/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/elevator_spec1_product25.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:39:36,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:39:36,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:39:36,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:39:36,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:39:36,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:39:36,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:39:36,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:39:36,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:39:36,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:39:36,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:39:36,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:39:36,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:39:36,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:39:36,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:39:36,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:39:36,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:39:36,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:39:36,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:39:36,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:39:36,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:39:36,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:39:36,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:39:36,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:39:36,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:39:36,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:39:36,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:39:36,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:39:36,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:39:36,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:39:36,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:39:36,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:39:36,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:39:36,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:39:36,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:39:36,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:39:36,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:39:36,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:39:36,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:39:36,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:39:36,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:39:36,364 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 11:39:36,398 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:39:36,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:39:36,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:39:36,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:39:36,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:39:36,400 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:39:36,400 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:39:36,400 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:39:36,400 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:39:36,400 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:39:36,400 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:39:36,400 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:39:36,400 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:39:36,400 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:39:36,401 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:39:36,401 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:39:36,401 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:39:36,401 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:39:36,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:39:36,401 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:39:36,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:39:36,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:39:36,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:39:36,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:39:36,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:39:36,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:39:36,402 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:39:36,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:39:36,402 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:39:36,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:39:36,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:39:36,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:39:36,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:39:36,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:39:36,403 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:39:36,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:39:36,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:39:36,403 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:39:36,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:39:36,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:39:36,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:39:36,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:39:36,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:39:36,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:39:36,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:39:36,667 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:39:36,668 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:39:36,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2023-04-01 11:39:37,831 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:39:38,100 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:39:38,101 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2023-04-01 11:39:38,124 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c78038b64/b67b2ea58bcf4ecdaf9ca2bdaf2f25d5/FLAG2236a5f1c [2023-04-01 11:39:38,144 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c78038b64/b67b2ea58bcf4ecdaf9ca2bdaf2f25d5 [2023-04-01 11:39:38,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:39:38,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:39:38,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:39:38,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:39:38,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:39:38,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:39:38" (1/1) ... [2023-04-01 11:39:38,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ea6204f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:38, skipping insertion in model container [2023-04-01 11:39:38,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:39:38" (1/1) ... [2023-04-01 11:39:38,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:39:38,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:39:38,491 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/elevator_spec1_product25.cil.c[13407,13420] [2023-04-01 11:39:38,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:39:38,669 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:39:38,704 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/elevator_spec1_product25.cil.c[13407,13420] [2023-04-01 11:39:38,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:39:38,779 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:39:38,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:38 WrapperNode [2023-04-01 11:39:38,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:39:38,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:39:38,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:39:38,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:39:38,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:38" (1/1) ... [2023-04-01 11:39:38,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:38" (1/1) ... [2023-04-01 11:39:38,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:38" (1/1) ... [2023-04-01 11:39:38,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:38" (1/1) ... [2023-04-01 11:39:38,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:38" (1/1) ... [2023-04-01 11:39:38,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:38" (1/1) ... [2023-04-01 11:39:38,883 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:38" (1/1) ... [2023-04-01 11:39:38,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:38" (1/1) ... [2023-04-01 11:39:38,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:39:38,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:39:38,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:39:38,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:39:38,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:38" (1/1) ... [2023-04-01 11:39:38,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:39:38,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:39:38,949 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 11:39:38,951 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 11:39:38,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:39:38,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:39:38,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 11:39:38,980 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:39:38,980 