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:06:22,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 12:06:22,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:06:22,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 12:06:22,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:06:22,882 INFO L87 Difference]: Start difference. First operand 211 states and 242 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 12:06:23,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:06:23,251 INFO L93 Difference]: Finished difference Result 739 states and 890 transitions. [2023-04-01 12:06:23,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:06:23,252 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 12:06:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:06:23,260 INFO L225 Difference]: With dead ends: 739 [2023-04-01 12:06:23,260 INFO L226 Difference]: Without dead ends: 550 [2023-04-01 12:06:23,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-04-01 12:06:23,272 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 205 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:06:23,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 645 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:06:23,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-04-01 12:06:23,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 526. [2023-04-01 12:06:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 295 states have (on average 1.2542372881355932) internal successors, (370), 341 states have internal predecessors, (370), 120 states have call successors, (120), 114 states have call predecessors, (120), 110 states have return successors, (127), 104 states have call predecessors, (127), 116 states have call successors, (127) [2023-04-01 12:06:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 617 transitions. [2023-04-01 12:06:23,362 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 617 transitions. Word has length 51 [2023-04-01 12:06:23,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:06:23,363 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 617 transitions. [2023-04-01 12:06:23,363 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 12:06:23,363 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 617 transitions. [2023-04-01 12:06:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 12:06:23,368 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:06:23,369 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 12:06:23,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:06:23,369 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:06:23,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:06:23,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1275540565, now seen corresponding path program 1 times [2023-04-01 12:06:23,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:06:23,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975316223] [2023-04-01 12:06:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:06:23,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:06:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:06:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:06:23,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:06:23,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975316223] [2023-04-01 12:06:23,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975316223] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:06:23,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:06:23,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:06:23,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001886032] [2023-04-01 12:06:23,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:06:23,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:06:23,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:06:23,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:06:23,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:06:23,488 INFO L87 Difference]: Start difference. First operand 526 states and 617 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 12:06:23,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:06:23,730 INFO L93 Difference]: Finished difference Result 1361 states and 1735 transitions. [2023-04-01 12:06:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:06:23,730 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 12:06:23,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:06:23,737 INFO L225 Difference]: With dead ends: 1361 [2023-04-01 12:06:23,737 INFO L226 Difference]: Without dead ends: 857 [2023-04-01 12:06:23,739 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 12:06:23,744 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 141 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:06:23,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 108 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:06:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2023-04-01 12:06:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 752. [2023-04-01 12:06:23,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 433 states have (on average 1.2217090069284064) internal successors, (529), 479 states have internal predecessors, (529), 155 states have call successors, (155), 153 states have call predecessors, (155), 163 states have return successors, (202), 154 states have call predecessors, (202), 151 states have call successors, (202) [2023-04-01 12:06:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 886 transitions. [2023-04-01 12:06:23,837 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 886 transitions. Word has length 54 [2023-04-01 12:06:23,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:06:23,837 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 886 transitions. [2023-04-01 12:06:23,837 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 12:06:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 886 transitions. [2023-04-01 12:06:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 12:06:23,841 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:06:23,842 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 12:06:23,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:06:23,842 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:06:23,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:06:23,843 INFO L85 PathProgramCache]: Analyzing trace with hash 702351345, now seen corresponding path program 1 times [2023-04-01 12:06:23,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:06:23,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026682182] [2023-04-01 12:06:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:06:23,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:06:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:06:24,078 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 12:06:24,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:06:24,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026682182] [2023-04-01 12:06:24,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026682182] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:06:24,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290766971] [2023-04-01 12:06:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:06:24,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:06:24,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:06:24,082 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:06:24,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:06:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:06:24,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 12:06:24,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:06:24,600 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 12:06:24,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:06:25,103 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 12:06:25,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290766971] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:06:25,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [959737397] [2023-04-01 12:06:25,157 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2023-04-01 12:06:25,158 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:06:25,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:06:25,166 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:06:25,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:06:25,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 12:06:25,804 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 127 for LOIs [2023-04-01 12:06:27,772 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 127 for LOIs [2023-04-01 12:06:27,856 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 119 for LOIs [2023-04-01 12:06:27,880 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 119 for LOIs [2023-04-01 12:06:27,904 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 127 for LOIs [2023-04-01 12:06:33,787 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:06:34,181 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:06:34,468 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:06:35,065 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:06:35,189 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:06:35,370 INFO L197 IcfgInterpreter]: Interpreting procedure stopSystem with input of size 168 for LOIs [2023-04-01 12:06:35,454 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 127 for LOIs [2023-04-01 12:06:35,526 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 159 for LOIs [2023-04-01 12:06:35,779 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 117 for LOIs [2023-04-01 12:06:36,223 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 119 for LOIs [2023-04-01 12:06:36,239 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 117 for LOIs [2023-04-01 12:06:36,251 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 119 for LOIs [2023-04-01 12:06:36,279 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 119 for LOIs [2023-04-01 12:06:36,300 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 12:06:48,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [959737397] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:06:48,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 12:06:48,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [7, 14, 12] total 61 [2023-04-01 12:06:48,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590001672] [2023-04-01 12:06:48,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:06:48,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 12:06:48,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:06:48,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 12:06:48,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=3266, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 12:06:48,332 INFO L87 Difference]: Start difference. First operand 752 states and 886 transitions. Second operand has 35 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 27 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)