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 11:39:38,980 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 11:39:38,980 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 11:39:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 11:39:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 11:39:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 11:39:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 11:39:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 11:39:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 11:39:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 11:39:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 11:39:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 11:39:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 11:39:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 11:39:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 11:39:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 11:39:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 11:39:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 11:39:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 11:39:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 11:39:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 11:39:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 11:39:38,982 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 11:39:38,983 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 11:39:38,983 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 11:39:38,983 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 11:39:38,983 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 11:39:38,983 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 11:39:38,983 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 11:39:38,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:39:38,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2023-04-01 11:39:38,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2023-04-01 11:39:38,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2023-04-01 11:39:38,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2023-04-01 11:39:38,984 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 11:39:38,984 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 11:39:38,984 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 11:39:38,984 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 11:39:38,984 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 11:39:38,984 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 11:39:38,984 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 11:39:38,984 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 11:39:38,984 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 11:39:38,984 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 11:39:38,985 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 11:39:38,985 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 11:39:38,985 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 11:39:38,985 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 11:39:38,985 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 11:39:38,985 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-01 11:39:38,985 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 11:39:38,985 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 11:39:38,985 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-01 11:39:38,986 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 11:39:38,986 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 11:39:38,986 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 11:39:38,986 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 11:39:38,986 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 11:39:38,986 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 11:39:38,986 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 11:39:38,986 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 11:39:38,986 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 11:39:38,986 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 11:39:38,987 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 11:39:38,987 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 11:39:38,987 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 11:39:38,987 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 11:39:38,987 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 11:39:38,987 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 11:39:38,987 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 11:39:38,987 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 11:39:38,987 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 11:39:38,987 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:39:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:39:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:39:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:39:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:39:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 11:39:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 11:39:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 11:39:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 11:39:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 11:39:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 11:39:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 11:39:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 11:39:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 11:39:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:39:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 11:39:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 11:39:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:39:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 11:39:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 11:39:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:39:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 11:39:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 11:39:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 11:39:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 11:39:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 11:39:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 11:39:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 11:39:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 11:39:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 11:39:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 11:39:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 11:39:38,990 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 11:39:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 11:39:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 11:39:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 11:39:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 11:39:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 11:39:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 11:39:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 11:39:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 11:39:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 11:39:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 11:39:38,991 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 11:39:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 11:39:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 11:39:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 11:39:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 11:39:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 11:39:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 11:39:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 11:39:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2023-04-01 11:39:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2023-04-01 11:39:38,992 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 11:39:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 11:39:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:39:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 11:39:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 11:39:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2023-04-01 11:39:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2023-04-01 11:39:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 11:39:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 11:39:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 11:39:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 11:39:38,993 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 11:39:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 11:39:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 11:39:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 11:39:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 11:39:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 11:39:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 11:39:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 11:39:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 11:39:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 11:39:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-01 11:39:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 11:39:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-01 11:39:38,994 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 11:39:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 11:39:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 11:39:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 11:39:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 11:39:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 11:39:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 11:39:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 11:39:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 11:39:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 11:39:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 11:39:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:39:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:39:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:39:39,250 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:39:39,254 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:39:40,554 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:39:41,340 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:39:41,340 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 11:39:41,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:39:41 BoogieIcfgContainer [2023-04-01 11:39:41,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:39:41,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:39:41,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:39:41,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:39:41,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:39:38" (1/3) ... [2023-04-01 11:39:41,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632efd31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:39:41, skipping insertion in model container [2023-04-01 11:39:41,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:39:38" (2/3) ... [2023-04-01 11:39:41,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632efd31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:39:41, skipping insertion in model container [2023-04-01 11:39:41,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:39:41" (3/3) ... [2023-04-01 11:39:41,352 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product25.cil.c [2023-04-01 11:39:41,368 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:39:41,368 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:39:41,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:39:41,440 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;@5d9998cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:39:41,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:39:41,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 550 states, 320 states have (on average 1.5) internal successors, (480), 347 states have internal predecessors, (480), 168 states have call successors, (168), 49 states have call predecessors, (168), 49 states have return successors, (168), 159 states have call predecessors, (168), 168 states have call successors, (168) [2023-04-01 11:39:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 11:39:41,469 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:41,469 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:41,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:41,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:41,474 INFO L85 PathProgramCache]: Analyzing trace with hash -614917781, now seen corresponding path program 1 times [2023-04-01 11:39:41,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:41,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247105805] [2023-04-01 11:39:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:41,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:39:42,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:42,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247105805] [2023-04-01 11:39:42,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247105805] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:42,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:42,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:39:42,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687763346] [2023-04-01 11:39:42,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:42,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:39:42,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:42,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:39:42,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:39:42,563 INFO L87 Difference]: Start difference. First operand has 550 states, 320 states have (on average 1.5) internal successors, (480), 347 states have internal predecessors, (480), 168 states have call successors, (168), 49 states have call predecessors, (168), 49 states have return successors, (168), 159 states have call predecessors, (168), 168 states have call successors, (168) Second operand has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 11:39:43,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:43,042 INFO L93 Difference]: Finished difference Result 853 states and 1312 transitions. [2023-04-01 11:39:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:39:43,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 115 [2023-04-01 11:39:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:43,058 INFO L225 Difference]: With dead ends: 853 [2023-04-01 11:39:43,058 INFO L226 Difference]: Without dead ends: 464 [2023-04-01 11:39:43,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:39:43,067 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 34 mSDsluCounter, 3681 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 4298 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:43,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 4298 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:39:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-04-01 11:39:43,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 429. [2023-04-01 11:39:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 270 states have (on average 1.5333333333333334) internal successors, (414), 289 states have internal predecessors, (414), 115 states have call successors, (115), 46 states have call predecessors, (115), 43 states have return successors, (108), 105 states have call predecessors, (108), 107 states have call successors, (108) [2023-04-01 11:39:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 637 transitions. [2023-04-01 11:39:43,144 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 637 transitions. Word has length 115 [2023-04-01 11:39:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:43,144 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 637 transitions. [2023-04-01 11:39:43,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 11:39:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 637 transitions. [2023-04-01 11:39:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-01 11:39:43,159 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:43,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:43,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:39:43,160 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:43,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:43,161 INFO L85 PathProgramCache]: Analyzing trace with hash -89212884, now seen corresponding path program 1 times [2023-04-01 11:39:43,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:43,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121149413] [2023-04-01 11:39:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:43,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:39:43,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:43,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121149413] [2023-04-01 11:39:43,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121149413] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:43,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:43,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:39:43,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373038247] [2023-04-01 11:39:43,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:43,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:39:43,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:43,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:39:43,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:39:43,981 INFO L87 Difference]: Start difference. First operand 429 states and 637 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 11:39:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:46,405 INFO L93 Difference]: Finished difference Result 1296 states and 1994 transitions. [2023-04-01 11:39:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 11:39:46,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 120 [2023-04-01 11:39:46,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:46,413 INFO L225 Difference]: With dead ends: 1296 [2023-04-01 11:39:46,413 INFO L226 Difference]: Without dead ends: 920 [2023-04-01 11:39:46,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-04-01 11:39:46,415 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 1700 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1774 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 3897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 3379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:46,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1774 Valid, 609 Invalid, 3897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 3379 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 11:39:46,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2023-04-01 11:39:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 893. [2023-04-01 11:39:46,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 593 states have (on average 1.5784148397976392) internal successors, (936), 628 states have internal predecessors, (936), 220 states have call successors, (220), 78 states have call predecessors, (220), 79 states have return successors, (220), 210 states have call predecessors, (220), 212 states have call successors, (220) [2023-04-01 11:39:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1376 transitions. [2023-04-01 11:39:46,483 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1376 transitions. Word has length 120 [2023-04-01 11:39:46,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:46,484 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1376 transitions. [2023-04-01 11:39:46,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 11:39:46,484 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1376 transitions. [2023-04-01 11:39:46,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-01 11:39:46,486 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:46,487 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:46,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:39:46,487 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:46,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:46,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1532939301, now seen corresponding path program 1 times [2023-04-01 11:39:46,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:46,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709409527] [2023-04-01 11:39:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:46,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:39:46,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:46,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709409527] [2023-04-01 11:39:46,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709409527] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:46,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:46,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:39:46,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078665254] [2023-04-01 11:39:46,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:46,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:39:46,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:46,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:39:46,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:39:46,750 INFO L87 Difference]: Start difference. First operand 893 states and 1376 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 11:39:46,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:46,890 INFO L93 Difference]: Finished difference Result 1406 states and 2182 transitions. [2023-04-01 11:39:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:39:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) Word has length 124 [2023-04-01 11:39:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:46,896 INFO L225 Difference]: With dead ends: 1406 [2023-04-01 11:39:46,896 INFO L226 Difference]: Without dead ends: 915 [2023-04-01 11:39:46,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:39:46,899 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 7 mSDsluCounter, 1761 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:46,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2360 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:39:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2023-04-01 11:39:46,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 905. [2023-04-01 11:39:46,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 602 states have (on average 1.569767441860465) internal successors, (945), 637 states have internal predecessors, (945), 220 states have call successors, (220), 78 states have call predecessors, (220), 82 states have return successors, (226), 213 states have call predecessors, (226), 212 states have call successors, (226) [2023-04-01 11:39:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1391 transitions. [2023-04-01 11:39:46,943 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1391 transitions. Word has length 124 [2023-04-01 11:39:46,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:46,944 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1391 transitions. [2023-04-01 11:39:46,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-01 11:39:46,944 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1391 transitions. [2023-04-01 11:39:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 11:39:46,947 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:46,947 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:39:46,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 11:39:46,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:46,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:46,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2108429811, now seen corresponding path program 1 times [2023-04-01 11:39:46,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:46,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862352702] [2023-04-01 11:39:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:46,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:39:47,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:47,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862352702] [2023-04-01 11:39:47,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862352702] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:47,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:47,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:39:47,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334411933] [2023-04-01 11:39:47,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:47,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:39:47,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:47,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:39:47,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:39:47,523 INFO L87 Difference]: Start difference. First operand 905 states and 1391 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 7 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) [2023-04-01 11:39:49,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:49,718 INFO L93 Difference]: Finished difference Result 1904 states and 2936 transitions. [2023-04-01 11:39:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:39:49,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 7 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) Word has length 128 [2023-04-01 11:39:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:49,727 INFO L225 Difference]: With dead ends: 1904 [2023-04-01 11:39:49,728 INFO L226 Difference]: Without dead ends: 1305 [2023-04-01 11:39:49,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:39:49,736 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 1402 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 3370 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 3821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 3370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:49,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1568 Valid, 449 Invalid, 3821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 3370 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 11:39:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2023-04-01 11:39:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1255. [2023-04-01 11:39:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 820 states have (on average 1.5219512195121951) internal successors, (1248), 872 states have internal predecessors, (1248), 312 states have call successors, (312), 114 states have call predecessors, (312), 122 states have return successors, (328), 304 states have call predecessors, (328), 304 states have call successors, (328) [2023-04-01 11:39:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1888 transitions. [2023-04-01 11:39:49,816 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1888 transitions. Word has length 128 [2023-04-01 11:39:49,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:49,817 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1888 transitions. [2023-04-01 11:39:49,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 7 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) [2023-04-01 11:39:49,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1888 transitions. [2023-04-01 11:39:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 11:39:49,820 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:49,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:39:49,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 11:39:49,821 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:49,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:49,822 INFO L85 PathProgramCache]: Analyzing trace with hash -84815879, now seen corresponding path program 1 times [2023-04-01 11:39:49,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:49,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269155427] [2023-04-01 11:39:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:49,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:39:50,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:50,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269155427] [2023-04-01 11:39:50,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269155427] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:50,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:50,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:39:50,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530432473] [2023-04-01 11:39:50,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:50,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:39:50,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:50,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:39:50,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:39:50,265 INFO L87 Difference]: Start difference. First operand 1255 states and 1888 transitions. Second operand has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-01 11:39:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:50,587 INFO L93 Difference]: Finished difference Result 2348 states and 3621 transitions. [2023-04-01 11:39:50,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:39:50,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 131 [2023-04-01 11:39:50,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:50,595 INFO L225 Difference]: With dead ends: 2348 [2023-04-01 11:39:50,596 INFO L226 Difference]: Without dead ends: 1255 [2023-04-01 11:39:50,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:39:50,602 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 211 mSDsluCounter, 2863 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 3482 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:50,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 3482 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:39:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2023-04-01 11:39:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1255. [2023-04-01 11:39:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 820 states have (on average 1.4829268292682927) internal successors, (1216), 872 states have internal predecessors, (1216), 312 states have call successors, (312), 114 states have call predecessors, (312), 122 states have return successors, (328), 304 states have call predecessors, (328), 304 states have call successors, (328) [2023-04-01 11:39:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1856 transitions. [2023-04-01 11:39:50,673 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1856 transitions. Word has length 131 [2023-04-01 11:39:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:50,673 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1856 transitions. [2023-04-01 11:39:50,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2023-04-01 11:39:50,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1856 transitions. [2023-04-01 11:39:50,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-01 11:39:50,676 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:50,676 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:39:50,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 11:39:50,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:50,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:50,676 INFO L85 PathProgramCache]: Analyzing trace with hash -216410577, now seen corresponding path program 1 times [2023-04-01 11:39:50,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:50,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244001428] [2023-04-01 11:39:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:50,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 11:39:51,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:51,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244001428] [2023-04-01 11:39:51,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244001428] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:51,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:51,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:39:51,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665369888] [2023-04-01 11:39:51,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:51,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:39:51,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:51,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:39:51,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:39:51,191 INFO L87 Difference]: Start difference. First operand 1255 states and 1856 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 5 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (26), 5 states have call predecessors, (26), 4 states have call successors, (26) [2023-04-01 11:39:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:53,209 INFO L93 Difference]: Finished difference Result 2217 states and 3291 transitions. [2023-04-01 11:39:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:39:53,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 5 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (26), 5 states have call predecessors, (26), 4 states have call successors, (26) Word has length 133 [2023-04-01 11:39:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:53,220 INFO L225 Difference]: With dead ends: 2217 [2023-04-01 11:39:53,220 INFO L226 Difference]: Without dead ends: 1325 [2023-04-01 11:39:53,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:39:53,224 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 991 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 3150 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 3557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 3150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:53,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1072 Valid, 501 Invalid, 3557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 3150 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 11:39:53,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2023-04-01 11:39:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1282. [2023-04-01 11:39:53,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 838 states have (on average 1.477326968973747) internal successors, (1238), 894 states have internal predecessors, (1238), 313 states have call successors, (313), 119 states have call predecessors, (313), 130 states have return successors, (339), 304 states have call predecessors, (339), 305 states have call successors, (339) [2023-04-01 11:39:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1890 transitions. [2023-04-01 11:39:53,322 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1890 transitions. Word has length 133 [2023-04-01 11:39:53,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:53,323 INFO L495 AbstractCegarLoop]: Abstraction has 1282 states and 1890 transitions. [2023-04-01 11:39:53,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 5 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (26), 5 states have call predecessors, (26), 4 states have call successors, (26) [2023-04-01 11:39:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1890 transitions. [2023-04-01 11:39:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 11:39:53,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:53,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:39:53,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 11:39:53,326 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:53,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:53,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2028904282, now seen corresponding path program 1 times [2023-04-01 11:39:53,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:53,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648934971] [2023-04-01 11:39:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:53,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 11:39:53,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:53,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648934971] [2023-04-01 11:39:53,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648934971] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:53,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:53,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:39:53,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459208739] [2023-04-01 11:39:53,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:53,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:39:53,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:53,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:39:53,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:39:53,639 INFO L87 Difference]: Start difference. First operand 1282 states and 1890 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 11:39:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:54,075 INFO L93 Difference]: Finished difference Result 1322 states and 1947 transitions. [2023-04-01 11:39:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:39:54,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) Word has length 137 [2023-04-01 11:39:54,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:54,085 INFO L225 Difference]: With dead ends: 1322 [2023-04-01 11:39:54,085 INFO L226 Difference]: Without dead ends: 1305 [2023-04-01 11:39:54,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:39:54,087 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 639 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:54,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 1526 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 11:39:54,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2023-04-01 11:39:54,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1286. [2023-04-01 11:39:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 842 states have (on average 1.4750593824228029) internal successors, (1242), 898 states have internal predecessors, (1242), 313 states have call successors, (313), 119 states have call predecessors, (313), 130 states have return successors, (339), 304 states have call predecessors, (339), 305 states have call successors, (339) [2023-04-01 11:39:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1894 transitions. [2023-04-01 11:39:54,169 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1894 transitions. Word has length 137 [2023-04-01 11:39:54,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:54,170 INFO L495 AbstractCegarLoop]: Abstraction has 1286 states and 1894 transitions. [2023-04-01 11:39:54,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 11:39:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1894 transitions. [2023-04-01 11:39:54,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-04-01 11:39:54,172 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:54,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:39:54,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 11:39:54,172 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:54,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:54,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1655446865, now seen corresponding path program 1 times [2023-04-01 11:39:54,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:54,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438960284] [2023-04-01 11:39:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:54,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 11:39:54,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:54,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438960284] [2023-04-01 11:39:54,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438960284] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:39:54,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:39:54,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:39:54,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904982460] [2023-04-01 11:39:54,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:39:54,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:39:54,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:39:54,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:39:54,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:39:54,588 INFO L87 Difference]: Start difference. First operand 1286 states and 1894 transitions. Second operand has 8 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (28), 4 states have call predecessors, (28), 1 states have call successors, (28) [2023-04-01 11:39:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:39:54,801 INFO L93 Difference]: Finished difference Result 1307 states and 1920 transitions. [2023-04-01 11:39:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:39:54,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (28), 4 states have call predecessors, (28), 1 states have call successors, (28) Word has length 142 [2023-04-01 11:39:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:39:54,810 INFO L225 Difference]: With dead ends: 1307 [2023-04-01 11:39:54,810 INFO L226 Difference]: Without dead ends: 1290 [2023-04-01 11:39:54,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:39:54,812 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 10 mSDsluCounter, 3485 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4069 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:39:54,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4069 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:39:54,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2023-04-01 11:39:54,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1286. [2023-04-01 11:39:54,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 842 states have (on average 1.4714964370546317) internal successors, (1239), 898 states have internal predecessors, (1239), 313 states have call successors, (313), 119 states have call predecessors, (313), 130 states have return successors, (339), 304 states have call predecessors, (339), 305 states have call successors, (339) [2023-04-01 11:39:54,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1891 transitions. [2023-04-01 11:39:54,885 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1891 transitions. Word has length 142 [2023-04-01 11:39:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:39:54,886 INFO L495 AbstractCegarLoop]: Abstraction has 1286 states and 1891 transitions. [2023-04-01 11:39:54,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (28), 4 states have call predecessors, (28), 1 states have call successors, (28) [2023-04-01 11:39:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1891 transitions. [2023-04-01 11:39:54,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-01 11:39:54,888 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:39:54,889 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:39:54,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 11:39:54,889 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:39:54,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:39:54,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1154589260, now seen corresponding path program 1 times [2023-04-01 11:39:54,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:39:54,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585245132] [2023-04-01 11:39:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:54,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:39:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 11:39:57,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:39:57,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585245132] [2023-04-01 11:39:57,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585245132] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:39:57,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906521432] [2023-04-01 11:39:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:39:57,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:39:57,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:39:57,465 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 11:39:57,483 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 11:39:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:39:57,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 2955 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 11:39:57,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:39:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:39:59,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:40:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 11:40:03,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906521432] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:40:03,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1795110847] [2023-04-01 11:40:03,990 INFO L159 IcfgInterpreter]: Started Sifa with 140 locations of interest [2023-04-01 11:40:03,990 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:40:04,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:40:04,008 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:40:04,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:40:16,206 WARN L223 SmtUtils]: Spent 9.55s on a formula simplification. DAG size of input: 884 DAG size of output: 884 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 11:40:25,230 WARN L223 SmtUtils]: Spent 9.02s on a formula simplification. DAG size of input: 884 DAG size of output: 884 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 11:40:27,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 184 for LOIs [2023-04-01 11:40:27,777 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 994 for LOIs